This what you need is this, A small micro (stm8 is cheap and do just fine) .. which talks to the BBB over the serial port, so you can send/receive commands/status..(pick your test) load info.. etc.. this small micro is always power cyclical s once every 2 mints lets say.. you can never prevent the small micro from being power cycled. It save's what is was doing.. and wake's up on the next power up.. check to see what test it was running.. lets say CPU load on the BBB, if outside of allowed.. time.. load.. etc... your reset's the BBB, or power cycle, you can also check for correct power up of the BBB, and switch it too a diff-ant boot source etc.. so.. if the small micro git hit my a cosmic ray.. for example if will always power cycle.. of and on.. clear the error.. and recover. you can also setup long path check's.. so a token is send to the BBB which has to come back in some time frame etc.. if out side the test range... your BBB task is frozen and needs a reset.. etc.. Pick you test...
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