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Ebyte LoRa E22 device for Arduino, esp32 or esp8266: fixed transmission, broadcast, monitor, and RSSI – 4

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We will now understand the various transmission types of our E22 UART LoRa device based on popular Semtech’s SX1262 and SX1268 RF chips.

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Ebyte LoRa E22 device for Arduino, esp32 or esp8266 fixed transmission and RSSI

Here a selection of LoRa devices AliExpress (433MHz 5.5Km) - AliExpress (433MHz 10Km) - AliExpress (868MHz 915Mhz 5.5Km) - AliExpress (868MHz 915Mhz 10Km)

In the first part, we’ve used a transparent transmission, so we send to all and receive from all that have the same address e channel.

LoRa E32 transmitting scenarios

But It isn’t a standard scenario, and we usually want to send to a specified point and receive a response.

If you have trouble with the device’s freeze, you must put a pull-up 4.7k resistor or better connect to the device AUX pin.

Normal mode

For normal transmission, you must set M0 and M1 to LOW, and It’s better if you connect the AUX pin to have a better synchronization, but not needed. You can check the connection of the AUX pin in the library complete example connection, and you only must add the PIN to the constructor.

Ebyte LoRa E32 E22 E220 Arduino UNO normal mode breadboard
M0GND (Set normal mode)
M1GND (Set normal mode)
TXPIN 2 (PullUP 4,7KΩ)
RXPIN 3 (PullUP 4,7KΩ & Voltage divider)
AUXNot connected (PullUP 4,7KΩ)
VCC5v
GNDGND

and this configuration for Wemos D1 mini:

Ebyte LoRa E32 E22 E220 Wemos D1 normal mode breadboard
M0GND (Set normal mode)
M1GND (Set normal mode)
TXPIN D2 (PullUP 4,7KΩ)
RXPIN D3 (PullUP 4,7KΩ)
AUXNot connected (PullUP 4,7KΩ)
VCC3.3v/5v
GNDGND

ESP-32:

Ebyte LoRa E32 E22 E220 ESP32 DEV KIT V1 normal mode breadboard
M0GND (Set normal mode)
M1GND (Set normal mode)
RXTX2 (PullUP 4,7KΩ)
TXRX2 (PullUP 4,7KΩ)
AUXNot connected (PullUP 4,7KΩ)
VCC3.3v/5v
GNDGND

Arduino MKR WiFi 1010:

Ebyte LoRa Exx Arduino MKR WiFi 1010 normal mode connected breadboard
M0GND (Set normal mode)
M1GND (Set normal mode)
TXPIN 14 Tx (PullUP 4,7KΩ)
RXPIN 13 Rx (PullUP 4,7KΩ)
AUXNot connected (PullUP 4,7KΩ)
VCC3.3v/5v
GNDGND

So you must only instantiate the constructor.

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

Transparent transmission

Generic sketch, select the correct constructor for every device:

/*
 * LoRa E22
 * send a transparent message, you must check that the transmitter and receiver have the same
 * CHANNEL ADDL and ADDH
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 * E22		  ----- Arduino
 * M0         ----- 7 (or GND)
 * M1         ----- 6 (or GND)
 * RX         ----- 4 (PullUP)
 * TX         ----- 5 (PullUP)
 * AUX        ----- 3  (PullUP)
 * VCC        ----- 3.3v/5v
 * GND        ----- GND
 *
 */

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ---------- esp32 pins --------------
// LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

//  If you have ever change configuration you must restore It
//	ResponseStructContainer c;
//	c = e22ttl.getConfiguration();
//	Configuration configuration = *(Configuration*) c.data;
//	Serial.println(c.status.getResponseDescription());
//	configuration.CHAN = 0x17;
//	configuration.OPTION.fixedTransmission = FT_TRANSPARENT_TRANSMISSION;
//	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);

  Serial.println("Hi, I'm going to send message!");

  // Send message
  ResponseStatus rs = e22ttl.sendMessage("Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
	ResponseContainer rc = e22ttl.receiveMessage();
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  e22ttl.sendMessage(input);
  }
}

If you have already changed the configuration, you must restore the default parameters:

//  If you have ever change configuration you must restore It
	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;
	Serial.println(c.status.getResponseDescription());
	configuration.ADDL = 0x03;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_TRANSPARENT_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

Transparent transmission and RSSI

Ebyte LoRa E22 device for Arduino, esp32, or esp8266 three devices module SMD

In telecommunications, a received signal strength indicator (RSSI) measures the power present in a received radio signal.

