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September 21, 2019

TTGO T-Call ESP32 + GPRS

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TTGO T-Call V1.3 ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Module

Hardware Specifications 
ChipsetESPRESSIF-ESP32 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor
FLASHQSPI flash 4MB / PSRAM  8MB
SRAM 520 kB SRAM
ButtonReset
USB to TTLCP2104
Modular interfaceUART, SPI , SDIO , I2C , LED PWM , TV PWM , I2S , IRGPIO , capacitor touch sensor , ADC , DAC LNA  pre-amplifier
On-board clock40MHz crystal oscillator 
Working voltage2.7V-3.6V
Working currentAbout 70mA
Sleep currentAbout 300uA
SIM cardOnly supports Nano SIM card
Working temperature range-40℃ ~ +85℃
Size&Weight78.83mm*28.92mm*8.06mm(11.77g)
Power Supply Specifications 
Power SupplyUSB 5V/1A
Charging current500mA
Battery3.7V lithium battery
JST Connector2Pin 1.25mm
USBType-C
 Wi-Fi 
StandardFCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
Protocol802.11 b/g/n(802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4μS Protection interval
Frequency range2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power22dBm
Communication distance300m
 Bluetooth 
Protocolmeet bluetooth v4.2BR/EDR and BLE standard
Radio frequencywith -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
Audio frequencyCVSD&SBC audio frequency
Software specificationDescription
Wi-Fi ModeStation/SoftAP/SoftAP+Station/P2P
Security mechanismWPA/WPA2/WPA2-Enterprise/WPS
Encryption Type AES/RSA/ECC/SHA
Firmware upgradeUART download/OTA(Through network/host to download and write firmware)
Software DevelopmentSupport cloud server development /SDK for user firmware development
Networking protocolIPv4、IPv6、SSL、TCP/UDP/HTTP/FTP/MQTT
User ConfigurationAT + Instruction set, cloud server, android/iOSapp
OSFreeRTOS

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

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