TTGO T-Watch | Details

TTGO T-Watch Programmable And Networked Open Source Smart Watch That Interacts With The Environment As A Wearable Device

VIDEO:

Product Features

Main chip: ESP32, dual core MCU (integrated dual mode Bluetooth/wifi), PMU power management
Display: 1.54 inch LCD capacitive touch screen
Sensor: BMA423 three-axis accelerometer, built-in step counting algorithm, activity recognition / tracking, advanced gesture recognition, etc.
GPS module: Quickly locate the current position using the Sony CXD5603GF module
Lora module: a new generation of popular wireless communication technology
Combination kit: lithium battery, design open mold, and thick strap, and black and white
Development platform: ESP-IDF (native SDK), Arduino, Lua, MicroPython, Scratch

Hardware Specifications
Chipset	ESP32, dual-core MCU, PMU power management
FLASH	QSPI flash 16MB / PSRAM 8MB
SRAM	520 kB SRAM
Button	power key , IO36
Extended function
USB to TTL	CP2104
Modular interface	UART、SPI、SDIO、I2C、LED PWM , PWM、I2S、IRGPIO、capacitor touch sensor、ADC、DACLNA
On-board clock	40MHz crystal oscillator
Working voltage	2.7V-3.6V
Working current	about 70mA
Sleep current	about 3mA
Working temperature range	-40℃ ~ +85℃
Size&Weight	46.474320.4mm 43.19g
Display:	1.54 inch LCD capacitive touch screen
Sensor:	BMA423 three-axis accelerometer, built-in step counting algorithm, activity recognition / tracking, advanced gesture recognition.
RTC clock :	PCF8563
Power Supply Specifications
Power Supply	USB 5V/1A
Charging current	500mA
Battery	3.7V lithium battery
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 0.4μS 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（>span class="font5">）
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

Appearance Specifications

T-Watch onboard:
1.54 inch LCD capacitive touch screen: ST7789V
Touch screen chip: FT5206
Three-axis accelerometer: BMA423
PMU power management: AXP202
RTC clock module: PCF8563

Expand the interface:
Support microphone: MSM261S4030H0
Support SPI TF memory card
2 digital I/Os: GPIO25, GPIO26 (supports ADC, DAC)
Support I2C, UART, SPI communication protocol

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model1

Component Layout

model2 model3 Product Pins

model4

More Information:https://github.com/Xinyuan-LilyGO/TTGO-T-Watch

https://t-watch-document-en.readthedocs.io/en/latest/index.html

Product Details

Accelerometer
• Chip: BMA423
• Latest generation triaxial, low-g acceleration sensor from Bosch
• ultra-small
• digital interfaces
• 2 bit digital resolution and embedded intelligence,
• allows low-noise measurement of accelerations in 3 perpendicular and thus senses wrist
tilt, tab/double tab and enables plug ’n’ play step counting especially in wearable devices.
Recommended for
- Step-counting in wearable devices
- Wake up display on wrist tilt
- Low power user interaction by tab/double tab
- Advanced gesture recognition
- Activity recognition/tracking
- Advanced power management for mobile devices
- Tilt compensation for electronic compass

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