Freematics Esprit is an Arduino compatible dev board based on Espressif ESP32, an ARM core SoC with built-in WIFI and BLE. The board has an xBee seat for additional communication module. With a SIM5360 be module plugged in, the board can connect to Internet via cellular network when WIFI is unavailable. This post will demonstrate how to access Internet (HTTP GET) via cellular network with ESP32 and SIM5360.

This article will guide you through the simple steps to set up your own vehicle telemetry system with any computer (e.g. a PC) and some knowledge about Arduino.

Prerequisites

A vehicle tracking system allows one or more vehicles to be monitored in real-time from a user terminal (computer or mobile device).

Telemetry Data Server

Freematics Hub is a free light-weight telemetry data server which receives, caches, stores and illustrates data received from telemetry devices. Designed with efficiency and portability in priority, it runs on systems of any footprint, servers, desktops or a SBCs like Raspberry Pi. The computer running the software, however, must have inbound WAN access, in other word, an IP address accessible from Internet. This depends on broadband companies. If you deploy the server software on a virtual private server in the cloud, then this is not an issue. Two ports are used by Freematics Hub, 8080 for HTTP and 8081 for UDP. The ports must be unblocked for access.