Dear community,
After asking my previous question, I now have another one.
I am attempting to make Serial work on my ATtiny85. I am using the SoftwareSerial library that comes with the Arduino 1.6.4, and the Arduino IDE version 1.6.4. For some reason, Serial refuses to work at all, only working when I jiggle the pins. I can see that when I attach my LED to the serial port of the ATtiny something is happening, but I can’t read it with my Uno.
ATtiny85 Code
#include <SoftwareSerial.h>
const int RX = 2;
const int TX = 3;
SoftwareSerial mySerial(RX, TX);
const int ledPin = 1;
int state = 0;
void setup()
{
pinMode(RX, INPUT);
pinMode(TX, OUTPUT);
mySerial.begin(9600);
pinMode(ledPin, OUTPUT);
}
void loop()
{
if(mySerial.available())
{
state = mySerial.readString().toInt();
}
digitalWrite(ledPin, state);
}
Obviously, this is not the code that I wish to use, but it recreates the problem well enough.
Arduino Uno code
#include <SoftwareSerial.h>
int RX = 2;
int TX = 3;
SoftwareSerial mySerial(RX, TX);
void setup()
{
pinMode(RX, INPUT);
pinMode(TX, OUTPUT);
mySerial.begin(9600);
Serial.begin(9600);
Serial.println("Ready.");
}
void loop()
{
if(Serial.available() > 0)
{
mySerial.print(Serial.readString().toInt());
Serial.println("Sent.");
delay(1000);
}
}
Pin 2 on the Arduino is connected to pin 3 on the ATtiny, and pin 2 on the ATtiny is connected to pin 3 on the Arduino.
I have flashed the bootloader to internal 8 MHz, and I am using the “Arduino as ISP” programmer. The ATtiny is on a common ground with the Arduino, being powered by it, and it has 5V from the Arduino on-board power supply. A tantalum 0.1uF capacitor is attached between the ATtiny’s power and ground.
What am I doing wrong?
Thank you!
Cyberman112