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2pcs LILYGO® TTGO T-Call V1.3 ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Board

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                  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:

                  2 x T-Call V1.3
                  2 x Power cord
                  4 x Pin header
                  2 x GPRS antenna (9cm)

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