The following manuals cover versions of the ErSky9x firmware up to r204 except for '9XR Pro: Ersky9x Explained' which is current to r202. The initial batch of 9XR Pro radios have r202 version firmware installed. Updating the firmware is as easy as copying the updated firmware onto the SD card and then flashing it using the buttons on the radio. See "9XR Pro: Introduction to the Hardware". A revision for 9XR Pro: Ersky9x Explaned' to cover r204 will be posted when available soon. This revision will cover the 'Latch and 'Flip Flop functions plus the eight default voice switches in the Safety Switches menu.
tgy9x is a fork of er9x, and is the default firmware that is released by hobbyking on the Turnigy 9XR transmitter.
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