transmitter
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#include <HardwareSerial.h> HardwareSerial LoRaSerial(1); // Using UART 1 on ESP32 int messageCount = 0; // Initialize a message counter // Joystick and button pin definitions unsigned char jX = 34; // Analog pin for X-axis unsigned char jY = 35; // Analog pin for Y-axis unsigned char batV = 25; // Analog pin for Y-axis unsigned char btm1 = 32; // Digital pin for button 1 unsigned char btm2 = 33; // Digital pin for button 2 unsigned char btm3 = 25; // Digital pin for button 3 void setup() { Serial.begin(115200); // Start the Serial Monitor at 115200 baud while (!Serial); // Wait for the serial port to connect LoRaSerial.begin(115200, SERIAL_8N1, 16, 17); // Initialize LoRaSerial with RX=16, TX=17 analogReadResolution(8); // Initialize joystick and button pins pinMode(btm1, INPUT_PULLUP); pinMode(btm2, INPUT_PULLUP); pinMode(btm3, INPUT_PULLUP); // Initialize LoRa module sendCommand("AT+RESET"); // Reset the module sendCommand("AT+ADDRESS=1"); // Set device address sendCommand("AT+NETWORKID=4"); // Set network ID sendCommand("AT+BAND=868500000"); // Set frequency to 868.5 MHz sendCommand("AT+PARAMETER=7,8,1,7"); // Set parameters: Spreading factor, Bandwidth, Coding rate, Preamble length sendCommand("AT+CRFOP=15"); // Set power level sendCommand("AT+VER"); // Get firmware version sendCommand("AT+MODEL"); // Get model information sendCommand("AT+ADDRESS?"); // Get current device address sendCommand("AT+BAND?"); // Get current frequency band sendCommand("AT+NETWORKID?"); // Get current network ID Serial.println("Module information retrieval completed."); } void loop() { // Read joystick values (8-bit resolution) int jXValue = analogRead(jX); // Scale to 8-bit (0-255) int jYValue = analogRead(jY); // Scale to 8-bit (0-255) int batteryValue= analogRead(batV); // Read button states (0 = pressed, 1 = not pressed) int btm1State = digitalRead(btm1); int btm2State = digitalRead(btm2); int btm3State = digitalRead(btm3); // Prepare message with joystick and button data String message = "[" + String(jXValue) + ":" + String(jYValue) + ":" + String(batteryValue) + ":" + String(btm1State == LOW ? 1 : 0) + "" + String(btm2State == LOW ? 1 : 0) + "" + String(btm3State == LOW ? 1 : 0) + ":" + String(messageCount) + "]"; // Construct the full AT command to send the message String command = "AT+SEND=2," + String(message.length()) + "," + message; // Send the message sendCommand(command.c_str()); // Convert String object to C-string messageCount++; // Increment the message counter after sending delay(100); // Delay before the next loop iteration } void sendCommand(const char* command) { Serial.print("Sending Command: "); Serial.println(command); LoRaSerial.println(command); delay(400); // Delay to allow for command processing readLoRaResponse(); } void readLoRaResponse() { while (LoRaSerial.available()) { String response = LoRaSerial.readStringUntil('\n'); Serial.println(response); // Print the response to the Serial Monitor } } |
receive
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#include <HardwareSerial.h> #include <ESP32Servo.h> // Include ESP32Servo library Servo myServo; // Create a Servo object HardwareSerial LoRaSerial(1); // Using UART 1 on ESP32 int position = 90; // Initial servo position (between 0 and 180 void setup() { myServo.attach(25); // Attach the servo to pin 25 on the ESP32 myServo.write(position); // Set the initial position of the servo Serial.begin(115200); // Start the Serial Monitor at 115200 baud while (!Serial); // Wait for the serial port to connect LoRaSerial.begin(115200, SERIAL_8N1, 16, 17); // Initialize LoRaSerial with RX=16, TX=17 analogReadResolution(8); // Initialize RYLR890 sendCommand("AT+RESET"); // Set device address delay(2500); sendCommand("AT+ADDRESS=2"); // Set receiver device address delay(2500); sendCommand("AT+NETWORKID=4"); // Set