E220-900T22D getConfiguration

[matejt]

Hi,

I have started experimenting with LORA modules which I have purchased on Aliexpress.

I’m using FireBeetle 2 ESP32-E IoT as microcontroller and it is impossible to obtain configuration. from both purchased modules.

So far I have tried:
1) Different ESP32s
2) Powering module out of 5V (4.5V actually)
3) removed pull-up resistors
4) with/without AUX

Wiring (module – ESP)
M0 – Ground
M1 – Ground
RX – pin 17 TX + behind 4.7k ohm resistor connected to 3.3V
TX – pin 16 RX + behind 4.7k ohm resistor connected to 3.3V
AUX – pin 25 + behind 4.7k ohm resistor connected to 3.3V
VCC – 5V
Ground – Ground

On board pins I can measure specified voltages.

My code:

/*
 * LoRa E220 LLCC68
 * Get configuration.
 * http://mischianti.org
 *
 * E220       ----- Arduino MKR
 * M0         ----- 2 (or GND)
 * M1         ----- 3 (or GND)
 * RX         ----- 14 (PullUP)
 * TX         ----- 13 (PullUP)
 * AUX        ----- 1  (PullUP)
 * VCC        ----- 3.3v/5v
 * GND        ----- GND
 *
 */
#include "Arduino.h"
#include "EByte_LoRa_E220_library.h"
 
// ---------- esp32 pins --------------
 LoRa_E220 e220ttl(&Serial2, 25, UART_BPS_RATE_9600); //  RX AUX M0 M1

 
void printParameters(struct Configuration configuration);
void printModuleInformation(struct ModuleInformation moduleInformation);
 
void setup() {
    Serial.begin(115200);
    while(!Serial){};
    delay(2500);
 
    Serial.println();
 
 
    // 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);
 
    ResponseStructContainer cMi;
    cMi = e220ttl.getModuleInformation();
    // It's important get information pointer before all other operation
    ModuleInformation mi = *(ModuleInformation*)cMi.data;
 
    Serial.println(cMi.status.getResponseDescription());
    Serial.println(cMi.status.code);
 
    printModuleInformation(mi);
    c.close();
}
 
void loop() {
 
}
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("----------------------------------------");
}
void printModuleInformation(struct ModuleInformation moduleInformation) {
    Serial.println("----------------------------------------");
    Serial.print(F("HEAD: "));  Serial.print(moduleInformation.COMMAND, HEX);Serial.print(" ");Serial.print(moduleInformation.STARTING_ADDRESS, HEX);Serial.print(" ");Serial.println(moduleInformation.LENGHT, DEC);
 
    Serial.print(F("Model no.: "));  Serial.println(moduleInformation.model, HEX);
    Serial.print(F("Version  : "));  Serial.println(moduleInformation.version, HEX);
    Serial.print(F("Features : "));  Serial.println(moduleInformation.features, HEX);
    Serial.println("----------------------------------------");
 
}

Output:

No response from device! (Check wiring)
12
----------------------------------------
HEAD : 12 D0 FC
 
AddH : 8D
AddL : EF
 
Chan : 219 -> 629MHz
 
SpeedParityBit     : 10 -> 8E1
SpeedUARTDatte     : 11 -> 9600bps (default)
SpeedAirDataRate   : 1 -> 2.4kbps
 
OptionSubPacketSett: 0 -> 200bytes (default)
OptionTranPower    : 10 -> 13dBm
OptionRSSIAmbientNo: 1 -> Enabled
 
TransModeWORPeriod : 111 -> 4000ms
TransModeEnableLBT : 0 -> Disabled (default)
TransModeEnableRSSI: 0 -> Disabled (default)
TransModeFixedTrans: 0 -> Transparent transmission (default)
----------------------------------------
No response from device! (Check wiring)
12
----------------------------------------
HEAD: 54 72 97
Model no.: 6E
Version  : 73
Features : 70
----------------------------------------

[Renzo Mischianti]

Hi Matejt,
I check your code, and there is an error, M0 and M1 must be HIGH, not LOW.

If you get this example from the site, please, tell me where because I must fix It.

Bye Renzo

[Renzo Mischianti]

Hi Matejt,
I check your code, and there is an error, M0 and M1 must be HIGH, not LOW.

If you get this example from the site, please, tell me where because I must fix It.

Bye Renzo

[matejt]

Hi Renzo,

thank you for your quick answer!

I think it was incorrect copy paste, but I think description here is incorrect. Particularly chapter Fixed transmission “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.” Based on documentation it should be M0 + M1 on HIGH.

As you suggested I have updated wiring for module programming. Everything was working, but afterwards I have started playing with RSSI. From response container I was just able to print out RSSI value, but not anymore rc.data (always blank).

Due to that I have started playing with modules and it seems I have somehow f*cked it up.
So I have started from scratch (transparent transmission config upload, transparent transmission example, M0 + M1 on LOW, AUX connected).

Code example

#include "Arduino.h"
#include "EByte_LoRa_E220_library.h"
#define FREQUENCY_868 <- with our without
 
// ---------- esp32 pins --------------
LoRa_E220 e220ttl(&Serial2, 25, UART_BPS_RATE_9600); //  RX AUX M0 M1

void setup() {
  Serial.begin(9600);
  delay(5000);
 
  Serial.println("Hi, I'm going to send message!");
 
  // Startup all pins and UART
  e220ttl.begin();
 
  // Send message
  ResponseStatus rs = e220ttl.sendMessage("Hello, world?");
  // Check If there is some problem of successfully 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){
        rc.status.getResponseDescription();
    }else{
        // Print the data received
        Serial.println(rc.data);
    }
  }
  if (Serial.available()) {
      String input = Serial.readString();
      ResponseStatus rs = e220ttl.sendMessage(input);
      Serial.println("Response :"  +  rs.getResponseDescription());
  }
} 

It is running on identical ESPs with identical wiring.
I’m just curious regarding one thing. As M0 + M1 is on LOW, I assume I can not get correct configuration, right?

I’m asking due to

HEAD : 2 E5 DA
 
AddH : EB
AddL : D2
 
Chan : 0 -> 862MHz

Thank you in advance!

[Renzo Mischianti]

Hi Matejet,
yes, It’s correct; if you don’t connect all the pins (M0 and M1 in particular), you can’t switch to a different mode.
So, you can do a single operation with a single configuration of M0 and M1.
Bye Renzo

[Author]

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