Hanging problem.

tunedwolf said:

Could be a local lightning strike or other electrical or electrostatic discharge causing a latch-up. Could be a voltage problem, poor contact or a gazillion other possible physical, mechanical or electrical problems.

Is the circuit screened properly ? All lead wiring EMI / RFI protected etc ?

Could be intermittent or noisy clocking or a flaky reset circuit or just a faulty micro.

If all pins went high, it might suggest that your code, for whatever reason, jumped off to never never land, i.e a stack overflow, a pop without a push etc.
Creating a reset condition without a vector in some manner.

Perhaps an unusual combination of events triggers the problem.
What you need is a log of the events leading up to the anomaly, like pin states, register contents etc.
Maybe write an additional piece of code to log stuff as it happens ?

rgds

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What you need is a log of the events leading up to the anomaly, like pin states, register contents etc.

Click to expand...

Leftyretro said:

Does the unit come back to normal operation on it's own or does it need to be reset or power cycled?

Lefty

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user_88 said:

What about putting in an earth ground? .... Just a copper stake .... some copper braid. This might eliminate a lot of the electrostatic possibilities..... If it's solar powered, it might not be grounded adequately.

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