Program Hc-05 BlueTooth module with Apm and step by step install video
Program Hc-05 with your apm and install step by step.
Made simple firmware to program your Bluetooth module
so you don't need to get a ftdi cable or usb to serial adapter
It will let you change the name of the bt module, baud rate and password.
Or just pass "AT" commands ..
Package..
https://drive.google.com/open?id=1hIcUbuAnjK0ITpW5qph40U9HQicJ4FJ8
I included factory firmware 3.1.2 for cx20 v252 v5.
For both apm's before installing BtApmProgrammer
you can back up your params , they should be safe but its up to you.
..I will add pictures to the package in a few days.
banggood links
https://goo.gl/btcG5f // bt-module for apm
https://goo.gl/WEKu4v // HC-05 module
https://goo.gl/oFhtvZ //servo wires
https://goo.gl/4NqzJw //df13 5 pin connector.
by default its 4 pin make sure to click on the model type and change to 5pin
https://goo.gl/RZm6Cz // ftdi usb to serial adapter.