A curated list of resources, examples, documentations, and other things concerning the LILYGO® TTGO T-Watch-2020.'
SP-IDF (native SDK), Arduino, Lua, MicroPython, Scratch
Chipset:ESP32, dual-core MCU, PMU power management
FLASH:QSPI flash 16MB
SRAM:520 KB SRAM / PSRAM 8MB
Button:Power key
USB to TTL:CP2104
On-board clock:40MHz crystal oscillator
Working voltage:2.7V-3.6V
Working current
Sleep current
Working temperature range:-40℃ ~ +85℃
Weight:58.5g
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:Micro USB (5V/1A)
Charging current:The charging current is programmable and self-adjustable
Battery：lithium battery
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：2.4GHz2.5GHz(2400M2483.5M)
Transmit Power：22dBm
Communication distance：300m
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\
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
CP2104 driver - Windows 10 should get this automagically, but if not, here it is
Espressif Documentation - Comprehensive and up to date list of Espressif documentation files
Espressif Arduino ESP32 Library Git Repository
Espressif ESP IDF Git Repository - ESP-IDF is the official development framework for the ESP32 and ESP32-S Series SoCs.
Espressif ESP IDF Programming Guide
LVGL - LVGL is used in the examples and in the documentation
PCF8563 Datasheet - Real-time clock/calendar
BMA423 - Digital, triaxial acceleration sensor
ST7789V - 1.54" LCD capacitive touch screen
FT6236U - Touch screen chip
AXP202 - Power Management Unit
Max98357a - I2S PCM input Class D audio amplifier
CP2104 - USB-to-UART bridge (?)
https://www.instructables.com/id/Lilygo-T-Watch-2020-Arduino-Framework/
Getting Started with Lua Language on ESP32
My-TTGO, Watch firmware + online configurator:
How to make use of ESP32 internal RTC to setup Epoch time?