RSSI is usually invisible to a user of a receiving device. However, because signal strength can vary greatly and affect functionality in wireless networking, IEEE 802.11 devices often make the measurement available to users.

This device supports RSSI, and in some situations, It’s very useful. To use It, you must activate the configuration flag.

//  If you have ever change configuration you must restore It
	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;
	Serial.println(c.status.getResponseDescription());
	configuration.ADDL = 0x03;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_TRANSPARENT_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

After configuration, we can go to use the method created to manage the RSSI value: receiveMessageRSSI().

For the transmitter, all the process was managed by configuration; only the receiver must use a “special” method to retrieve the value. So the previous sketch becomes like so:

/*
 * LoRa E22
 * send a transparent message, you must check that the transmitter and receiver have the same
 * CHANNEL ADDL and ADDH
 *
 * Pai attention e22 support RSSI, if you want use that functionality you must enable RSSI on configuration
 * configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 */

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
// LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

  Serial.println("Hi, I'm going to send message!");

  // Send message
  ResponseStatus rs = e22ttl.sendMessage("Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
	ResponseContainer rc = e22ttl.receiveMessageRSSI();
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);

		Serial.print("RSSI: "); Serial.println(rc.rssi, DEC);
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  e22ttl.sendMessage(input);
  }
}

Fixed transmission

For fixed transmission, you must set M0 and M1 to LOW, and It’s better to connect the AUX pin to have a better synchronization.

Fixed transmission: point to point

To use this type of transmission, we must set a parameter on configuration and set a specified address for every device.

LoRa E32 Fixed message to a specified device

So first, we must set M0 to LOW and M1 pin to HIGH to enter on program/sleep mode and set the correct address and fixed transmission flag.

If we want to replicate the condition of the sender in the upper image, we must do this configuration.

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;
	configuration.ADDL = 0x02;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_TRANSMITTER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

Then for the receiver device, we must set this configuration.

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;
	configuration.ADDL = 0x03;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

Now we can send a message to the specified device.

  #define DESTINATION_ADDL 2
  // Send message
  ResponseStatus rs = e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());

The receiver is like the transparent one because the device manages the address and channel.

void loop()
{
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
	ResponseContainer rc = e22ttl.receiveMessage();
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
	}
  }
}

Pay attention to these lines of code:

// With FIXED SENDER configuration
// #define DESTINATION_ADDL 3

// With FIXED RECEIVER configuration
#define DESTINATION_ADDL 2

You must uncomment the correct DESTINATION_ADDL for the sender and the receiver.

Arduino MKR WiFi 1010 on the breadboard with Ebyte LoRa E22

Sender and receive sketch:

/*
 * EBYTE LoRa E22
 * Send a string message to a fixed point ADDH ADDL CHAN 0 2 23
 *
 * Write a string on serial monitor or reset to resend default value.
 *
 * Send a fixed point message, you must check that the transmitter and receiver have different
 * CHANNEL ADDL or ADDH, check down the correct configuration
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 */

// With FIXED SENDER configuration
// #define DESTINATION_ADDL 3

// With FIXED RECEIVER configuration
#define DESTINATION_ADDL 2

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
// LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void printParameters(struct Configuration configuration);

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	// It's important get configuration pointer before all other operation
	Configuration configuration = *(Configuration*) c.data;
	Serial.println(c.status.getResponseDescription());
	Serial.println(c.status.code);

	printParameters(configuration);
	c.close();


  Serial.println("Hi, I'm going to send message!");

  // Send message
  ResponseStatus rs = e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
	ResponseContainer rc = e22ttl.receiveMessage();

	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, input);
  }
}

void printParameters(struct Configuration configuration) {
	Serial.println("----------------------------------------");

