通讯LoRa

Question

我有两个LoRa模块，发射器是E32-900T20D（带ESP32 DevKitC V4），接收器是LoRa32U4。问题是接收器没有从发射器接收到任何东西。这是发射器的代码：

#include "LoRa_E32.h"

LoRa_E32 e32ttl100(&Serial2,UART_BPS_RATE_9600 ); 

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

  // Startup all pins and UART
  e32ttl100.begin();

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

  // Send first message
  ResponseStatus rs = e32ttl100.sendMessage("Hello, world?");
  // Check if message was sent successfully
  if (rs.code == 1) {
    Serial.println("Message sent successfully");
  } else {
    Serial.println("Failed to send message");
  }
}

void loop() {
  delay(2000); 
  
  // Send message
  ResponseStatus rs = e32ttl100.sendMessage("Hello, world?");
  // Check if message was sent successfully
  if (rs.code == 1) {
    Serial.println("Message sent successfully");
  } else {
    Serial.println("Failed to send message");
  }
}

这是发射器的结果：

Message sent successfully
Message sent successfully
Message sent successfully 

这是接收器的代码：

#include <LoRa.h>

#define ss 8
#define reset 4
#define dio0 7

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

  LoRa.setPins(ss, reset, dio0);
  if (!LoRa.begin(868E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  // Set signal bandwidth to 125kHz
  LoRa.setSignalBandwidth(125E3);

  // Set TX power to 20dBm
  LoRa.setTxPower(20);

  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, HIGH);
}

void loop() {
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    // received a packet
    Serial.print("Received packet with RSSI ");
    Serial.print(LoRa.packetRssi());
    Serial.print(": ");

    while (LoRa.available()) {
      Serial.write(LoRa.read());
    }

    digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
  }
}

知道两者都配置为频率 868 Mhz

问题是什么？请帮忙

Answer 1

UART 管理的 Ebyte 模块并不是真正的 LoRa 设备。它们的设置与常规 LoRa 模块的设置不匹配。我一直怀疑他们使用的是FSK传输而不是LoRa。要么完全留在 Ebyte 生态系统内，要么退出。不要混合非 Ebyte 和 Ebyte 模块，因为如果你这样做，你将确保的只是痛苦。