Problem with receiving data (from a Hello World tutorial)

Projects Programming
1

Hey,

can somebody help me, if i send a data from arduino to raspberry i see somethink is sended but failed by receiving.

here is my code:

#include<SPI.h>
#include<RF24.h>

RF24 radio(9, 10);

void setup(void) {
  while(!Serial);
  Serial.begin(9600);

  radio.begin();
  radio.setPALevel(RF24_PA_MAX);
  radio.setChannel(0x76);
  radio.openWritingPipe(0xF0F0F0F0E1LL);
  //const uint64_t pipe = 0xE8E8F0F0E1LL;
  radio.openReadingPipe(1, 0xE8E8F0F0E1LL );
  radio.enableDynamicPayloads();
  radio.powerUp();

}

void loop(void) {
 radio.startListening();
 Serial.println("Starting loop. Radio on.");
 char receivedMessage[32] = {0};
 if (radio.available()){
  radio.read(receivedMessage, sizeof(receivedMessage));
  Serial.println(receivedMessage);
  Serial.println("Turning off the radio");
  radio.stopListening();

  String stringMessage(receivedMessage);

  if (stringMessage == "GETSTRING"){
    Serial.println("Looks like they want a string");
    const char text[] = "Hello World";
    radio.write (text, sizeof(text));
    Serial.println("We sent our message");
    
  }
 }
 
  delay(100);
 
}

The answer if i start the program is:

pi@raspberrypi:~/Desktop/NRF24L01 $ sudo python3 sendreceiveArduino.py
/home/pi/Desktop/NRF24L01/lib_nrf24.py:377: RuntimeWarning: This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.
  self.GPIO.setup(self.ce_pin, self.GPIO.OUT)
STATUS	 = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
RX_ADDR_P0-1	 =
 0xe8e8f0f0e1 0xf0f0f0f0e1
RX_ADDR_P2-5	 =
0xc3
0xc4
0xc5
0xc6

TX_ADDR		 =
 0xe8e8f0f0e1
RX_PW_P0-6	 =
0x20
0x20
0x00
0x00
0x00
0x00

EN_AA		 =
0x3f

EN_RXADDR	 =
0x03

RF_CH		 =
0x76

RF_SETUP	 =
0x01

CONFIG		 =
0x0f

DYNPD/FEATURE	 =
0x3f
0x06

Data Rate	 = 1MBPS
Model		 = nRF24l01+
CRC Length	 = 16 bits
PA Power	 = PA_MIN
Sent the Message: ['G', 'E', 'T', 'S', 'T', 'R', 'I', 'N', 'G', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Received: []
Translating our received Message into unicode characters...
Our received message decodes to: 
Received: []
Translating our received Message into unicode characters...
Our received message decodes to: 
Timed out.
Sent the Message: ['G', 'E', 'T', 'S', 'T', 'R', 'I', 'N', 'G', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Received: []
Translating our received Message into unicode characters...
Our received message decodes to: 
Received: []
Translating our received Message into unicode characters...
Our received message decodes to: 
Timed out.

Thanks for helping me.

Moderator edit:
</mark> <mark>[code]</mark> <mark>

</mark> <mark>[/code]</mark> <mark>
tags added.

2

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile:

3

@mgkii, do not use picload for hosting images. Please host them here...

http://forum.arduino.cc/index.php?topic=364156.0

4

@mgkii, please do not cross-post. Other thread removed.

5

Have a look at this Simple nRF24L01+ Tutorial

You have not posted your RPi code so I have no idea whether it is compatble with your Arduino program.

I suggest you simplify the Arduino program so that it just sends "Hello World" once per second.

Have you got a second Arduino so you could try Arduino to Arduino wireless? I don't have an RPi.

...R