TTGO T-Call V1.4 ESP32 SIM800L Wireless Communication Module

TTGO T-Call V1.4 ESP32 SIM800L is a compact GSM + Wi-Fi + Bluetooth module with built-in SIM800L, ideal for IoT, SMS, call, and remote monitoring applications.

Description

TTGO T-Call V1.4 ESP32 SIM800L Wireless Communication Module

The TTGO T-Call V1.4 is a powerful ESP32-based GSM/GPRS development board integrated with the SIM800L module, designed for reliable wireless communication in IoT, automation, and remote monitoring projects. With built-in Wi-Fi, Bluetooth, and GSM capabilities, this compact module is ideal for applications requiring SMS, voice calls, and mobile data connectivity.

Powered by the dual-core ESP32 microcontroller, the TTGO T-Call offers high performance, low power consumption, and flexible connectivity options, making it perfect for both prototyping and production-level solutions.


Key Features

  • ESP32 dual-core microcontroller with Wi-Fi & Bluetooth

  • Integrated SIM800L GSM/GPRS module

  • Supports SMS, voice calls, and GPRS data

  • Onboard SIM card slot

  • USB Type-C / Micro-USB (varies by batch) for programming & power

  • Low power modes for battery-powered applications

  • External antenna support for better signal reception

  • Arduino IDE & ESP-IDF compatible


Technical Specifications

  • MCU: ESP32 (Dual-Core)

  • GSM Module: SIM800L

  • Network: GSM 850 / 900 / 1800 / 1900 MHz

  • Wireless: Wi-Fi 802.11 b/g/n, Bluetooth 4.2

  • Operating Voltage: 5V (USB) / 3.7V Li-ion battery

  • Interfaces: UART, SPI, I2C, GPIO

  • SIM Type: Micro SIM


Applications

  • IoT & smart monitoring systems

  • GSM-based automation projects

  • Remote data logging

  • Smart agriculture & irrigation control

  • GPS tracking (with external GPS module)

  • Security and alert systems

  • Industrial wireless communication

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