	Serial.print(F("HEAD : "));  Serial.print(configuration.COMMAND, HEX);Serial.print(" ");Serial.print(configuration.STARTING_ADDRESS, HEX);Serial.print(" ");Serial.println(configuration.LENGHT, HEX);
	Serial.println(F(" "));
	Serial.print(F("AddH : "));  Serial.println(configuration.ADDH, HEX);
	Serial.print(F("AddL : "));  Serial.println(configuration.ADDL, HEX);
	Serial.print(F("NetID : "));  Serial.println(configuration.NETID, HEX);
	Serial.println(F(" "));
	Serial.print(F("Chan : "));  Serial.print(configuration.CHAN, DEC); Serial.print(" -> "); Serial.println(configuration.getChannelDescription());
	Serial.println(F(" "));
	Serial.print(F("SpeedParityBit     : "));  Serial.print(configuration.SPED.uartParity, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getUARTParityDescription());
	Serial.print(F("SpeedUARTDatte     : "));  Serial.print(configuration.SPED.uartBaudRate, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getUARTBaudRateDescription());
	Serial.print(F("SpeedAirDataRate   : "));  Serial.print(configuration.SPED.airDataRate, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getAirDataRateDescription());
	Serial.println(F(" "));
	Serial.print(F("OptionSubPacketSett: "));  Serial.print(configuration.OPTION.subPacketSetting, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getSubPacketSetting());
	Serial.print(F("OptionTranPower    : "));  Serial.print(configuration.OPTION.transmissionPower, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getTransmissionPowerDescription());
	Serial.print(F("OptionRSSIAmbientNo: "));  Serial.print(configuration.OPTION.RSSIAmbientNoise, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getRSSIAmbientNoiseEnable());
	Serial.println(F(" "));
	Serial.print(F("TransModeWORPeriod : "));  Serial.print(configuration.TRANSMISSION_MODE.WORPeriod, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getWORPeriodByParamsDescription());
	Serial.print(F("TransModeTransContr: "));  Serial.print(configuration.TRANSMISSION_MODE.WORTransceiverControl, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getWORTransceiverControlDescription());
	Serial.print(F("TransModeEnableLBT : "));  Serial.print(configuration.TRANSMISSION_MODE.enableLBT, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getLBTEnableByteDescription());
	Serial.print(F("TransModeEnableRSSI: "));  Serial.print(configuration.TRANSMISSION_MODE.enableRSSI, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getRSSIEnableByteDescription());
	Serial.print(F("TransModeEnabRepeat: "));  Serial.print(configuration.TRANSMISSION_MODE.enableRepeater, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getRepeaterModeEnableByteDescription());
	Serial.print(F("TransModeFixedTrans: "));  Serial.print(configuration.TRANSMISSION_MODE.fixedTransmission, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getFixedTransmissionDescription());


	Serial.println("----------------------------------------");
}

Fixed transmission with RSSI:

Ebyte LoRa E22 device for Arduino, esp32 or esp8266 RSSI signal strength

To manage RSSI, It’s must be enabled via configuration, so the configuration for the sender becomes like this:

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;

	configuration.ADDL = 0x02;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_TRANSMITTER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
	
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

and for the receiver:

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	Configuration configuration = *(Configuration*) c.data;

	configuration.ADDL = 0x03;
	configuration.ADDH = 0x00;
	configuration.NETID = 0x00;

	configuration.CHAN = 23;

	configuration.SPED.uartBaudRate = UART_BPS_9600;
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
	configuration.SPED.uartParity = MODE_00_8N1;

	configuration.OPTION.subPacketSetting = SPS_240_00;
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
	configuration.OPTION.transmissionPower = POWER_22;

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
	configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
	configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
			
	e22ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
    c.close();

Also, in this sketch, pay attention to these lines of code:

// With FIXED SENDER configuration
// #define DESTINATION_ADDL 3

// With FIXED RECEIVER configuration
#define DESTINATION_ADDL 2

You must uncomment the correct DESTINATION_ADDL for the sender and the receiver.

