TTGO T-Call V1.4 ESP32 SIM800L Wireless Communication Module
The TTGO T-Call V1.4 is a compact development board that integrates the powerful ESP32 microcontroller with the SIM800L GSM/GPRS module for cellular-based wireless communication. It is designed for IoT, tracking, remote monitoring, and other communication-focused projects where reliable mobile network connectivity is required. The board combines the processing power, Wi-Fi, and Bluetooth capabilities of the ESP32 with SMS, voice, and GPRS functionality provided by the SIM800L module.

Product Description
This development board allows users to send and receive SMS messages, make voice calls, and transmit GPRS data over cellular networks while simultaneously leveraging the ESP32’s dual-core processor for computation and additional wireless features. The onboard SIM card slot provides easy access to mobile networks. Programming and power supply are handled via a USB interface, and the board supports low-power modes for battery-operated projects. Its compact design makes it ideal for IoT devices, remote monitoring systems, and mobile communication applications.

Key Features
The TTGO T-Call V1.4 features an integrated ESP32 microcontroller with a dual-core processor for high-performance computation. It includes a built-in SIM800L GSM/GPRS module to enable cellular communication for SMS, voice calls, and data transmission. The onboard SIM card slot allows quick network connection. Through the ESP32, the board also supports Wi-Fi and Bluetooth wireless communication. Programming and powering the board is simple via the USB interface. It offers low-power operation for energy-efficient projects and comes in a compact design suitable for IoT, remote monitoring, and mobile applications. The module is compatible with Arduino IDE and other development environments for easy coding and project integration.

Applications
The TTGO T-Call V1.4 is ideal for IoT and smart device projects requiring mobile network connectivity. It is widely used in GPS tracking and asset monitoring systems. The module is suitable for remote monitoring of sensors and devices, mobile communication applications, and data logging over cellular networks. It is also used in SMS- or call-enabled automation projects, emergency alert systems, and other communication-based embedded applications.