Instruction "How to build DIY Arduino Transmitter OpenTx firmware" will describe how to build 2.4G 8-channel DIY transmitter using MEGA2560 Arduino controller installing OpenTx firmware which similar to commercial transmitter in the market.
The Arduino MEGA2560 will produce traditional PPM signal to send to RF module that can communicate to general transmitter modules like Frsky,Flysky,Orange,..etc. Difficulty : Hard Materials 1. 1 - Arduino controller - MEGA2560 Core
1.Installing electronic parts on DIY PCB according to electrical circuit diagram.(see in Github) 2.Install switches,joy stick gimbals,push buttons on transmitter body.
3.Wiring and connecting PCB - MEGA2560 - Gimbals - Switches - Push buttons according to circuit diagram.
Firmware installation(can do before hardware installation)
1.Downloading software OpenTx companion2.2.x from OpenTxwebsite.
2.Installing OpenTx companion on PC.
3.RunningOpenTx companion,downloading firmware by using OpenTx companion.
3.1 Edit setting menu - Radio type : DIY MEGA2560 radio 3.2 Build option - ST7920 - frsky - sdcard - more option as you want
3.3 Default Stick Mode(Futaba) - Mode3 (AIL ELE THR RUD) 3.4 Default Channel Order (Futaba) - A E T R 4.Flashing Arduino MEGA2560 by using usbtiny. See detail of flasing procedure in Github.