FieldLink

ESP32 GPS nRF24 TFT UI

A tactical field communication and navigation device designed around the ESP32 microcontroller.

FieldLink is a compact outdoor communication and navigation tool. The goal is to create a simple, reliable device that combines location tracking, short-range digital communication and an intuitive user interface. Some features are still under active development.

FEATURES

Live GPS tracking
nRF24 chat communication
Navigation to another device
Waypoint navigation
Compass mode
Smooth custom UI with audio feedback

PARTS LIST

CORE ELECTRONICS

ESP32 DevKit
nRF24L01 radio module with antenna
NEO-6M GPS module
QMC5883L magnetometer module

UI

Analog joystick
Water resistant buttons
ST7735 1.8" TFT color screen
Piezo buzzer

POWER

18650 4.2V Li-ion cell
TP4056 battery charger
ON/OFF switch
Female USB Type-C port extender
Boost converter + stabiliser

WIRING & ASSEMBLY

Dupont wires
Pin headers
Heat shrink tubing
Screws
Custom 3D printed enclosure

PINOUT

Function	ESP32 GPIO
TFT SCK	18
TFT MOSI	23
TFT CS	5
TFT DC	2
TFT RST	4
Joystick X	26
Joystick Y	27
Joystick Button	13
GPS RX	16
GPS TX	17
Compass SDA	21
Compass SCL	22
nRF24 CE	15
nRF24 CSN	14
Battery ADC	34

Gallery

Photos and screenshots from the current FieldLink prototype.

Waypoints — Waypoint Navigation - COMING

Hardware

Showcase Video

Demonstration of the FieldLink prototype. Sorry for the wiring - I will fix it later.