E-Trucking Tracker

Category: IoT
Platform: Firmware, GPS
Year: 2025; Built
Developer: Jake
Stat: 45 s; location upload interval
Stat: 400 ms; overspeed check
Stat: 2; TLS connections over one modem

Preview

Web

Illustrative screens, drawn from the app's source code.

ESP32 firmware for a truck tracker. It reads GPS, goes online over LTE, and streams location, speed and overspeed alerts to Firebase. A dashboard can switch tracking on and off remotely.

What's Included

GPS position and speed from a serial GPS module
LTE connection through a SIMCom A7670 modem
Location upload to Firebase every 45 seconds
Overspeed check every 400 ms with instant alerts
GPS-fix status, sent only when it changes
Remote start and stop through a live Firebase stream
Modem start-up that recovers on its own

The Problem

A fleet needs to know where each truck is and whether it is speeding, over a cellular link with no Wi-Fi. This firmware turns a LilyGO LTE board and a GPS module into a tracker that reports to Firebase.

By the Numbers

45 s
location upload interval
400 ms
overspeed check
2
TLS connections over one modem

Under the Hood

Highlight 01
Remote control without polling
Two TLS clients share the modem: one keeps a Firebase stream open for the "active" flag while the other writes data, so the tracker reacts to the dashboard right away.
Highlight 02
Non-blocking timers
Separate timers run the upload, the overspeed check and the alert-clear limit while GPS parsing and Firebase keep running.
Highlight 03
Sends only what changed
Overspeed and GPS-fix are written when their state changes, not every loop, which saves cellular data.

Information