Description
The TTGO T-Call V1.4 is a powerful wireless IoT development board that combines the popular ESP32 microcontroller with a built-in SIM800H GSM/GPRS module, enabling cellular connectivity for remote IoT applications. This version features the CH9102F USB-to-Serial chip, offering improved stability and compatibility over previous models.
Designed for advanced IoT development, the T-Call V1.4 supports WiFi, Bluetooth, and GSM/GPRS communication, making it ideal for smart agriculture, GPS tracking, SMS control systems, remote sensors, and more. It also includes a SIM card slot and antenna interface for easy integration into cellular networks.
Technical Specifications
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Main Chipset: ESP32 (Dual-core 32-bit MCU + WiFi + Bluetooth)
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Cellular Module: SIM800H GSM/GPRS (Quad-Band 850/900/1800/1900 MHz)
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USB Interface: CH9102F USB-to-Serial Chip
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SIM Card Slot: Micro SIM (2G support only)
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Power Supply: 5V via USB Type-C or external battery
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Operating Voltage: 3.3V (ESP32 logic level)
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GPIO Pins: Multiple available for I2C, SPI, UART, ADC, PWM
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Antenna Interface: U.FL connector for external GSM antenna
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Flash Memory: 4MB
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Battery Connector: JST 2-pin for Li-Ion/Li-Po battery
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Dimensions: Approx. 50mm × 28mm
Package Includes
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1 × TTGO T-Call V1.4 ESP32 Development Board with SIM800H
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1 × GSM Antenna
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1 × JST Battery Connector (pre-soldered)
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1 × Micro SIM card slot (pre-installed)
Applications
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IoT and M2M communication systems
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SMS-based automation or alert systems
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GPS and GSM-based vehicle or asset tracking
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Smart agriculture and irrigation systems
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Remote environmental monitoring
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WiFi-GSM fallback communication modules
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Home automation with cellular backup
