Uploaded November 2018 | Updated September 2026, 2 weeks ago

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Updated video about how to flash your Flysky GT3B, GT3C, GTX3 with the hacked custom firmware by PSX. A few things have changed since the last video I did a few years ago. I'll try to go over the common issues that pop up as well as show you how to calibrate it when done.

The GT3C can be flash the same way, but the 4 pins are located in a different area show here: bit.ly/gt3cpinout

FS GT3C with PSX firmware already installed
bit.ly/bggt3bpsx

FlySky GT3B Transmitter
Gearbest coupon code: GBKENVFL
gearbest.com/helicopters-accessories/pp_009964301436.html?lkid=17795840

ST-LINK V2 STM8 USB Programmer
amzn.to/2r3znhL

Soldering iron USB powered
gearbest.com/other-tools/pp_240618.html?lkid=17955010

PSX's GT3B Hacked Firmware
github.com/semerad/gt3b

STVP Visual Programmer
st.com

My Firmware Setup Configuration Guide
youtube.com/watch?v=BG-5BPqqltg

8CH setup guide
youtube.com/watch?v=rrUYTxYjflM

GT3C pinout:
bit.ly/gt3cpinout

Compatible Receivers:

FlySky 3CH receiver
gearbest.com/radios-receiver/pp_678269.html?lkid=16120486

FlySky 6CH receiver
gearbest.com/helicopters-accessories/pp_009458580463.html?lkid=16120490

FlySky 8CH receiver
gearbest.com/radios-receiver/pp_009393956696.html?lkid=16120488