This is a very simple mockup of SSD1306 ESP8266 libraries, Arduino for ESP32 and the original ArduinoISP, forming a useful AVR ISP programmer usable with avrdude.I modified ArduinoISP code a bit to ...

It works for ArduinoISP, but this may have side effects (hanging other sketches if serial port is not opened?). A work around has been proposed to use ArduinoISP with the arduino protocol instead of ...

While the new ArduinoISP (in-system programmer) board has been created to provide extra space on the Arduino board for developers and makers and is based on David Mellis’ projectFabISP.