Simple Micro Dot pHAT Arduino library
Copyright (C) 2020 Martin Lukasek martin@lukasek.cz
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.
Connect 5V (pin 2 or 4) of Micro Dot pHAT to 5V pin of M5Stack
Connect GND (pin 6) of Micro Dot pHAT to GND pin of M5Stack
Connect SDA (pin 3) of Micro Dot pHAT to SDA pin of M5Stack (GPIO 21)
Connect SCL (pin 5) of Micro Dot pHAT to SCL pin of M5Stack (GPIO 22)
https://github.com/clarktans/microdot-clock
TimeNTP_ESP8266WiFi.ino
Example showing time sync to NTP time source
Modify the library to support four IS31FL3730 matrix driver chips (I2C addresses 0x60, 0x61, 0x62, and 0x63) on a custom board for total 8 digits.