M005

        LoRa Module for ESP32 DIY Development Kit SKU: M005 LoRa integrated LoRa Module Ra-02, designed and produced by Ai-Thinker. On the board has some extra space left over, so we give you a prototyping area, it's great for adding on your customized circult working with the LoRa Module. LoRa enables long-range transmissions (more than 10 km in rural areas) with low power consumption，The technology is presented in two parts: LoRa, the physical layer and LoRaWAN (Long Range Wide Area Network), the upper layers. LoRa and LoRaWAN permit long-range connectivity for Internet of Things (IoT) devices in different types of industries. Product Features           Lora Module: Ra-02 (by Ai-Thinker) Series Communication Protocol: SPI Universal Perboard Working Frequency: 433 MHz Supports FSK, GFSK, MSK, GMSK, LoRa ™ and OOK modulation modes Receive sensitivity: lowest to -141 dBm Programmable bit rate up to 300Kbps Build-in PCB Antenna External Antenna port Program platform: Arduino, Mrcropython, UIFlow(Blockly) Kit includes  1x M5Stack LoRa Module Applications    Automatic meter reading Home building automation Remote irrigation system   Example Arduino IDE These are the point-to-point communication examples between two LORA modules. The LoRa nodes send and receive messages.  Blue string indicates send succeed.  Yellow string display the received messages.  Red string indicates initialization failed. To get complete code, please click here #include   #include     //declaration  String outgoing;                     // outgoing message  byte msgCount = 0;                   // count of outgoing messages  byte localAddress = 0xBB;            // address of this device  byte destination = 0xFF;             // destination to send to    //initialization  M5.begin();  LoRa.setPins();                      // set CS, reset, IRQ pin  LoRa.begin(433E6);                   // initialize ratio at 915 MHz    //send message  void sendMessage(String outgoing) {    LoRa.beginPacket();                // start packet    LoRa.write(destination);           // add destination address    LoRa.write(localAddress);          // add sender address    LoRa.write(msgCount);              // add message ID    LoRa.write(outgoing.length());     // add payload length    LoRa.print(outgoing);              // add payload    LoRa.endPacket();                  // finish packet and send it    msgCount++;                        // increment message ID  }    //receive message  void onReceive(int packetSize) {    if (packetSize == 0) return;       // if there's no packet, return    int recipient = LoRa.read();       // recipient address    byte sender = LoRa.read();         // sender address    byte incomingMsgId = LoRa.read();  // incoming msg ID    byte incomingLength = LoRa.read(); // incoming msg length      String incoming = "";      while (LoRa.available()) {      incoming += (char)LoRa.read();    }  }    onReceive(LoRa.parsePacket());  Schematic     https://m5stack.com/products/lora‐module/10‐2‐19