And here is the sketch with RSSI:

/*
 * EBYTE LoRa E22
 * Send a string message to a fixed point ADDH ADDL CHAN 0 2 23
 *
 * Write a string on serial monitor or reset to resend default value.
 *
 * Send a fixed point message, you must check that the transmitter and receiver have different
 * CHANNEL ADDL or ADDH, check down the correct configuration
 *
 * Pai attention e22 support RSSI, if you want use that functionality you must enable RSSI on configuration
 * configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 */

// With FIXED SENDER configuration
// #define DESTINATION_ADDL 3

// With FIXED RECEIVER configuration
#define DESTINATION_ADDL 2

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
// LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void printParameters(struct Configuration configuration);

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

	ResponseStructContainer c;
	c = e22ttl.getConfiguration();
	// It's important get configuration pointer before all other operation
	Configuration configuration = *(Configuration*) c.data;
	Serial.println(c.status.getResponseDescription());
	Serial.println(c.status.code);

	printParameters(configuration);
	c.close();


  Serial.println("Hi, I'm going to send message!");

  // Send message
  ResponseStatus rs = e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
	ResponseContainer rc = e22ttl.receiveMessageRSSI();
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
		Serial.print("RSSI: "); Serial.println(rc.rssi, DEC);
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, input);
  }
}

void printParameters(struct Configuration configuration) {
	Serial.println("----------------------------------------");

	Serial.print(F("HEAD : "));  Serial.print(configuration.COMMAND, HEX);Serial.print(" ");Serial.print(configuration.STARTING_ADDRESS, HEX);Serial.print(" ");Serial.println(configuration.LENGHT, HEX);
	Serial.println(F(" "));
	Serial.print(F("AddH : "));  Serial.println(configuration.ADDH, HEX);
	Serial.print(F("AddL : "));  Serial.println(configuration.ADDL, HEX);
	Serial.print(F("NetID : "));  Serial.println(configuration.NETID, HEX);
	Serial.println(F(" "));
	Serial.print(F("Chan : "));  Serial.print(configuration.CHAN, DEC); Serial.print(" -> "); Serial.println(configuration.getChannelDescription());
	Serial.println(F(" "));
	Serial.print(F("SpeedParityBit     : "));  Serial.print(configuration.SPED.uartParity, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getUARTParityDescription());
	Serial.print(F("SpeedUARTDatte     : "));  Serial.print(configuration.SPED.uartBaudRate, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getUARTBaudRateDescription());
	Serial.print(F("SpeedAirDataRate   : "));  Serial.print(configuration.SPED.airDataRate, BIN);Serial.print(" -> "); Serial.println(configuration.SPED.getAirDataRateDescription());
	Serial.println(F(" "));
	Serial.print(F("OptionSubPacketSett: "));  Serial.print(configuration.OPTION.subPacketSetting, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getSubPacketSetting());
	Serial.print(F("OptionTranPower    : "));  Serial.print(configuration.OPTION.transmissionPower, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getTransmissionPowerDescription());
	Serial.print(F("OptionRSSIAmbientNo: "));  Serial.print(configuration.OPTION.RSSIAmbientNoise, BIN);Serial.print(" -> "); Serial.println(configuration.OPTION.getRSSIAmbientNoiseEnable());
	Serial.println(F(" "));
	Serial.print(F("TransModeWORPeriod : "));  Serial.print(configuration.TRANSMISSION_MODE.WORPeriod, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getWORPeriodByParamsDescription());
	Serial.print(F("TransModeTransContr: "));  Serial.print(configuration.TRANSMISSION_MODE.WORTransceiverControl, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getWORTransceiverControlDescription());
	Serial.print(F("TransModeEnableLBT : "));  Serial.print(configuration.TRANSMISSION_MODE.enableLBT, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getLBTEnableByteDescription());
	Serial.print(F("TransModeEnableRSSI: "));  Serial.print(configuration.TRANSMISSION_MODE.enableRSSI, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getRSSIEnableByteDescription());
	Serial.print(F("TransModeEnabRepeat: "));  Serial.print(configuration.TRANSMISSION_MODE.enableRepeater, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getRepeaterModeEnableByteDescription());
	Serial.print(F("TransModeFixedTrans: "));  Serial.print(configuration.TRANSMISSION_MODE.fixedTransmission, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getFixedTransmissionDescription());


	Serial.println("----------------------------------------");
}

Fixed transmission: broadcast

We can test the broadcast communication with the exact configuration of the address and channel.

