ESP32 SIM800L GSM Module

he TTGO T-Call is a new ESP32 development board that combines a SIM800L GSM/GPRS module. The new board combines ESP32 WiFi & Bluetooth WiSoC with SIMCom SIM800L GPRS module, and also happens to rely on a USB-C port for power and programming instead of the more common micro USB port on this type of hardware. It can also be a standalone board with a built-in battery charging that supports up to 500mA.

Besides Wi-Fi and Bluetooth, you can communicate with this ESP32 board using SMS or phone calls and you can connect it to the internet using your SIM card data plan. This is great for IoT projects that don’t have access to a nearby router.

• ESP32 chip (WROVER module) (240Mhz dual core processor)
• Built-in Wi-Fi
• Built-in Bluetooth
• Built-in SIM800L GSM GPRS module
• Built-in power management chip (IP5306) with Li-ion/Li-Po battery charging circuit (charge up to ~2A)
• Built-in micro Nano Sim card connection
• Battery connector: 2p Molex Picoblade

• Chipset	ESPRESSIF-ESP32 240MHz Xtensa® dual-core 32-bit LX6 microprocessor
  FLASH	QSPI flash 4MB / PSRAM  8MB
  SRAM	520 kB SRAM
  Button	Reset
  USB to TTL	CP2104
  Modular interface	UART, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, capacitor touch sensor, ADC, DACLNA  pre-amplifier
  On-board clock	40MHz crystal oscillator
  Working voltage	2.7V-3.6V
  Working current	About 70mA
  Sleep current	About 300uA
  SIM card	Only supports Nano SIM card
  Working temperature range	-40℃ ~ +85℃
  Size&Weight	78.83mm*28.92mm*8.06mm(11.77g)