ATtiny 13 controller
how can I program ATtiny 13 chip with a new program .The chip is already programmed
Hi @aishwarya7 Welcome to the MySensors community!
I am not familar with the attiny13, but from the datasheet it looks like it has too little flash and sram to run MySensors.
Instructions on how to upload sketches to an Arduino is available at https://www.mysensors.org/about/arduino#uploading-example-sketches
See the buying guide for information on which components are recommended when getting started.