Broadcast message to a set of channel devices

To do a test, you can create three devices with these three configurations:

Device 1:

			configuration.ADDL = 0x04;
			configuration.ADDH = 0x00;
			configuration.NETID = 0x00;

			configuration.CHAN = 23;

			configuration.SPED.uartBaudRate = UART_BPS_9600;
			configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
			configuration.SPED.uartParity = MODE_00_8N1;

			configuration.OPTION.subPacketSetting = SPS_240_00;
			configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
			configuration.OPTION.transmissionPower = POWER_22;

			configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
			configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
			configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
			configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
			configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
			configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;

Device 2:

			configuration.ADDL = 0x05;
			configuration.ADDH = 0x00;
			configuration.NETID = 0x00;

			configuration.CHAN = 23;

			configuration.SPED.uartBaudRate = UART_BPS_9600;
			configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
			configuration.SPED.uartParity = MODE_00_8N1;

			configuration.OPTION.subPacketSetting = SPS_240_00;
			configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
			configuration.OPTION.transmissionPower = POWER_22;

			configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
			configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
			configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
			configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
			configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
			configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;

Device 3:

			configuration.ADDL = 0x06;
			configuration.ADDH = 0x00;
			configuration.NETID = 0x00;
	
			configuration.CHAN = 23;
	
			configuration.SPED.uartBaudRate = UART_BPS_9600;
			configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
			configuration.SPED.uartParity = MODE_00_8N1;
	
			configuration.OPTION.subPacketSetting = SPS_240_00;
			configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
			configuration.OPTION.transmissionPower = POWER_22;
	
			configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
			configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
			configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
			configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
			configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
			configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;


  // Send message
  ResponseStatus rs = e22ttl.sendBroadcastFixedMessage(23, "Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());

Or 

  // Send message
  ResponseStatus rs = e22ttl.sendFixedMessage(BROADCAST_ADDRESS, BROADCAST_ADDRESS, 4, "Send message to channel 4");
	Serial.println(rs.getResponseDescription());

The receiver, as described, has the same code because the device manages the preamble with Address and Channel.

Here is the sender sketch:

/*
 * EBYTE LoRa E22
 *
 * Send a string message to the all devices of channel 23
 *
 * Write a string on serial monitor or reset to resend default value.
 *
 * Send a fixed message, you must check that the transmitter and receiver have different
 * CHANNEL ADDL or ADDH, check the configuration down
 *
 * Pai attention e22 support RSSI, if you want use that functionality you must enable RSSI on configuration
 * configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
 *
 * and uncomment #define ENABLE_RSSI true in this sketch
 *
 * You must select 3 devices, and you must use the configuration
 * BROADCAST MESSAGE 1
 * BROADCAST MESSAGE 2
 * BROADCAST MESSAGE 3
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 * E22		  ----- Arduino
 * M0         ----- 7 (or GND)
 * M1         ----- 6 (or GND)
 * RX         ----- 4 (PullUP)
 * TX         ----- 5 (PullUP)
 * AUX        ----- 3  (PullUP)
 * VCC        ----- 3.3v/5v
 * GND        ----- GND
 *
 */

// If you want use RSSI uncomment //#define ENABLE_RSSI true
// and use relative configuration with RSSI enabled
//#define ENABLE_RSSI true

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
// LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

  Serial.println("Hi, I'm going to send message!");

  // Send message
  ResponseStatus rs = e22ttl.sendBroadcastFixedMessage(23, "Hello, world?");
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
#ifdef ENABLE_RSSI
	ResponseContainer rc = e22ttl.receiveMessageRSSI();
#else
	ResponseContainer rc = e22ttl.receiveMessage();
#endif
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
#ifdef ENABLE_RSSI
		Serial.print("RSSI: "); Serial.println(rc.rssi, DEC);
#endif
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  ResponseStatus rs = e22ttl.sendBroadcastFixedMessage(23, input);
	  // Check If there is some problem of succesfully send
	  Serial.println(rs.getResponseDescription());

  }
}

Fixed transmission: monitoring

As you have already seen on the first schema, you can hear all messages in the specified channel, and you must configure your address like so, with an address equal to 0xFFFF.

