ESP8266（Node MCU）与LoRa(E22 SX1268)通信

小魔兽嘎嘎飞

已于 2025-04-15 19:45:18 修改

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CC 4.0 BY-SA版权

文章标签：嵌入式硬件 vscode c++ 单片机

于 2024-01-18 12:17:11 首次发布

本文链接：https://blog.youkuaiyun.com/Holy_ShiFt/article/details/135670729

本文主要是点到点通信。

吐槽一下---- ESP8266的串口真是个麻烦事

自己试过网上的一些代码发现通信不了

用的lora库是github上大神的：xreef/EByte_LoRa_E22_Series_Library: Arduino LoRa EBYTE E22 device library complete and tested with Arduino, esp8266, esp32, STM32 and Raspberry Pi Pico (rp2040 boards).. sx1262/sx1268 (github.com)https://github.com/xreef/EByte_LoRa_E22_Series_Library

他里面的代码没有完整的放在一起，我也是尝试调试被折磨了好几天(就是收不到数据)，有时候发送端的NodeMCU什么都不连都能显示发送成功(Success!).....具体为啥我也不知道。

主要是NodeMCU的接线。

本代码中，E22的Tx接D5，Rx接D6。

SoftwareSerial mySerial(D5, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
LoRa_E22 e22ttl(&mySerial, D7, D0, D1); // AUX M0 M1

AUX接D7(不接应该也行)，M0和M1接D0和D1，然后VCC和GND。

直接上完整代码！

切换一下role的值就可以分别烧录发送端和接收端了。

// With FIXED SENDER configuration  发送端烧录的时候打开
#define DESTINATION_ADDL 3
 
// With FIXED RECEIVER configuration   不双向通信不用管
// #define DESTINATION_ADDL 2
 
#include "Arduino.h"
#include "LoRa_E22.h"
 
 
//#include <SoftwareSerial.h>
SoftwareSerial mySerial(D5, D6); // Arduino RX <-- e22 TX, Arduino TX --> e22 RX
LoRa_E22 e22ttl(&mySerial, D7, D0, D1); // AUX M0 M1

bool role = false ; // T --true, R --false
 
void printParameters(struct Configuration configuration);

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

  e22ttl.begin();

ResponseStructContainer c;
c = e22ttl.getConfiguration();
Configuration configuration = *(Configuration*) c.data;
//Sender
if(role){
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);
}
else{
//Receiver
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);

}

  // Startup all pins and UART
 
    Serial.println(c.status.getResponseDescription());
    Serial.println(c.status.code);
 
    printParameters(configuration);
    //c.close();
 
 
  Serial.println("Hi, I'm going to send message!"); //  没用
 
  // Send message
  ResponseStatus rs = e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "Hello, world?");  //没用
  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription()); // 什么鬼
}
 
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()) {
    if(role){
      String input = Serial.readString();
      e22ttl.sendFixedMessage(0, DESTINATION_ADDL, 23, "123456");
    }
  // }
}
 
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("----------------------------------------");
}

2024.1.20日补充：由于Serial.readString(); 的影响，1s只发1个包，可以自己尝试更改代码。

2024.1.28日补充：发送很快的时候，接收端好像收不过来，接收端代码会卡死在一个死循环。