Added infos to troubleshooting and Tips & Tricks

[racerxdl]

I added a schematic and how to add a battery voltage monitor to Megapirate (schematic and instructions at tip & tricks) also added troubleshooting about Arming problems at Crius V1.1

[smurfy]

Thanks, looks great.

There is a topic about current and voltage sensor in the offical docu, but not for only using the simple schematic with the two resistors, so its great to document it here.

But in the official documentation there is a link to detailed calibriation info.

could you please try to add those (or just one) link in your otherwise great documentation?

[smurfy]

I would merge this PR otherwise too, but i think a link somehow to the official docu could be usefull :D

[racerxdl]

Sure, I will add it ^^

[racerxdl]

Okay, so I added links for Compass calibration at troubleshoot section and also link to Pre-Arm Check, so people can read why it doesnt arm. On the Tips & Tricks section I added a link to Power Module set-up to measure battery voltage and current consumption of oficial documentation. I will add more things soon ^^

[smurfy]

Thank you again, merged