			configuration.ADDL = BROADCAST_ADDRESS;
			configuration.ADDH = BROADCAST_ADDRESS;
			configuration.NETID = 0x00;

			configuration.CHAN = 23;

			configuration.SPED.uartBaudRate = UART_BPS_9600;
			configuration.SPED.airDataRate = AIR_DATA_RATE_010_24;
			configuration.SPED.uartParity = MODE_00_8N1;

			configuration.OPTION.subPacketSetting = SPS_240_00;
			configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
			configuration.OPTION.transmissionPower = POWER_22;

			configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
			configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
			configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
			configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
			configuration.TRANSMISSION_MODE.WORTransceiverControl = WOR_RECEIVER;
			configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;

To receive the messages:

/*
 * EBYTE LoRa E22
 *
 * Write a string on serial monitor or reset to resend default value.
 *
 * Send a fixed message, you must check that the transmitter and receiver have different
 * CHANNEL ADDL or ADDH, check the configuration down
 *
 * Pai attention e22 support RSSI, if you want use that functionality you must enable RSSI on configuration
 * configuration.TRANSMISSION_MODE.enableRSSI = RSSI_ENABLED;
 *
 * and uncomment #define ENABLE_RSSI true in this sketch
 *
 * Renzo Mischianti <https://mischianti.org>
 * https://mischianti.org/category/my-libraries/ebyte-lora-e22-devices/
 *
 * E22		  ----- Arduino
 * M0         ----- 7 (or GND)
 * M1         ----- 6 (or GND)
 * RX         ----- 4 (PullUP)
 * TX         ----- 5 (PullUP)
 * AUX        ----- 3  (PullUP)
 * VCC        ----- 3.3v/5v
 * GND        ----- GND
 *
 */

#define DESTINATION_ADDL 3

// If you want use RSSI uncomment //#define ENABLE_RSSI true
// and use relative configuration with RSSI enabled
//#define ENABLE_RSSI true

#include "Arduino.h"
#include "LoRa_E22.h"

// ---------- esp8266 pins --------------
//LoRa_E22 e22ttl(RX, TX, AUX, M0, M1);  // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
// LoRa_E22 e22ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(D2, D3); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------

// ---------- Arduino pins --------------
LoRa_E22 e22ttl(4, 5, 3, 7, 6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX AUX M0 M1
//LoRa_E22 e22ttl(4, 5); // Config without connect AUX and M0 M1

//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
//LoRa_E22 e22ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------

// ------------- Arduino Nano 33 IoT -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E22 e22ttl(&Serial1, 2, 4, 6); //  RX AUX M0 M1
// -------------------------------------------------

// ---------- esp32 pins --------------
//LoRa_E22 e22ttl(&Serial2, 18, 21, 19); //  RX AUX M0 M1

//LoRa_E22 e22ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); //  esp32 RX <-- e22 TX, esp32 TX --> e22 RX AUX M0 M1
// -------------------------------------

void setup() {
  Serial.begin(9600);
  delay(500);

  // Startup all pins and UART
  e22ttl.begin();

//  Serial.println("Hi, I'm going to send message!");
//
//  // Send message
//  ResponseStatus rs = e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");
//  // Check If there is some problem of succesfully send
//  Serial.println(rs.getResponseDescription());
}

void loop() {
	// If something available
  if (e22ttl.available()>1) {
	  // read the String message
#ifdef ENABLE_RSSI
	ResponseContainer rc = e22ttl.receiveMessageRSSI();
#else
	ResponseContainer rc = e22ttl.receiveMessage();
#endif
	// Is something goes wrong print error
	if (rc.status.code!=1){
		Serial.println(rc.status.getResponseDescription());
	}else{
		// Print the data received
		Serial.println(rc.status.getResponseDescription());
		Serial.println(rc.data);
#ifdef ENABLE_RSSI
		Serial.print("RSSI: "); Serial.println(rc.rssi, DEC);
#endif
	}
  }
  if (Serial.available()) {
	  String input = Serial.readString();
	  e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, input);
  }
}

Thanks

  1. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: settings and basic usage
  2. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: library
  3. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: configuration
  4. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: fixed transmission, broadcast, monitor, and RSSI
  5. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: power-saving and sending structured data
  6. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: repeater mode and remote settings
  7. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: WOR microcontroller and Arduino shield
  8. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: WOR microcontroller and WeMos D1 shield
  9. Ebyte LoRa E22 device for Arduino, esp32 or esp8266: WOR microcontroller and esp32 dev v1 shield

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