Geolinker ESP32 GSM & GPS Cellular IoT Board — CDN-0005
Geolinker ESP32 GSM & GPS Cellular IoT Development Board — Dual-Core with SIM800L and NEO-6M
The Geolinker ESP32 GSM & GPS board combines a powerful ESP32 dual-core microcontroller, a SIM800L GSM/GPRS module, and a NEO-6M GPS receiver on a single PCB. It’s purpose-built for cellular IoT projects that need location tracking, remote data logging, or SMS-based control. With Wi‑Fi, Bluetooth, and quad‑band 2G connectivity, you get flexible communication options in a compact, module-friendly form factor.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ESP32 dual-core 240 MHz |
| GSM/GPRS Module | SIM800L quad-band 850/900/1800/1900 MHz |
| GPS Module | NEO-6M with active antenna support |
| Operating Voltage | 5 V via USB-C or 3.7–4.2 V Li-ion battery |
| I/O Voltage | 3.3 V logic |
| Flash / RAM | 4 MB Flash, 520 KB SRAM |
What You Can Build With This
- Real‑time vehicle tracking system with live coordinates over GPRS
- Remote weather station that sends SMS alerts for rain or wind thresholds
- Battery‑powered asset tracker with geofencing and cloud logging
- SMS‑controlled farm irrigation pump with GPS field mapping
Compatibility
The board works with Arduino IDE, PlatformIO, and MicroPython. Full compatibility with TinyGSM, TinyGPS++, and PubSubClient libraries makes it easy to connect to MQTT brokers or HTTP APIs. It pairs seamlessly with any 3.3 V sensors, relays, or displays you already own.
Wiring Notes
Connect a 3.7 V Li‑ion battery to the JST‑PH socket or power via USB‑C. The SIM800L draws up to 2 A peaks; use a battery capable of 2C discharge or a 5 V / 2.4 A USB supply. Screw on the included GSM and GPS antennas and insert an active 2G SIM card (not included) before powering up.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino IDE?
Yes. Install the ESP32 board package and select “ESP32 Dev Module” from the board manager. The GSM and GPS modules work with standard SoftwareSerial or HardwareSerial libraries.
What SIM card do I need?
Any active 2G SIM with SMS and data plan works. In India, Airtel and Vodafone Idea still support 2G; Jio does not. Use a nano‑to‑micro adapter if necessary.
Does the GPS work indoors?
Direct line‑of‑sight to satellites is required. Indoor use typically fails. Place the GPS antenna near a window or outside for a reliable fix.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items