ESP8266 Community Forum

- Wed Aug 04, 2021 9:46 pm #92003 For the last couple days I've been trying, and failing to make two ESPs talk to each other via radio. One of them is going to be replaced with something less power-hungry in due time, but for now I'm trying to get a proof of concept going.

Anyway, long story short, after checking multiple different variations of wiring and dumbing down the code to the absolute minimum, I keep getting the same result - both transceivers seem to be functioning no problem (or I'm horrifically mistaken about something), but no messages go through.

Transmitter

Code: Select all#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(D1, D2); // CE, CSN

uint8_t address[][6] = {"1Node","2Node"};

void setup() {
 
  Serial.begin(9600);
  delay(1000);
 
  if(!radio.begin())
    Serial.println("init failed");
  else
    Serial.println("init ok");
   
      // radio.setDataRate( RF24_2MBPS ) ;
  // radio.setPALevel( RF24_PA_MAX ) ;
  radio.enableDynamicPayloads() ;
  radio.setAutoAck( true ) ;
  radio.powerUp() ;
 
 
  radio.openWritingPipe(address[1]);
  radio.setPALevel(RF24_PA_MIN);
  radio.stopListening();


  //
  // Print out the configuration of the rf unit for debugging
  //

  radio.printPrettyDetails();
}
void loop() {
  const char text[] = "Hello World";
  if(!radio.write(&text, sizeof(text)))
 
  Serial.println("Sending failed");
 
  delay(1000);
}

Reciever

Code: Select all#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(D1, D2); // CE, CSN

uint8_t address[][6] = {"1Node","2Node"};

void setup() {
  Serial.begin(9600);
  delay(1000);
 
  if(!radio.begin())
    Serial.println("init failed");
  else
    Serial.println("init ok");
 
  radio.enableDynamicPayloads() ;
  radio.setAutoAck( true ) ;
  radio.powerUp() ;
 
 
  radio.begin();
  radio.openReadingPipe(0, address[1]);
  radio.setPALevel(RF24_PA_MIN);
  radio.startListening();
 
  radio.printPrettyDetails();
}

void loop() {
  if (radio.available()) {
    char text[32] = "";
    radio.read(&text, sizeof(text));
    Serial.println(text);
  }
  else
    Serial.println("No message recieved");
}

Wiring for both is identical


printPrettyDetails() dump

Code: Select allinit ok
SPI Frequency      = 10 Mhz
Channel         = 76 (~ 2476 MHz)
RF Data Rate      = 1 MBPS
RF Power Amplifier   = PA_MIN
RF Low Noise Amplifier   = Enabled
CRC Length      = 16 bits
Address Length      = 5 bytes
Static Payload Length   = 32 bytes
Auto Retry Delay   = 1500 microseconds
Auto Retry Attempts   = 15 maximum
Packets lost on
    current channel   = 0
Retry attempts made for
    last transmission   = 15
Multicast      = Disabled
Custom ACK Payload   = Disabled
Dynamic Payloads   = Enabled
Auto Acknowledgment   = Enabled
Primary Mode      = TX
TX address      = 0x65646f4e32
pipe 0 ( open ) bound   = 0x65646f4e32
pipe 1 ( open ) bound   = 0x65646f4e32
pipe 2 (closed) bound   = 0xc3
pipe 3 (closed) bound   = 0xc4
pipe 4 (closed) bound   = 0xc5
pipe 5 (closed) bound   = 0xc6


init ok
SPI Frequency      = 10 Mhz
Channel         = 76 (~ 2476 MHz)
RF Data Rate      = 1 MBPS
RF Power Amplifier   = PA_MIN
RF Low Noise Amplifier   = Enabled
CRC Length      = 16 bits
Address Length      = 5 bytes
Static Payload Length   = 32 bytes
Auto Retry Delay   = 1500 microseconds
Auto Retry Attempts   = 15 maximum
Packets lost on
    current channel   = 0
Retry attempts made for
    last transmission   = 0
Multicast      = Disabled
Custom ACK Payload   = Disabled
Dynamic Payloads   = Disabled
Auto Acknowledgment   = Enabled
Primary Mode      = RX
TX address      = 0x65646f4e32
pipe 0 ( open ) bound   = 0x65646f4e32
pipe 1 ( open ) bound   = 0x65646f4e31
pipe 2 (closed) bound   = 0xc3
pipe 3 (closed) bound   = 0xc4
pipe 4 (closed) bound   = 0xc5
pipe 5 (closed) bound   = 0xc6


Sny idea what I'm missing here?