RC - Controller ( Transmitter ) Apex-Link
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The Apex-Link is the command center for the modern maker. Designed as a high-precision, low-latency RC transmitter, this
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- Printables
- Kategoria
- Prusa Parts & Upgrades
- Licencja
- Creative Commons — Public Domain
Project Title: Apex-Link | ESP32 Universal RC Controller
Description
The Apex-Link is a high-performance, DIY remote controller designed for low-latency robotics and RC vehicle control. Built around the powerful ESP32, this transmitter offers dual-stick precision, a rotary encoder for menu navigation, and a 16x2 LCD for real-time telemetry and battery monitoring.
Powered by a 2S Li-ion battery with an integrated step-down converter, it provides hours of stable operation. Whether you are controlling a quad-spider, a hexapod, or a racing rover, this controller is the perfect bridge between the pilot and the machine.
Component List (BOM)
Component | Quantity | Description |
|---|---|---|
ESP32 Dev Board | 1 | Main MCU with WiFi/Bluetooth/ESP-NOW |
Analog Joysticks | 2 | Dual-axis control (X/Y) with click buttons |
16x2 LCD Display | 1 | I2C version recommended for easy wiring |
Rotary Encoder | 1 | For menu navigation and mode selection |
SPST Toggle Switch | 1 | Master power cutoff |
2S 18650 Battery Pack | 1 | 7.4V Li-ion power source |
DC-DC Buck Converter | 1 | Steps 7.4V down to 5V/3.3V |
3D Printed Housing | 1 | Ergonomic controller shell |
Export to Sheets
Labels & Controls Mapping
If you are designing the faceplate or writing the UI, here is a standard mapping:
Left Stick: Throttle / Yaw (Movement)
Right Stick: Pitch / Roll (Direction)
Rotary Encoder: Sensitivity Adjust / Menu Scroll
LCD Header: Telemetry (Signal Strength, Battery %, Mode)
Main Switch: System Power (ON/OFF)
Suggested Tags
ESP32 RemoteControl RC Transmitter Joystick Robotics ESP-NOW Telemetry Controller 3DPrinted DIYElectronics Arduino DroneSpiderRobot
Print & Build Tips
The Shell: Print with 3-4 perimeters to ensure the screw holes for the joysticks don't strip.
Supports: The main body may require "Tree Supports" for the joystick cutouts.
Wiring: I recommend using a small piece of protoboard to centralize the Ground and VCC rails for the joysticks and LCD.
Code: This hardware setup works perfectly with the ESP-NOW protocol for ultra-low latency control without needing a WiFi router.