Attiny85 with Manchester Library

Projects Programming
1

hi
my goal is to have two attiny85 (one with a reciever and one with a transmitter running at 433Mhz ) transmitting data from one to the other. I am using the Manchester encoding library. I got one attiny85 to transmitt data to an Arduino uno but i never got an attiny85 to receive data eventough their are no errors and i run the exact same code that worked on the arduino uno.
I also use the arduino to program the attiny85 via Arduinoisp.

my transmitter code

#include <Manchester.h>

#define TX_PIN 3  //pin where your transmitter is connected
#define LED_PIN 4 //pin for blinking LED

uint16_t transmit_data = 0;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  man.workAround1MhzTinyCore(); //add this in order for transmitter to work with 1Mhz Attiny85/84
  man.setupTransmit(TX_PIN, MAN_1200);
}

void loop() {
  man.transmit(transmit_data);

  digitalWrite(LED_PIN, HIGH);
  delay(1000);
  digitalWrite(LED_PIN,LOW);
  delay(1000);
}

my receiver code

#include <Manchester.h>

void setup() {
  pinMode(4, OUTPUT);
  man.setupReceive(3, MAN_1200);
  man.beginReceive();
}

void loop() {
  if (man.receiveComplete()) {
    uint16_t m = man.getMessage();
    man.beginReceive();
    if(m == 0 ){
    digitalWrite(4, HIGH);
    delay(100);
    }
  }
  digitalWrite(4,LOW);
}

can you please help me

2

Try shortening the delay() in the receiver code when the 1 MHz Tiny runs it.

Reason being that the 16 MHz UNO will take 100 millis to run that but won't the 1 MHz Tiny take 16x longer?
And if it does then the Tiny as receiver will be locked in delay when the transmitter sends the message.
16 x 100 millis is 1.6 seconds.

BTW, you should be able to get the Tiny to run at 8 MHz.

3

I had a lot of trouble with a similar issue, and solved it by using the arduino-tiny core. Have you seen this:

I have got two ATTINY85s to communicate with RF using the Manchester library: it is possible.