Init fork from Stuart Robinson's repo

examples/SX128x_examples/Reliable/207_Reliable_SXTransmitter_Controller/207_Reliable_SXTransmitter_Controller.ino

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+/*******************************************************************************************************
+  Programs for Arduino - Copyright of the author Stuart Robinson - 13/09/21
+
+  This program is supplied as is, it is up to the user of the program to decide if the program is
+  suitable for the intended purpose and free from errors.
+*******************************************************************************************************/
+
+
+/*******************************************************************************************************
+  Program Operation - This is a basic demonstration of the transmission of a 'Reliable' packet used to
+  control outputs on a remote receiver.
+
+  A reliable packet has 4 bytes automatically appended to the end of the buffer\array that is the data
+  payload. The first two bytes appended are a 16bit 'NetworkID'. This receiver needs to have the same
+  NetworkID as configured for the transmitter. The receiver program uses the NetworkID to check that
+  the received packet is from a known source.  The third and fourth bytes appended are a 16 bit CRC of
+  the payload. The receiver will carry out its own CRC check on the received payload and can then verify
+  this against the CRC appended to the packet. The receiver is thus able to check if the payload is valid.
+
+  For a packet to be accepted by the receiver, the networkID and payload CRC appended to the packet by the
+  transmitter need to match those from the receiver which gives a high level of assurance that the packet
+  is valid.
+
+  This example program and the matching receiver, 208_Reliable_SXReceiver_Controller writes a series
+  of variables direct into the LoRa devices internal buffer, it is not necessary to write variables to a
+  memory array first. The receiver then reads the matching variables direct from the LoRa devices buffer and
+  these variables contain the control information to flash a LED attached to the receiver on and off.
+
+  Serial monitor baud rate should be set at 115200.
+*******************************************************************************************************/
+
+#include <SPI.h>                                //the LoRa device is SPI based so load the SPI library                                         
+#include <SX128XLT.h>                           //include the appropriate library  
+
+SX128XLT LT;                                    //create a library class instance called LT
+
+#define NSS 10                                  //select pin on LoRa device
+#define NRESET 9                                //reset pin on LoRa device
+#define RFBUSY 7                                //busy pin on LoRa device 
+#define DIO1 3                                  //DIO1 pin on LoRa device, used for sensing RX and TX done 
+#define LED1 8                                  //this is output 1
+#define LORA_DEVICE DEVICE_SX1280               //we need to define the device we are using
+#define TXpower 2                               //LoRa transmit power in dBm
+
+#define TXtimeout 1000                          //transmit timeout in mS. If 0 return from transmit function after send.  
+
+uint8_t TXPacketL;
+uint8_t TXPayloadL;                             //this is the payload length sent
+uint16_t PayloadCRC;
+
+const uint16_t NetworkID = 0x3210;              //NetworkID identifies this connection, needs to match value in receiver
+
+uint16_t destinationNode = 2;                   //node number we are controlling, 0 to 65535
+uint8_t outputNumber = 1;                       //output number on node we are controlling
+uint8_t onoroff = 0;                            //set to 0 to set remote output off, 1 to set it on
+uint8_t startaddr = 0;                          //address in SX buffer to start packet
+
+
+void loop()
+{
+  LT.startWriteSXBuffer(startaddr);             //start the write at SX12XX internal buffer location startaddr
+  LT.writeUint16(destinationNode);              //destination node for packet
+  LT.writeUint8(outputNumber);                  //output number on receiver
+  LT.writeUint8(onoroff);                       //0 for off, 1 for on
+  TXPayloadL = LT.endWriteSXBuffer();           //closes packet write and returns the length of the payload to send
+
+  Serial.print(F("Transmit SX buffer > "));
+  LT.printSXBufferHEX(startaddr, TXPayloadL + startaddr - 1);       //print the sent SX array as HEX
+  Serial.println();
+  Serial.flush();
+
+  //now transmit the packet
+  digitalWrite(LED1, HIGH);
+  TXPacketL = LT.transmitSXReliable(startaddr, TXPayloadL, NetworkID, TXtimeout, TXpower, WAIT_TX);  //will return packet length > 0 if sent OK, otherwise 0 if transmit error
+
+  if (TXPacketL > 0)
+  {
+    //if transmitReliable() returns > 0 then transmit was OK
+    PayloadCRC = LT.getTXPayloadCRC(TXPacketL);                                     //read the actual transmitted CRC from the LoRa device buffer
+    packet_is_OK();
+    Serial.println();
+  }
+  else
+  {
+    //if transmitReliable() returns 0 there was an error
+    packet_is_Error();
+    Serial.println();
+  }
+
+  digitalWrite(LED1, LOW);
+  Serial.println();
+  delay(5000);                                        //have a delay between packets
+
+  if (onoroff == 0)                                   //toggle the on/off status
+  {
+    onoroff = 1;
+  }
+  else
+  {
+    onoroff = 0;
+  }
+
+}
+
+
+void packet_is_OK()
+{
+  Serial.print(F("LocalNetworkID,0x"));
+  Serial.print(NetworkID, HEX);
+  Serial.print(F(",TransmittedPayloadCRC,0x"));       //print CRC of transmitted packet
+  Serial.print(PayloadCRC, HEX);
+}
+
+
+void packet_is_Error()
+{
+  Serial.print(F("SendError"));
+  LT.printIrqStatus();                                 //prints the text of which IRQs set
+  LT.printReliableStatus();                            //print the reliable status
+}
+
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println();
+  Serial.println(F("207_Reliable_SXTransmitter_Controller Starting"));
+  pinMode(LED1, OUTPUT);                            //set high for on
+  SPI.begin();
+
+  if (LT.begin(NSS, NRESET, RFBUSY, DIO1, LORA_DEVICE))
+  {
+    Serial.println(F("LoRa Device found"));
+    delay(1000);
+  }
+  else
+  {
+    Serial.println(F("No LoRa device responding"));
+    while (1);
+  }
+
+  LT.setupLoRa(2445000000, 0, LORA_SF7, LORA_BW_0400, LORA_CR_4_5);
+
+  Serial.println(F("Transmitter ready"));
+  Serial.println();
+
+  //enable the following line if you want to disable payload CRC checking
+  //LT.setReliableConfig(NoReliableCRC);                 //disable payload CRC check
+
+}