Attiny85 wireless transmitter using nrf24l01 module

Other Hardware 3rd Party Boards
1

I have an attiny85 microcontroller wireless transmitter to an arduino nano receiver using the wireless module nrf24l01 so this is the sketches and wiring for both
i'm using arduino Uno as ISP programmer to upload the sketch for the Attiny85 mcu
the nano (receiver) keeps disconnecting and connecting again and again... with the message (failed to connect!) in the serial monitor and there is no output for the sizeof(text)

Code:-

receiver nano

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

RF24 radio(9,10); 

const byte address[6] = "00001"; 

void setup() {
  radio.begin();
  radio.openReadingPipe(0, address);  
  radio.startListening();
  Serial.begin(9600);
  Serial.println("Started!");
}

void loop() {

  if (radio.available()) {
    char text[32] = "";
    radio.read(&text, sizeof(text));
    Serial.println(sizeof(text));
    Serial.println(text);
  }else{
    Serial.println("Failed To Connect!!");
  }
}

attiny85 transmitter code :

//Include Libraries
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

//create an RF24 object
RF24 radio(3, 4);  // CE, CSN

//address through which two modules communicate.
const byte address[6] = "00001";

void setup()
{
  radio.begin();
  
  //set the address
  radio.openWritingPipe(address);
  
  //Set module as transmitter
  radio.stopListening();
}
void loop()
{
  //Send message to receiver
  const char text[] = "Hello World";
  radio.write(&text, sizeof(text));
  
  delay(1000);
}

Wiring

Attiny85 ====>> nrf24l01

D3/PB3   =====> CE

D4/PB4   =====> CNS

D2/PB2   =====> SCK

D1/PB1   =====> MOSI

D0/PB0   =====> MISO

VCC      =====> 3V BATTERY 

GND      =====> 3V BATTERY GND



Arduino nano ===> nrf24l01

D9      =====>   CE

D10     =====>   CNS

D11     =====>   MOSI

D12     =====>   MISO

D13     =====>   SCK

VCC     =====>   3V3

GND     =====>   GND
2

Using the Nano as a power supply is prone to problems, use an external power supply. Also post an annotated schematic showing exactly how this was assembled.

Which one, there are a lot of different units calling themselves Nano.

3

The above does not agree with signal signatures of ATtiny85 MCU (Fig-1).

Attiny85PicPinSignal
Attiny85PicPinSignal856×169 66.4 KB

Figure-1:

4

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