TTGO T_Call V1.3 ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Module ESP32_WROVER_B

Product Description 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 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 0.4?S 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 mechanismWPA/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