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
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ESP32 dual-core microcontroller with Wi-Fi & Bluetooth
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Integrated SIM800L GSM/GPRS module
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Supports SMS, voice calls, and GPRS data
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Onboard SIM card slot
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USB Type-C / Micro-USB (varies by batch) for programming & power
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Low power modes for battery-powered applications
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External antenna support for better signal reception
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Arduino IDE & ESP-IDF compatible
Technical Specifications
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MCU: ESP32 (Dual-Core)
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GSM Module: SIM800L
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Network: GSM 850 / 900 / 1800 / 1900 MHz
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Wireless: Wi-Fi 802.11 b/g/n, Bluetooth 4.2
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Operating Voltage: 5V (USB) / 3.7V Li-ion battery
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Interfaces: UART, SPI, I2C, GPIO
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SIM Type: Micro SIM
Applications
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IoT & smart monitoring systems
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GSM-based automation projects
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Remote data logging
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Smart agriculture & irrigation control
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GPS tracking (with external GPS module)
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Security and alert systems
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Industrial wireless communication
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