Error using NRF24L01

[SRJ]

Hello Experts,

I am trying to use NRF24L01 with ESP32 & had uploaded below code in ESP...

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(5, 19); // CE, CSN

void setup() {
  Serial.begin(115200);
  radio.begin();
  radio.openWritingPipe(0x7878787878LL); // Set the receiver address
  radio.openReadingPipe(1, 0x6767676767LL); // Set the sender address
  radio.startListening();
}

void loop() {
  char sendText[] = "Hello, receiver!"; // Message to send
  radio.write(&sendText, sizeof(sendText));
  
  if (radio.available()) {
    char receiveText[32] = "";
    radio.read(&receiveText, sizeof(receiveText));
    Serial.println("Received: " + String(receiveText));
  }
  delay(1000);
}

I am getting below message in my Serial monitor.
Will anyone tell me why is this happening & what can I do to prevent this.

rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid header: 0x044c2028
invalid heaets Jul 29 2019 12:21:46

The connections I did are as below:

NRF -> ESP
VCC -> 3.3V
GND -> GND
CE -> GPIO (e.g., GPIO5)
CSN -> GPIO (e.g., GPIO19)
SCK -> GPIO (e.g., GPIO18)
MOSI -> GPIO (e.g., GPIO23)
MISO -> GPIO (e.g., GPIO32)

Kindly help me with my issue...

Thanks!!!

[J-M-L]

don't use pastebin, very few of the helpers here will follow a link to an external site.
Just post code here using code tags.

[SRJ]

Thanks for your concern & suggestion.
I had updated my responce🙂

[J-M-L]

try different pins, like

• GND of the nRF24L01 - GND of the ESP32
• VCC of the nRF24L01 - 3.3V of the ESP32
• CE of the nRF24L01 - D4 of the ESP32
• CSN of the nRF24L01 - D5 of the ESP32
• SCK of the nRF24L01 - D18 of the ESP32
• MOSI of the nRF24L01 - D23 of the ESP32
• MISO of the nRF24L01 - D19 of the ESP32

[SRJ]

Can you tell me how can I define them in the code?

[J-M-L]

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"
RF24 radio(4, 5);

[SRJ]

I have connected as you told.

But still same issue...

[J-M-L]

what's you ESP32 exactly ? link to model / picture

[SRJ]

DOIT ESP32 DEVKIT V1

[SRJ]

I also tried using other ESP32 & some.other available codes...

Still same responce....

[J-M-L]

it's likely due to the fact that the RF24 library uses the standard SPI bus and this one is needed by the ESP32 for flash memory access

see [Question] How to use ESP32 HSPI · Issue #722 · nRF24/RF24 · GitHub for using HSPI instead

[SRJ]

I checked the link & added suggested line in code & also changed the connections according to it....

Now I am not getting that error...

Thanks & Regards!!!

[J-M-L]

cool - is it working?

have fun

[SRJ]

It didn't....

Actually the issue was different...
After lot headache I found that the ESP32 I used had different pinot-out from the ESP32 which I regularly use...

So because of this the connections I did were wrong...
I tried again with the ESP32 which I regularly use & it worked well with it.....

But still the NRF modules are unable to communicate with each other...

I think they may be damaged because of wrong connections....

Thanks for your help & guidance...