working version

RadioController.cpp

@@ -8,12 +8,45 @@ void RadioController::setup(int cepin, int cspin) {
     Serial.println("Error initializing radio");
   } else {
     Serial.println("Succesfully initializing radio");
-    radio.openWritingPipe(writePipe); 
-    radio.openReadingPipe(1, readPipe);
-    radio.setPALevel(RF24_PA_MAX);
-    radio.disableDynamicPayloads();
-    radio.setAutoAck(false); 
-    radio.setRetries(5, 15);
+    // radio.openWritingPipe(writePipe); 
+    // radio.openReadingPipe(1, readPipe);
+    // radio.setPALevel(RF24_PA_MAX);
+    // radio.disableDynamicPayloads();
+    // radio.setAutoAck(false); 
+    // radio.setRetries(5, 15);
+
+    
+    // radio.setDataRate( RF24_250KBPS );
+    // radio.openReadingPipe(1, readPipe);
+
+    // radio.enableAckPayload();
+    
+    // radio.startListening();
+
+    uint8_t address[][6] = { "1Node", "2Node" };
+    
+    // Set the PA Level low to try preventing power supply related problems
+    // because these examples are likely run with nodes in close proximity to
+    // each other.
+    radio.setPALevel(RF24_PA_LOW);  // RF24_PA_MAX is default.
+
+    // to use ACK payloads, we need to enable dynamic payload lengths (for all nodes)
+    radio.enableDynamicPayloads();  // ACK payloads are dynamically sized
+
+    // Acknowledgement packets have no payloads by default. We need to enable
+    // this feature for all nodes (TX & RX) to use ACK payloads.
+    radio.enableAckPayload();
+
+    // set the TX address of the RX node into the TX pipe
+    radio.openWritingPipe(address[1]);  // always uses pipe 0
+
+    // set the RX address of the TX node into a RX pipe
+    radio.openReadingPipe(1, address[0]);  // using pipe 1
+
+    // load the payload for the first received transmission on pipe 0
+    // radio.writeAckPayload(1, &payload, sizeof(payload));
+
+    radio.startListening();  // put radio in RX mode
   }
 }
 
@@ -30,7 +63,6 @@ void RadioController::send(String msg) {
 }
 
 String RadioController::receive() {
-  radio.startListening();
   String msg = "";
 
   if (radio.available()) {
@@ -41,3 +73,19 @@ String RadioController::receive() {
 
   return msg;
 }
+String RadioController::receiveAck(String textToSend) {
+  String msg = "";
+
+  if (radio.available()) {
+    char receivedText[32] = ""; 
+    uint8_t bytes = radio.getDynamicPayloadSize();  // get the size of the payload
+    radio.read(&receivedText, bytes);  // read only the first 'bytes' from the payload
+    msg = String(receivedText); 
+
+    char ack[8]; 
+    textToSend.substring(0, 8).toCharArray(ack, sizeof(ack));
+    radio.writeAckPayload(1, &ack, sizeof(ack));
+  }
+
+  return msg;
+}