3dr iris+ low current from battery - how to calibrate current and voltage sensor



Hi guys I need some help ! Just bought my first drone the iris+ gone through all the set up procedures but showing a fault in pre flight check on the battery current. I have charged the battery till green light comes on charger when I plug it in to iris+ it is giving me 12.4volts and 99% capacity but im only getting 0.4amp can anybody advise me as im looking forward to my first flight. Thanks guys

Issues Powering Pixhack


Sorry to hear about the problem with your IRIS+, and welcome to the drone hobby :smile: Have you done any firmware updates on your IRIS+ quadcopter? As that would be my first suggestion and then load the default IRIS+ parameters from the PC onto it after the firmware update.

But that error by the sounds of it its possible that the voltage and current sensor on your IRIS+ needs to be calibrated again as a fully charged 3s lipo :battery: should be 12.6V. Do you have a multimeter/ battery monitor on hand that you can use to measure your battery voltage? You will also need to get a power analysier (can be found cheaply on ebay) to calibrate your current sensor. But below is a great video showing how to do this calibration if you find that loading the default IRIS+ parameters does not solve the problem.

Hope that helps :slight_smile:

Mini Unmanned Hawk (Mini Pixhawk) Quickstart Guide