network ID delay(2500); sendCommand("AT+BAND=868500000"); // Set frequency to 868.5 MHz (adjust as needed) sendCommand("AT+PARAMETER=7,8,1,7"); sendCommand("AT+PARAMETER?"); // Set network ID delay(2500); // Check if any additional settings are specific to RYLR890 //sendCommand("AT+PARAMETER=7,125,1,8"); // Spreading factor, bandwidth, coding rate, preamble length (if supported) sendCommand("AT+VER"); // Get firmware version sendCommand("AT+MODEL"); // Get model information (if supported) sendCommand("AT+ADDRESS?"); // Get current device address sendCommand("AT+BAND?"); // Get current frequency band sendCommand("AT+NETWORKID?"); // Get current network ID Serial.println("Module information retrieval completed."); Serial.println("RYLR890 LoRa receiver..."); } void loop() { // Check if '[' and ']' exist in the string int startIndex; int endIndex; while (LoRaSerial.available()) { String receivedData = LoRaSerial.readStringUntil('\n'); if (receivedData.length() > 0) { Serial.print("Received Data: "); Serial.print(receivedData); if (receivedData.startsWith("+RCV=")) { // Remove the "+RCV=" prefix and split the string by commas receivedData = receivedData.substring(5); // Remove "+RCV=" String parts[5]; // Array to hold the split parts int partIndex = 0; while (receivedData.length() > 0 && partIndex < 5) { int commaIndex = receivedData.indexOf(','); if (commaIndex != -1) { parts[partIndex++] = receivedData.substring(0, commaIndex); receivedData = receivedData.substring(commaIndex + 1); } else { parts[partIndex++] = receivedData; break; } } // Print the array parts for real-time monitoring /* for (int i = 0; i < partIndex; i++) { Serial.print("Part "); Serial.print(i); Serial.print(": "); Serial.println(parts[i]); } */ // Check if '[' and ']' exist in the string startIndex =parts[2].indexOf('['); endIndex =parts[2].indexOf(']'); if (startIndex != -1 && endIndex != -1 && endIndex > startIndex) { // Extract the substring between the brackets String data =parts[2].substring(startIndex + 1, endIndex); // Split the string into an array by ':' String values[6]; int index = 0; int lastIndex = 0; // Serial.println("<" + data +">"); while (lastIndex < data.length()) { int colonIndex = data.indexOf(':', lastIndex); if (colonIndex == -1) { colonIndex = data.length(); // Set to the end of the string for the last element } values[index++] = data.substring(lastIndex, colonIndex); lastIndex = colonIndex + 1; } // Print the array to verify for (int i = 0; i < index; i++) { Serial.println(values[i]); } int y = values[0].toInt(); // Convert string to int // Check the value of y and adjust the position if (y >= 125) { position += 5; if (position > 180) { position = 180; // Ensure the position does not exceed 180 } myServo.write(position); // Update servo position Serial.println("Servo position increased to: " + String(position)); } else if (y < 110) { position -= 5; if (position < 0) { position = 0; // Ensure the position does not go below 0 } myServo.write(position); // Update servo position Serial.println("Servo position decreased to: " + String(position)); } } // Optional: Process specific parts, such as RSSI or message content // Serial.print("Message Content: "); // Serial.println(parts[2]); // Adjust index as needed for specific parts Serial.print("-->"+parts[2]); Serial.print(" RSSI: "); Serial.print(parts[3]); // RSSI value Serial.print( " SNR: "); Serial.println(parts[4]); // RSSI value } else { // Print other non-RCV responses for monitoring Serial.println(""); } } } } void sendCommand(const char* command) { Serial.print("Sending Command: "); Serial.println(command); LoRaSerial.println(command); delay(100); // Delay to allow for command processing readLoRaResponse(); } void readLoRaResponse() { while (LoRaSerial.available()) { String response = LoRaSerial.readStringUntil('\n'); Serial.println(response); // Print the response to the Serial Monitor } } |
