1、Programmable and networked, suitable for portable wearable devices to interact with the environment. 2、Adopt BMA423 chip and triaxial low G acceleration sensor for Bosch's latest generation. 3、Ultra-small design with digital interface. Support 2-bit digital resolution and embedded intelligence. 4、Allow low noise measurement of acceleration in 3 vertical directions to sense wrist tilt. 5、Support label/double label, and make plug 'n' play meter step, especially in wearable devices. Features: 1. Programmable and networked, suitable for portable wearable devices to interact with the environment. 2. Adopt BMA423 chip and triaxial low G acceleration sensor for Bosch's latest generation. 3. Ultra-small design with digital interface. Support 2-bit digital resolution and embedded intelligence. 4. Allow low noise measurement of acceleration in 3 vertical directions to sense wrist tilt. 5. Support label/double label, and make plug 'n' play meter step, especially in wearable devices. Specifications: < Hardware specifications Chipset TTGO T-watch FLASH QSPI flash 16 MB/PSRAM 8 MB FOR SRAM FOR SRAM is 520 kB Key Power Supply IO36 Role USB to TTL CP2104 Modular interface for UART/SPI/SDIO/I2C/LED PWM ... PWM/I2S/IRGPIO/touch sensor/ADC/DACLNA Onboard clock 40mhz crystal oscillator Operating voltage 2.7 V- 3.6 V Operating current 70mA Sleep current 3mA Operating temperature range -40℃  - + 85℃ Power supply specification power supply USB 5 V / 1A Charging current 500 mA Battery 3.7V Lithium Battery Display screen 1.54 inch LCD capacitive touch screen Sensor BMA423 Triaxial Accelerometer, Built-in Step Count Algorithm, Activity Recognition/Tracking, Advanced Gesture Recognition RTC clock PCF8563 Wi-FI standard FOR FCC / CE-RED / IC / TELEC / KCC / SRRC / NCC Protocol 802.11b/g/n ( 802.11n, speed up to 150 Mbps)A-MPDU and A-MSDU aggregation, allowing 0.4μS protection interval Frequency range 2.4 GHz~ 2.5 GHz（2400 M~ 2483.5 M） Transmission Power 22dBm Output Communication distance 300 meters Bluetooth Protocol Comply with bluetooth v 4.2BR/EDR and BLE standards. RF NZIF Receiver class-1, class-2 and class-3 Transmitters AFH with RF Sensitivity of -97dBm Audio for CVSD and for SBC audio Software specification Wi-Fi mode for Station/SoftAP/SoftAP+Station/P2P Security mechanism WPA / WPA2 / WPA2-Enterprise / WPS Encryption type AES / RSA / ECC / SHA Firmware Update Downloads UART/OTA (Downloads and Writes Firmware via Network/Host) Software development supports the development for cloud server/SDK for user firmware development. Network protocols IPv4, IPv6, SSL, for TCP / UDP / HTTP / FTP / MQTT User Configuration for AT+Instruction Set, Cloud Server, for android/iOSapp OS for FreeRT OS Built-in lithium battery 180mah Recommended for: 1. Steps counter in wearable devices. 2. Wake up the display when the wrist is tilted. 3. Realize low power user interaction through tab/double tab. 4. Advanced gesture recognition. 5. Activity identification/tracking. 6. Advanced power management for mobile devices. 7. Tilt compensation of electronic compass. Package List: 1 * Watch 1 * Dust-free cloth 1 * Charging Cable 1 * Watch Strap 1 * Extension board 1 * Data cable 1 * Screwdriver 1 * User manual