{"id":434,"date":"2026-03-14T11:44:07","date_gmt":"2026-03-14T11:44:07","guid":{"rendered":"https:\/\/circuitdigest.com\/wiki\/?page_id=434"},"modified":"2026-03-17T13:08:15","modified_gmt":"2026-03-17T13:08:15","slug":"geolinker-esp32-sim868-cellular-iot-gps-tracking-development-board","status":"publish","type":"page","link":"https:\/\/circuitdigest.com\/wiki\/geolinker-esp32-sim868-cellular-iot-gps-tracking-development-board\/","title":{"rendered":"GeoLinker GL868 ESP32"},"content":{"rendered":"\n

<\/span>Introduction<\/span><\/h2>\n\n\n\n

The GeoLinker GL868_ESP32 <\/strong>is a production-ready, open-source development board that combines an ESP32-S3<\/strong> and SIM868<\/strong> GSM<\/strong> modem, with GPS Tracking, motion detection, battery management, wireless connectivity (Bluetooth\/Wifi) and cellular monitoring (GPRS\/SMS\/Calls) on a compact PCB. It targets asset tracking, vehicle monitoring, anti-theft systems, and any IoT application that needs cellular monitoring or control, along with location tracking. <\/p>\n\n\n\n

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The board ships with an Airtel M2M IoT Sim card<\/strong> (optional) and readily supports the GeoLinker GPS tracking dashabord<\/strong><\/a> allowing you to track and visualise data on a map right out of the box for quick prototyping. For further developement you can use the open-source GL868_ESP32 Arduino library<\/strong>, which provides a high-level, non-blocking API for GPS tracking, HTTP data upload, SMS command processing, voice call handling, and deep-sleep power management. <\/p>\n\n\n\n

Unlike normal GPS shields or modules, which require wiring and separate power management, the GL868_ESP32 is an all-in-one hardware platform. It integrates a BQ24073 battery charger<\/strong>, a dedicated LIS3DHTR 3-axis accelerometer <\/strong>for motion-triggered wake-up, a TXB0102 logic-level translator<\/strong>, an addressable RGB LED<\/strong>, 4 more status LEDs, onboard dual antenna for GSM and GNSS<\/strong>, a USB-C programming port, and a nano-SIM card slot, everything needed for your GPS tracking and remote monitoring projects. <\/p>\n<\/div>\n\n\n\n

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\"GL868
Geolinker GL868 ESP32 Development Board <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n\n\n
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\"open<\/div>

Open Source DNA<\/strong><\/p><\/div>

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Fully open-source hardware and firmware. Access schematics, Gerber files, and firmware to modify, customize, and build your own solutions.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n\n\n

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\"geolinker<\/div>

Geolinker Dashboard<\/strong><\/p><\/div>

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Visualize device location, track routes, and monitor sensor data in real time using the Geolinker GPS dashboard on CircuitDigest Cloud.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

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\"airtel<\/div>

Airtel M2M IoT SIM<\/strong><\/p><\/div>

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Can be purchased with an Airtel IoT M2M SIM card and a 3-month complimentary data plan for instant cellular connectivity and quick deployment.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n\n\n

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\"gsm<\/div>

Integrated GSM & GPS<\/strong><\/p><\/div>

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Built-in GNSS positioning and GSM\/GPRS connectivity enable reliable real-time location tracking and data transmission from anywhere.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

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\"esp32-s3<\/div>

ESP32-S3<\/strong> Powered<\/strong><\/p><\/div>

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Powered by the ESP32-S3 microcontroller, offering high performance, Wi-Fi, Bluetooth connectivity, and rich peripheral support.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n\n\n

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\"arduino<\/div>

Arduino Compatible<\/strong><\/p><\/div>

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Easily program the onboard ESP32-S3 using the Arduino IDE, making development simple for makers, engineers, and researchers.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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<\/span>Specifications<\/strong><\/span><\/h2>\n\n\n\n\n\n