TTGO T-Call V1.3 ESP32 más Sim800L

Características:

- 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: 78.83 x 28.92 x 8.06 mm
- Weight: 11.77g 
- 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

Proyecto GitHub

Video Introducción (inglés)