TTGO T-Call v1.3 v1.4 ESP32 Wireless Module & SIM800L GPRS Module (with Antenna)

TTGO T-Call v1.3 v1.4 ESP32 Wireless Module & SIM800L GPRS Module (with Antenna) is a custom ESP32 (ESP-WROVER-B 8MB PSRAM) based development board with an on-board 2G/GPRS Module SIM800L. The USB Type C pluggable board also has an on-board LiPo Battery Charging Circuit & Connector and is a good choice for building IoT applications.

Hardware Specifications :

• Chipset ESPRESSIF-ESP32 240MHz Xtensa® single-/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 preamplifier
• 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°C ~ +85°C
• 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 Description :

• Standard FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
• Protocol 802.11 b/g/n (802.11n, speed up to 150Mbps) 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 Description :

• 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 Description :

• 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/iOS app
• OS FreeRTOS

Package Includes:

• 1 x TTGO T-Call v1.3 ESP32 Wireless Module & SIM800L GPRS Module

Note : 

• Kindly note that image is for reference only. Model and version no. Printed on PCB might differ.