When the parameter download to device failed, I pretty much knew where the problem is. Visual inspection only confirmed the suspicion:
Not very good photo, I know, but without macro lens this is just about best I could do. Maybe I should try to build some kind of adapter so I could attach camera to the microscope...
Yes, it's typical serial EEPROM on I2C bus. One leg raised (VCC), another just barely soldered. Easily fixed and good to go.
Which allows me to awkwardly transit to another serial item, RS232 I praised previously. Soon(-ish, time allowing) I'll be posting some simple code examples on how to build communication between two devices with increasing complexity and safety.
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