T-Call ESP32 Dev Board v1.3 SIM800L GSM WiFi Bluetooth IoT TTGO/LILYGO
Price in Sri Lanka

This is a powerful development board that combines the ESP32 Wi-Fi & Bluetooth SoC with the SIMCOM SIM800L GSM/GPRS module on a single board. This integration provides a high-performance, dual-core processing platform with versatile wireless connectivity, making it ideal for IoT projects requiring cellular communication, such as asset tracking, remote monitoring, and smart home applications without needing local Wi-Fi. It features a USB-C port for easy programming and supports Li-Po battery charging for portable use.

Specifications

• Microcontroller: ESPRESSIF-ESP32 (240MHz Xtensa® dual-core 32-bit LX6)
• Cellular Module: SIM800L GSM/GPRS Quad-band 850/900/1800/1900MHz
• Flash Memory: QSPI flash 4MB / PSRAM 8MB
• SRAM: 520 KB SRAM
• Wireless Protocols:
  • Wi-Fi 802.11 b/g/n
  • Bluetooth v4.2 BR/EDR and BLE standard
• SIM Card Support: Only supports Nano SIM card (2G Network)
• Power Supply: USB 5V/1A
• Battery Support: Built-in Li-Po battery charging circuit (JST Connector 2Pin)
• USB Interface: Type-C
• Modular Interfaces: UART, SPI, SDIO, I2C, PWM, I2S, ADC, DAC
• Working Voltage: 2.7V - 3.6V

Features

• Complete IoT Connectivity: Integrates Wi-Fi, Bluetooth, and 2G GSM/GPRS for versatile networking.
• Dual Power Supply: Supports power via USB Type-C and Li-Po battery, with built-in charging management.
• Communication Options:
  • Send and receive SMS messages
  • Send and receive GPRS data (TCP/IP, HTTP, MQTT)
  • Supports phone calls and audio extension pins (Mic/Speaker)
• High Processing Power: ESP32 dual-core processor accelerates data processing and application development.
• Small Form Factor: Compact design ideal for embedded and remote IoT applications.

NOTE: T-Call SIM800 Series 

**The schematics of the module will change with different batches please refer the above link for more details.**