TTGO T-Watch-2020 ESP32 Main Chip 1.54 inch Touch Display Programmable Wearable Watch (Black) About The Product Hardware Specifications 1. Chipset: ESP32, dual-core MCU, PMU power management 2. FLASH: QSPI flash 16MB 3. SRAM: 520 KB SRAM PSRAM 8MB 4. Button: Power key 5. USB to TTL: CP2104 6.On-board clock: 40MHz crystal oscillator 7. Working voltage: 2.7V-3.6V 8. Working temperature range: -40 degree C ~ +85 degree C 9. Weight: 58.5g 10. Display: 1.54 inch LCD capacitive touch screen 11. Sensor: BMA423 three-axis accelerometer, built-in step counting algorithm, activity recognition tracking, advanced gesture recognition. 12. RTC clock: PCF8563 Power Supply Specifications 1. Power Supply: Micro USB (5V1A) 2. Charging current: The charging current is programmable and self-adjustable 3. Battery: Lithium battery (not included) Wi-Fi 1. Standard: FCCCE-REDICTELECKCCSRRCNCC(esp32 chip) 2. Protocol: 802.11 bgn(802.11n, speed up to150Mbps)A-MPDU and 3. A-MSDU polymerization, support 0.4uS Protection interval 4. Frequency range: 2.4GHz~2.5GHz(2400M~2483.5M) 5. Transmit Power: 22dBm 6. Communication distance: 300m Bluetooth 1. Protocol: Meet bluetooth v4.2BREDR and BLE standard 2. Radio frequency: With -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH 3. Audio frequency: CVSD&SBC audio frequency Software specification 1. Wi-Fi Mode: StationSoftAPSoftAP+StationP2P 2. Security mechanism: WPAWPA2WPA2-EnterpriseWPS 3. Encryption Type: AESRSAECCSHA 4. Firmware upgrade: UART downloadOTA???Through networkhost to download and write firmware 5. Software Development: Support cloud server development SDK for user firmware development 6. Networking protocol: IPv4, IPv6, SSL, TCP, UDP, HTTP, FTP, MQTT 7. User Configuration: AT + Instruction set, cloud server, androidiOS app 8. OS: FreeRTOS T-Watch Function Configuration 1. Main chip: ESP32 2. 1.5