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Frank dae6de76f1 Improve co-existence of usermods sharing I2C

Improve co-existence of several popular usermods with respect to shared I2C bus.
- ensure that i2c_sda and i2c_scl are used when defined
- ensure that HW_PIN_SDA / HW_PIN_SCL are not overwritten
- ensure that Wire.begin()nis always called with user-defined pins (remove rogue Wire.begin() without parameters)
- ensure that set.cpp / cfg.cpp use esp32-specific global Wire objects.

2022-12-17 19:45:45 +01:00

readme.md

Spelling check by @wthomson (#2940 )

2022-12-10 16:12:55 +01:00

usermod_rtc.h

Improve co-existence of usermods sharing I2C

2022-12-17 19:45:45 +01:00

readme.md

DS1307/DS3231 Real time clock

Gets the time from I2C RTC module on boot. This allows clock operation if WiFi is not available. The stored time is updated each time NTP is synced.

Installation

Add the build flag -D USERMOD_RTC to your platformio environment.