Arduino and nrf24ap1 ANT transceiver

Wireless & IoT
1

Hello everyone!

I’ m writing because I have a problem with the ANT protocol.

I bought from Sparkfun some sensors, 2 Arduino boards and 2 transceivers ANT NRF24ap1 to create a WSN.

I connected the NRF24ap1 on the hardware serial port of the Arduino (pin 0 and 1), and I fed 3.3Volt.

Now, are many days that I try to establish communication, but the transceiver does not reply to my setup commands.

The nrf24ap1 should respond to nearly all setup commands, but I do not read anything with “serial.read”.

Can you tell me where is the error?

The manual of ANT, writes all commands in hexadecimal…

What format do I send them from Arduino to the transceiver? (BYTE…? I tried everything, but the BYTE format seems to be the “classic” method to send 8 bits)

I enclose a piece of my Arduino code:

int rts = 2;
int reply = 0;
void setup()                  
{
  Serial.begin(4800);      
 
  pinMode(rts, INPUT);   // RTS port
 
  delay(1000);
 
    rts=digitalRead(2);
    //reset
    if ( rts==LOW )     
    {
    Serial.print(0xa4,BYTE); // SYNC Byte
    delay(200);
    Serial.print(0x01,BYTE); // LENGTH Byte
    delay(200);
    Serial.print(0x4a,BYTE); // Message ID Byte ( ANT_ResetSystem() )
    delay(200);
    Serial.print(0x00,BYTE); // Data Byte N (N=LENGTH)
    delay(200);
    Serial.print(0xef,BYTE); // Checksum
    }
    delay(1000);
    
    rts=digitalRead(2);
    //assignch()
    if ( rts==LOW )     //controllo il PIN rts
    {
    Serial.print(0xa4,BYTE); // SYNC Byte
    delay(200);
    Serial.print(0x03,BYTE); // LENGTH Byte
    delay(200);
    Serial.print(0x42,BYTE); // Message ID Byte ( ANT_AssignChannel() )
    delay(200);
    Serial.print(0x00,BYTE); // Channel no. 0
    delay(200);
    Serial.print(0x10,BYTE); // Channel type (TX)
    delay(200);
    Serial.print(0x00,BYTE); // Network no. 0
    delay(200);
    Serial.print(0xf5,BYTE); // Checksum
    }
    delay(1000);  
    
    if (Serial.available() > 0) {
      reply = Serial.read();
      Serial.println(reply, DEC);
    }else { Serial.println ("no answer");}

etc…

I don’t get response from the command “assignchannel”, even from other following commands…