We will now understand the various transmission types of our Ebyte E220 UART LoRa device based on LLCC68 Wireless Modules.
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.
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.
| M0 | GND (Set normal mode) |
| M1 | GND (Set normal mode) |
| TX | PIN 2 (PullUP 4,7KΩ) |
| RX | PIN 3 (PullUP 4,7KΩ & Voltage divider) |
| AUX | Not connected (PullUP 4,7KΩ) |
| VCC | 5v |
| GND | GND |
and this configuration for Wemos D1 mini:
| M0 | GND (Set normal mode) |
| M1 | GND (Set normal mode) |
| TX | PIN D2 (PullUP 4,7KΩ) |
| RX | PIN D3 (PullUP 4,7KΩ) |
| AUX | Not connected (PullUP 4,7KΩ) |
| VCC | 3.3v/5v |
| GND | GND |
ESP-32:
| M0 | GND (Set normal mode) |
| M1 | GND (Set normal mode) |
| RX | TX2 (PullUP 4,7KΩ) |
| TX | RX2 (PullUP 4,7KΩ) |
| AUX | Not connected (PullUP 4,7KΩ) |
| VCC | 3.3v/5v |
| GND | GND |
Arduino MKR WiFi 1010:
| M0 | GND (Set normal mode) |
| M1 | GND (Set normal mode) |
| TX | PIN 14 Tx (PullUP 4,7KΩ) |
| RX | PIN 13 Rx (PullUP 4,7KΩ) |
| AUX | Not connected (PullUP 4,7KΩ) |
| VCC | 3.3v/5v |
| GND | GND |
So you must only instantiate the correct constructor.
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
Transparent transmission
Generic sketch, select the correct constructor for every device:
/*
* EBYTE LoRa E220
* send a transparent message, you must check that the transmitter and receiver have the same
* CHANNEL ADDL and ADDH
*
* You must uncommend the correct constructor.
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or GND) ----- 19 (or GND) ----- 2 (or GND) ----- 2 (or GND) ----- 7 Volt div (or GND)
* M1 ----- D6 (or GND) ----- 21 (or GND) ----- 4 (or GND) ----- 4 (or GND) ----- 6 Volt div (or GND)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- GND ----- GND
*
*/
#define ENABLE_RSSI true
#include "Arduino.h"
#include "LoRa_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
// If you have ever change configuration you must restore It
Serial.println("Hi, I'm going to send message!");
// Send message
ResponseStatus rs = e220ttl.sendMessage("Hello, world?");
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
}
void loop() {
// If something available
if (e220ttl.available()>1) {
// read the String message
ResponseContainer rc = e220ttl.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();
e220ttl.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 = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
Serial.println(c.status.getResponseDescription());
configuration.ADDL = 0x03; // First part of address
configuration.ADDH = 0x00; // Second part
configuration.CHAN = 23; // Communication channel
configuration.SPED.uartBaudRate = UART_BPS_9600; // Serial baud rate
configuration.SPED.airDataRate = AIR_DATA_RATE_010_24; // Air baud rate
configuration.SPED.uartParity = MODE_00_8N1; // Parity bit
configuration.OPTION.subPacketSetting = SPS_200_00; // Packet size
configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED; // Need to send special command
configuration.OPTION.transmissionPower = POWER_22; // Device power
configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED; // Enable RSSI info
configuration.TRANSMISSION_MODE.fixedTransmission = FT_TRANSPARENT_TRANSMISSION; // Enable repeater mode
configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED; // Check interference
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011; // WOR timing
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
Transparent transmission and RSSI
A received signal strength indicator (RSSI) measures the power present in a received radio signal in telecommunications.
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 = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
Serial.println(c.status.getResponseDescription());
configuration.ADDL = 0x03;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.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:
/*
* EBYTE LoRa E220
* send a transparent message, you must check that the transmitter and receiver have the same
* CHANNEL ADDL and ADDH
*
* You must uncommend the correct constructor.
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or GND) ----- 19 (or GND) ----- 2 (or GND) ----- 2 (or GND) ----- 7 Volt div (or GND)
* M1 ----- D6 (or GND) ----- 21 (or GND) ----- 4 (or GND) ----- 4 (or GND) ----- 6 Volt div (or GND)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- GND ----- GND
*
*/
#define ENABLE_RSSI true
#include "Arduino.h"
#include "LoRa_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
// If you have ever change configuration you must restore It
Serial.println("Hi, I'm going to send message!");
// Send message
ResponseStatus rs = e220ttl.sendMessage("Hello, world?");
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
}
void loop() {
// If something available
if (e220ttl.available()>1) {
// read the String message
ResponseContainer rc = e220ttl.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();
e220ttl.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.
So first, we must set M0 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 = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x02;
configuration.ADDH = 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_200_00;
configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_ENABLED;
configuration.OPTION.transmissionPower = POWER_22;
configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
configuration.TRANSMISSION_MODE.fixedTransmission = FT_FIXED_TRANSMISSION;
configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
Then for the receiver device, we must set this configuration.
