Description

The TTGO T-Call is a powerful ESP32-based development board with integrated Wi-Fi, Bluetooth, and GSM/GPRS connectivity, featuring the SIM800L module for cellular communication. Ideal for IoT projects, it combines flexibility, efficiency, and global reach, making it perfect for remote monitoring, smart cities, and asset tracking. Its compact design, combined with low power consumption, ensures reliable performance in both urban and off-grid environments.

Key Features & Benefits

• Dual Connectivity: Combines Wi-Fi and GSM/GPRS for versatile communication.
• Compact & Powerful: Includes SIM800L module for cellular support in a small form factor.
• Power Efficient: Deep sleep mode with low consumption (1.1mA) for battery-powered applications.
• Versatile Interfaces: Supports UART, I2C, SPI, and more for easy peripheral integration.
• Easy Setup: AT Command compatibility for straightforward control and configuration.
• Battery Support: 3.7V Li-ion battery support for portable, off-grid use.

Applications

• Remote Monitoring: Perfect for outdoor sensors, environmental monitoring, and agriculture.
• Asset Tracking: Use for real-time location and status tracking over cellular networks.
• Smart Cities: Enable smart infrastructure like traffic management and smart lighting.
• IoT Devices: Ideal for home automation and wearable technology requiring cellular or Wi-Fi communication.

Specifications

• Chipset: ESP32 240MHz dual-core Xtensa® LX6 microprocessor
• Memory:
  • Flash: 4MB QSPI Flash
  • PSRAM: 8MB
  • SRAM: 520 kB
• Power Supply:
  • USB: 5V/1A (via USB Type-C or Micro-USB)
  • Battery: 3.7V Li-ion battery (with JST 2.0mm 2-pin connector)
  • Charging Current: 500mA
• Connectivity:
  • Wi-Fi: 802.11 b/g/n (up to 150Mbps), 2.4GHz – 2.5GHz range
  • Bluetooth: Bluetooth v4.2 (BR/EDR and BLE)
  • Cellular: GSM/GPRS via SIM800L (Nano SIM support)
• Interfaces:
  • UART, SPI, I2C, PWM, ADC, I2S, SDIO
• Security: WPA/WPA2/WPA2-Enterprise, AES/RSA/ECC encryption
• Sleep Mode Current: 1.1mA (Deep sleep mode)
• Reset Button: Yes
• USB to TTL Converter: CP2104 (for easy USB serial communication)
• Onboard Clock: 40MHz crystal oscillator
• Dimensions: 78.83mm x 28.92mm x 8.06mm
• Weight: 11.77g