TTGO T-Call ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Board

Feature:

Hardware Specifications
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)
Power Supply Specifications
Power Supply	USB 5V/1A
Charging current	500mA
Battery	3.7V lithium battery
JST Connector	2Pin 1.25mm
USB	Type-C
Wi-Fi
Standard	FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
Protocol	802.11 b/g/n(802.11n, speed up to150Mbps)A-MPDU and A-MSDU polymerization, support 0.4μS Protection interval
Frequency range	2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power	22dBm
Communication distance	300m
bluetooth
Protocol	meet bluetooth v4.2BR/EDR and BLE standard
Radio frequency	with -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
Audio frequency	CVSD&SBC audio frequency
Software specification
Wi-Fi Mode	Station/SoftAP/SoftAP+Station/P2P
Security mechanism	WPA/WPA2/WPA2-Enterprise/WPS
Encryption Type	AES/RSA/ECC/SHA
Firmware upgrade	UART download/OTA(Through network/host to download and write firmware)
Software Development	Support cloud server development /SDK for user firmware development
Networking protocol	IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT
User Configuration	AT + Instruction set, cloud server, android/iOSapp
OS	FreeRTOS

More Information: https://github.com/Xinyuan-LilyGO/TTGO-T-Call

Package includes:

There’s limited information about the board, and basically, all we got is this Github repo with a link to an Arduino sample, library to control Seeduino GPRS, as well as datasheets and AT commands set for SIM800. Checking out Seeeduino GPRS Wiki may help getting started with TTGO T-Call board.

The board ships with wires for a battery, the headers, and a 9cm GPRS antenna.