TTGO T-Call ESP32 SIM800L Module for IoT & GSM Projects
TTGO T-Call ESP32 SIM800L Wireless Module – GSM & IoT Development Board
The TTGO T-Call ESP32 SIM800L is a versatile development board that combines the powerful ESP32 microcontroller with an integrated SIM800L GSM/GPRS module. This allows your projects to make voice calls, send SMS messages, and transmit data over cellular networks, extending connectivity beyond Wi-Fi range. Perfect for remote monitoring, asset tracking, and IoT applications where internet access isn't always available.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ESP32 WROVER-B (Dual-core, 240MHz) |
| GSM/GPRS Module | SIM800L (Quad-band 850/900/1800/1900 MHz) |
| Bluetooth & Wi-Fi | 802.11 b/g/n + BT 4.2 |
| USB to Serial | CH9102F |
| Power Input | 5V via USB or 3.7V Li-Po (JST connector) |
| GPIO Pins | Multiple (with I2C, SPI, UART, etc.) |
What You Can Build With This
- SMS alert system for home security or industrial monitoring.
- GPS tracker using an external GPS module and SIM800L for location data over GPRS.
- Remote weather station that uploads data via GSM when Wi-Fi is unavailable.
- Voice-controlled IoT appliance using GSM calls for control in areas without internet.
Compatibility
This board works with the Arduino IDE and MicroPython. It is compatible with standard ESP32 libraries and the TinyGSM library for SIM800L. Works with 3.3V logic; use level shifters if interfacing with 5V sensors. Pairs well with GPS modules like NEO-6M, sensors (DHT22, BME280), and relay modules.
Wiring Notes
Connect the included GSM antenna and a SIM card (2G compatible). The SIM800L module communicates with the ESP32 via Serial2 (RX2/TX2). Ensure a stable power supply; the GSM module can draw up to 2A peaks. A Li-Po battery on the JST connector is recommended for mobile projects.
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, it is fully compatible with the Arduino IDE. You can program it using the ESP32 board package and the TinyGSM library for SIM800L functions.
Does it come with a SIM card?
No, the SIM card is not included. You'll need an active 2G SIM card with a suitable data or call plan from your local carrier.
Can I use it for GPS tracking?
Yes, you can connect an external GPS module like NEO-6M via serial pins. The SIM800L can then send location data over GPRS to a server or via SMS.
📦 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.
What you can build with this
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