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x03;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.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 = e220ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
The receiver code is like the transparent one because the device manages the address and channel.
void loop()
{
// If something available
if (e220ttl.available()>1) {
// read the String message
ResponseContainer rc = e220ttl.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.
Sender and receive sketch, uncomment the right constructor relative to your device:
/*
* EBYTE LoRa E220
* Send a string message to a fixed point ADDH ADDL CHAN
*
* You must configure 2 device: one as SENDER (with FIXED SENDER config) and uncomment the relative
* define with the correct DESTINATION_ADDL, and one as RECEIVER (with FIXED RECEIVER config)
* and uncomment the relative define with the correct DESTINATION_ADDL.
*
* Write a string on serial monitor or reset to resend default value.
*
*
* You must uncommend the correct constructor.
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or 3.3v) ----- 19 (or 3.3v) ----- 2 (or 3.3v) ----- 2 (or 3.3v) ----- 7 Volt div (or 3.3v)
* M1 ----- D6 (or 3.3v) ----- 21 (or 3.3v) ----- 4 (or 3.3v) ----- 4 (or 3.3v) ----- 6 Volt div (or 3.3v)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- GND ----- GND
*
*/
// With FIXED SENDER configuration
#define DESTINATION_ADDL 3
// With FIXED RECEIVER configuration
//#define DESTINATION_ADDL 2
#include "Arduino.h"
#include "LoRa_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
//LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void printParameters(struct Configuration configuration);
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
ResponseStructContainer c;
c = e220ttl.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 = e220ttl.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 (e220ttl.available()>1) {
// read the String message
ResponseContainer rc = e220ttl.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();
ResponseStatus rs = e220ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, input);
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
}
}
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.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("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("TransModeFixedTrans: ")); Serial.print(configuration.TRANSMISSION_MODE.fixedTransmission, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getFixedTransmissionDescription());
Serial.println("----------------------------------------");
}
Fixed transmission with RSSI:
To manage RSSI, It’s must be enabled via configuration, so the configuration for the sender becomes like this:
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x02;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
and for receiver:
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x03;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.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 E220
* Send a string message to a fixed point ADDH ADDL CHAN
*
* You must configure 2 device: one as SENDER (with FIXED SENDER config) and uncomment the relative
* define with the correct DESTINATION_ADDL, and one as RECEIVER (with FIXED RECEIVER config)
* and uncomment the relative define with the correct DESTINATION_ADDL.
*
* Write a string on serial monitor or reset to resend default value.
*
* You must uncommend the correct constructor.
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or 3.3v) ----- 19 (or 3.3v) ----- 2 (or 3.3v) ----- 2 (or 3.3v) ----- 7 Volt div (or 3.3v)
* M1 ----- D6 (or 3.3v) ----- 21 (or 3.3v) ----- 4 (or 3.3v) ----- 4 (or 3.3v) ----- 6 Volt div (or 3.3v)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- GND ----- GND
*
*/
// With FIXED SENDER configuration
// #define DESTINATION_ADDL 3
// With FIXED RECEIVER configuration
#define DESTINATION_ADDL 2
#include "Arduino.h"
#include "LoRa_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
//LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino Nano 33 IoT -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void printParameters(struct Configuration configuration);
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
ResponseStructContainer c;
c = e220ttl.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 = e220ttl.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 (e220ttl.available()>1) {
// read the String message
ResponseContainer rc = e220ttl.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();
ResponseStatus rs = e220ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, input);
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
}
}
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.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("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("TransModeFixedTrans: ")); Serial.print(configuration.TRANSMISSION_MODE.fixedTransmission, BIN);Serial.print(" -> "); Serial.println(configuration.TRANSMISSION_MODE.getFixedTransmissionDescription());
Serial.println("----------------------------------------");
}
Fixed transmisison: broadcast
We can test the broadcast communication with the exact configuration of the address and channel.
To do a test, you can create three devices with these three configurations:
Device 1:
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x04;
configuration.ADDH = 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_200_00;
configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED;
configuration.OPTION.transmissionPower = POWER_22;
configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED;
configuration.TRANSMISSION_MODE.enableRepeater = REPEATER_DISABLED;
configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
Device 2:
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x05;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
Device 3:
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = 0x06;
configuration.ADDH = 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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
You can use these methods:
// Send message
ResponseStatus rs = e220ttl.sendBroadcastFixedMessage(23, "Hello, world?");
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
Or
// Send message
ResponseStatus rs = e220ttl.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 E220
*
* Send a string message to all devices of the Channel CHAN 23
*
* Write a string on serial monitor or reset to send the string to all device on channel 23.
