TTGO T-Call Development board (WIFI+GPRS SIM800L+TTGO+BLUETOOTH)- V1.3
This is an ESP32 based development board integrated with TTGO point to point wireless communication module, Bluetooth and GPRS SIM800L module. If you are searching for long-range communication along with GPRS network modules, this development board is suitable for your project. This board comes with TTL logic chip and can directly connect to the computer using Type C cable for programming. There is also a 2 pin JST connector for battery connection.
Specifications:
- Chipset: ESPRESSIF-ESP32
- Flash: PSRAM 8MB
- SRAM: 520kB SRAM
- Modular interface: I2S, IRGPIO, Capacitor touch sensor, ADC, DACLNA preamplifier
- Onboard clock: 40MHz crystal oscillator
- Working Voltage: 2.7V-3.6V
- Operating current: about 70mA
- Sim card: Only supports Nano version of the sim card
- Working temperature: -40C to +85C
- Size: 78.83mm x 28.92mm x 8.06mm
- USB connection: Type-C
- JST connector for battery input: 1.25mm 2 pin
- OS: FreeRTOS
WIFI Module specifications:
- Standard: 802.11 b/g/n
- Protocol: MPDU and A-MSDU polymerization
- Frequency range: 2.4GHz to 2.5GHz
- Transmit power: 22dBm
- Communication distance: 300mts
Bluetooth Specifications:
- Protocol: V4.2 BR/EDR and BLE standard
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