TTGO T-Call & PMU ESP32 SIM800L Development Board with AXP192 PMU (Q166)

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：CH9102
• 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 1.1mA
• SIM card:Only supports Nano SIM card
• Working temperature range:-40℃ ~ +85℃
• Size&Weight:78.83mm28.92mm8.06mm(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

More Information:

​Link:https://github.com/Xinyuan-LilyGO/LilyGo-T-Call-SIM800