Operation without the ATTiny having to time out the Serial baud rate. He has also made a half-duplex Serial library, that can be uses with just one pin for rx and tx.īasically this gives you the advantage of Asyncronous Serial communication, but uses a clock line to time the bits allowing for full duplex This library is developed by Ralph Doncaster, and are so small that you can use it on a ATtiny13į/index.php?topic=207467.0 Just to be sure nothing bad happens to your Arduino you should first upload an empty sketch to the UNO, and connect a 220 ohms resistor between PB3 and TX.

You can also use your Arduino as USB/serial converter: Connect a jumperwire from reset to ground on the Arduino,Īnd connect the outputpin from the tiny (PB3 in the above picture) to TX (pin 1) on the arduino (labeled TX->1). In this picture I use a cheap USB/Serial converter from Ebay: You can connect the Tiny to your computers USB using a USB/serial converter: The above mentioned pins are for clock frequence 8 MHz or less (no x-tal) Note there is no difference in the code from the Arduino code, and no library's needed. Using the sketch above your tiny will output on This option is TX only, that is you can send serial information from the tiny to your computer, and not the other way, but for debug information this is also usually what you want. There are several options to get the same functionality as you are used to in the Arduino environment. In the following text I will assume you are using this core: If you are using one of the tiny's things are a bit different, but you also get more options. When you use the Arduino with the Arduino IDE, you are used to use Serial.print and the serial monitor, when you want to get some debug information.

Arduino 1.8.5 files for attiny