I rewired the connections to the socket from Arduino's A4 and A5 pins to the still available D10 and D11 pins and connected an 128x64 OLED screen to the chip tester. I needed only 4 wires: +3.3v, GND, SCL and SDA. A simple user interface brings the usability to a completely new level. The serial interface messages had to be removed in order to save space in the firmware. Now I am satisfied with the tester and gonna make a robust case for it.

All the files for the project and the mod can be found in my Github repository:
[ Ссылка ]

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