I'm gonna throw away that Raspberry PI B Rev2 - it gave me weird graphical glitches and didn't start up properly after the first shutdown. Makes me feel bad, but on the other hand I still have the B Rev1 and A Rev2 plus the new Raspi zero.
Headless raspberry PI A - aka 'pia' is running now. The power switch I used might be a bit dodgy, I've seen the lights going on again when switching the power off. That might not be healthy for the PI. The 8GB SD card looks good, 6GB are formatted to FAT32 and are meant to be storage.
For OOKing around with the 433MHz and the power monitoring stuff I need the correct pinout. The module was called "5A ACS712 Module Range Current Sensor For Arduino" on ebay. It's a hall effect based current measure thingy.
https://www.raspberrypi.org/documentation/usage/gpio/
Much Nice. Such wow.
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I have one rpi in my box of shame too. But that one gradually broke as a result of talking to a 5V servo controller without any level shifting.
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