Description Product Description TTGO T-Call V1.3 ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Module for Arduino 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、PWM、I2S、ADC On-board clock 40MHz crystal oscillator Working voltage 2.7V-3.6V Working current About 70mA Sleep current About 1.1mA 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 (esp32 chip) 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 T-Call V1.3 Pin Diagram: Connect the power supply, click to start, after start, click to reset, click twice to shut down. T-Call V1.3 Size Chart:
