Serial communication with the ATTiny85

I’m moving my project from the Uno to the smaller ATTiny85(datesheet)-, and I’m having some problems. It builds and uploads just fine, but I think I’ve messed up the serial communication somewhere along the way.

What I have is a cheap RF link and a Dallas 18B20 temperature sensor. When I moved to the ATTiny the compiler stated it could not find SoftwareSerial.h, so I’m using TinyDebugSerial.h instead.

I connected the RF transmitter on the pysical pin 2 (or digital 3 / analog 3) but nothing happens. Anyone have a clue?

Could you provide dependency graph? pio run --verbose command.