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°C ~ +85°C

Size&Weight : 78.83mmx28.92mmx8.06mm(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

Shipping List

T-Call V1.3 x1

Power Cord x1

Pin Header x2

Gprs Antenna x17cm)

Power Cable x1

1. Datasheet – CMU TTGO T-CALL ESP32+SIM800L

Device	Wireless Module
Type	TTGO T-Call V1.3 ESP32