LILYGO T-Call V1.4
ESP32 development board with SIM800L 2G GSM/GPRS cellular modem, Wi-Fi, Bluetooth 4.2, USB-C charging, and Li-Po battery connector for IoT devices requiring SMS and GPRS data connectivity.
$16.51
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Specifications
Components
Dual-core Xtensa LX6 at 240MHz with Wi-Fi b/g/n and Bluetooth 4.2 BR/EDR+BLE
Quad-band 2G GSM/GPRS modem supporting SMS, voice calls, and GPRS data
Li-Po battery charging and power path management IC
CH9102 USB to UART bridge chip for programming
Bus Interfaces
Overview
The LILYGO T-Call V1.4 pairs an ESP32 microcontroller with a SIM800L 2G GSM/GPRS modem for cellular communication in regions with 2G coverage. It provides SMS messaging, voice call capability (with microphone/speaker pin extension), and GPRS data connectivity alongside the ESP32's Wi-Fi and Bluetooth 4.2. The board includes a USB-C port for programming and charging, a JST PH 2-pin connector for a Li-Po battery (managed by IP5306), and CH9102 USB-to-serial chip. It is available in 4MB and 16MB flash variants. An A7670E 4G LTE variant is also available on the same board form factor for regions where 2G has been sunset.
Use Cases
5Cellular IoT
Devices designed for IoT deployments using cellular (2G/3G/LTE) connectivity where WiFi is unavailable.
SMS Alerts
Send SMS text message alerts and notifications using cellular modems for remote monitoring.
Remote Monitoring
Monitor remote equipment, environments, or systems over cellular or wireless networks without on-site presence.
Asset Tracking
Tracking the location and status of physical assets like vehicles, packages, and equipment.
GSM Data Logger
Data loggers that transmit sensor readings over GSM/GPRS cellular networks.
Where to Buy
Available Software
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