This is perplexing. I've got a nice solid 5v coming out of the power module. Everything powers up nicely. Yet it shows 0 volts and 83 amps. It's just sitting on my desk disarmed. Params are set for the voltage and current, and using the 3DR power module settings for APM. Suggestions?
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Nevermind. Some idiot :x used the wrong cable... All is well.
is it a new power module? have you used it before correctly?
maybe the voltage and current sense wires are crossed? APM set to look at correct inputs for voltage and current? scaling factors correct?
On my PM there are solder pads on the other side of the board from the connector, have you measured these with a volt meter?