The simple frame to fit all RC electronic parts:

• Arduino Nano
• KY-023 joysticks (2x)
• LCD 2004
• External buttons (6x), 3.5x3.5x6mm
• Power bank (22x22x95mm)
• HC-05 (bluetooth)

This is an extension for the joystick: https://www.thingiverse.com/thing:3911856

Some STL files contains both versions, v1 and v2 (see the postfix _v2 in file names). Use which you like more :)

The example sketch for Arduino: https://github.com/RoboLabHub/RemoteControl that was designed to work with: https://github.com/RoboLabHub/RoboDog_v3

To connect LCD to Arduino (Arduino Nano uses the same pins): https://www.makerguides.com/character-i2c-lcd-arduino-tutorial/

To connect Bluetooth (I used 5V <-> 3.3V level shifter): https://www.instructables.com/Arduino-Bluetooth-Basic-Tutorial/

Joystick pins:

Left joystick: VRx -> A2 VRy -> A3 SW -> D2

Right joystick: VRx -> A0 VRy -> A1 SW -> D3

Left buttons: L3 -> D4 L2 -> D5 L1 -> D6

Right buttons: R3 -> D7 R2 -> D8 R1 -> D9

All buttons connects Arduino pins (D2..D9) to ground.

To setup HC-05 use the FTDI adapter and Arduino monitor: Press HC-05 button and attach power to go into AT mode. Arduino terminal settings: 38400 Baud (NL&CR)

AT commands: https://cdn.instructables.com/ORIG/FKY/Z0UT/HX7OYY7I/FKYZ0UTHX7OYY7I.pdf

Slave mode (on robodog BT): AT+RMAAD AT+ROLE=0 AT+UART=115200,1,0

This command to get the address of robodog BT (add the returned address to Arduino sketch): AT+ADDR? Check this video for details: https://www.youtube.com/watch?v=Opjqe4KqTyA

Master mode (on RC joystick BT): AT+RMAAD AT+ROLE=1 AT+UART=115200,1,0