Programming with "arduino as ISP"

[maxgerhardt]

@nablabla

platform = atmelavr
board = attiny44
framework = arduino

In this config you’re using

platformio/platform-atmelavr/blob/develop/boards/attiny44.json#L2-L8

platformio/platform-atmelavr/blob/develop/platform.json#L40-L45

Aka GitHub - SpenceKonde/ATTinyCore at 1.5.2.

Be mindful of the pinmapping.

When you write

@nablabla

#define PIN_LED_1 9
void setup()
{ pinMode(PIN_LED_1, OUTPUT);}

You are telling it to control Arduino pin “D9”. Which is,

SpenceKonde/ATTinyCore/blob/c0a1f40140d0b7d06a6994473dc6b8c8aca48a37/avr/variants/tinyX4/pins_arduino.h#L172-L183

Pin PA1, the 12th pin of the package. Did you mean to control this pin, or some other pin?