*
* Send a fixed message, you must check that the transmitter and receiver have different
* ADDL or ADDH, check the configuration down
*
* For the test you can use
* - BROADCAST MESSAGE 1
* - BROADCAST MESSAGE 2
* - BROADCAST MESSAGE 3
*
* Pai attention e220 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
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or 3.3v) ----- 19 (or 3.3v) ----- 2 (or 3.3v) ----- 2 (or 3.3v) ----- 7 Volt div (or 3.3v)
* M1 ----- D6 (or 3.3v) ----- 21 (or 3.3v) ----- 4 (or 3.3v) ----- 4 (or 3.3v) ----- 6 Volt div (or 3.3v)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- 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_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
//LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino Nano 33 IoT -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
Serial.println("Hi, I'm going to send message!");
// Send message
ResponseStatus rs = e220ttl.sendBroadcastFixedMessage(23, "Hello, world?");
// Check If there is some problem of succesfully send
Serial.println(rs.getResponseDescription());
}
void loop() {
// If something available
if (e220ttl.available()>1) {
// read the String message
#ifdef ENABLE_RSSI
ResponseContainer rc = e220ttl.receiveMessageRSSI();
#else
ResponseContainer rc = e220ttl.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 = e220ttl.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.
ResponseStructContainer c;
c = e220ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
configuration.ADDL = BROADCAST_ADDRESS;
configuration.ADDH = BROADCAST_ADDRESS;
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_200_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.enableLBT = LBT_DISABLED;
configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011;
e220ttl.setConfiguration(configuration, WRITE_CFG_PWR_DWN_SAVE);
c.close();
To receive the messages:
/*
* EBYTE LoRa E220
*
* Receive messages on CHANNEL 23
* Uncomment #define ENABLE_RSSI true in this sketch
* if the sender send RSSI also
*
* by Renzo Mischianti <https://mischianti.org>
*
* https://mischianti.org
*
* E220 ----- WeMos D1 mini ----- esp32 ----- Arduino Nano 33 IoT ----- Arduino MKR ----- ArduinoUNO
* M0 ----- D7 (or 3.3v) ----- 19 (or 3.3v) ----- 2 (or 3.3v) ----- 2 (or 3.3v) ----- 7 Volt div (or 3.3v)
* M1 ----- D6 (or 3.3v) ----- 21 (or 3.3v) ----- 4 (or 3.3v) ----- 4 (or 3.3v) ----- 6 Volt div (or 3.3v)
* TX ----- D3 (PullUP) ----- TX2 (PullUP) ----- TX1 (PullUP) ----- 14 (PullUP) ----- 4 (PullUP)
* RX ----- D4 (PullUP) ----- RX2 (PullUP) ----- RX1 (PullUP) ----- 13 (PullUP) ----- 5 Volt div (PullUP)
* AUX ----- D5 (PullUP) ----- 18 (PullUP) ----- 0 (PullUP) ----- 0 (PullUP) ----- 3 (PullUP)
* VCC ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v ----- 3.3v/5v
* GND ----- GND ----- GND ----- GND ----- GND ----- GND
*
*/
// If you want use RSSI uncomment
//#define ENABLE_RSSI true
#include "Arduino.h"
#include "LoRa_E220.h"
// ---------- esp8266 pins --------------
//LoRa_E220 e220ttl(RX, TX, AUX, M0, M1); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
LoRa_E220 e220ttl(D3, D4, D5, D7, D6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(D2, D3); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(D2, D3); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, D5, D7, D6); // AUX M0 M1
// -------------------------------------
// ---------- Arduino pins --------------
//LoRa_E220 e220ttl(4, 5, 3, 7, 6); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX AUX M0 M1
//LoRa_E220 e220ttl(4, 5); // Config without connect AUX and M0 M1
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(4, 5); // Arduino RX <-- e220 TX, Arduino TX --> e220 RX
//LoRa_E220 e220ttl(&mySerial, 3, 7, 6); // AUX M0 M1
// -------------------------------------
// ------------- Arduino Nano 33 IoT -------------
// LoRa_E220 e220ttl(&Serial1, 2, 4, 6); // RX AUX M0 M1
// -------------------------------------------------
// ------------- Arduino MKR WiFi 1010 -------------
// LoRa_E220 e220ttl(&Serial1, 0, 2, 4); // RX AUX M0 M1
// -------------------------------------------------
// ---------- esp32 pins --------------
// LoRa_E220 e220ttl(&Serial2, 15, 21, 19); // RX AUX M0 M1
//LoRa_E220 e220ttl(&Serial2, 22, 4, 18, 21, 19, UART_BPS_RATE_9600); // esp32 RX <-- e220 TX, esp32 TX --> e220 RX AUX M0 M1
// -------------------------------------
void setup() {
Serial.begin(9600);
delay(500);
// Startup all pins and UART
e220ttl.begin();
Serial.println("Start receiving!");
}
void loop() {
// If something available
if (e220ttl.available()>1) {
Serial.println("Message received!");
// read the String message
#ifdef ENABLE_RSSI
ResponseContainer rc = e220ttl.receiveMessageRSSI();
#else
ResponseContainer rc = e220ttl.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
}
}
}
Thanks
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: settings and basic usage
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: library
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: configuration
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: fixed transmission, broadcast, monitor, and RSSI
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: power-saving and sending structured data
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: WOR microcontroller and Arduino shield
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: WOR microcontroller and WeMos D1 shield
- Ebyte LoRa E220 device for Arduino, esp32 or esp8266: WOR microcontroller and esp32 dev v1 shield
- Mischianti Arduino LoRa shield (Open source)
- Mischianti WeMos LoRa shield (Open source)
- Mischianti ESP32 DOIT DEV KIT v1 shield (Open source)