TTGO T-Call V1.4 ESP32 SIM800L GSM Module
The TTGO T-Call V1.4 is a powerful development board that combines the ESP32 dual-core processor with the SIM800L GSM/GPRS module, enabling both Wi-Fi/Bluetooth and cellular connectivity in a single compact board. Perfect for IoT projects that require mobile network communication.
Key Features
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ESP32 Dual-Core Processor: Xtensa LX6, up to 240 MHz with Wi-Fi 802.11 b/g/n and Bluetooth 4.2/BLE
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SIM800L GSM/GPRS: Quad-band GSM (850/900/1800/1900 MHz) with GPRS Class 10 for data and SMS
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SIM Card Slot: Nano SIM card support for cellular connectivity
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Call & SMS Support: Make and receive calls, send and receive SMS messages
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GPRS Data: Send HTTP/MQTT data over cellular networks
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Li-Po Battery Connector: Onboard charging circuit for portable, battery-powered deployments
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USB-C Interface: Modern USB-C for programming and power
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Onboard Antenna: GSM antenna connector included
Specifications
- MCU: ESP32 (Dual-core, 240 MHz)
- GSM Module: SIM800L
- GSM Bands: 850/900/1800/1900 MHz
- GPRS: Class 10, max 85.6 kbps
- SIM: Nano SIM
- Flash: 4MB
- Operating Voltage: 3.3V / 5V via USB-C
- Battery: 3.7V Li-Po via JST connector
Ideal For
- Remote IoT monitoring over GSM networks
- GPS + GSM tracking devices
- SMS-based alert and notification systems
- GPRS data logging to cloud servers
- Smart agriculture and field sensor deployments
- Emergency communication devices
The TTGO T-Call V1.4 bridges the gap between Wi-Fi and cellular IoT — program it with Arduino IDE or ESP-IDF and deploy it anywhere with GSM coverage.