I apologize if this has already been discussed and I gave up on searching too soon. So I have hass.io installed on an RPI3 with a zwave stick. So far it has been working well, but I’d like to address a scenario. Since hass is running on a RPI3, which does not have a battery backed realtime clock, i…

Not sure when I’ll get to it but I’ll try this when I get a chance. hwclock & fake-hwclock support opened 05:25PM - 14 Aug 17 UTC (UTC) [tetherit] tetherit The Rasp…

For Hassio I think you need to activate I2C from either Dockerfile or package.json. Resin documentation for enabling I2C: https://docs.resin.io/hardware/i2c-and-spi/#i2c I haven’t tried it out yet, but I also have a DS3231 I want to connect. Did you get it working?

I haven’t gotten it to work. I got distracted when I was last working on it and haven’t gotten back to it. I probably won’t work on it tonight but if I’m iced in tomorrow I might give it a shot again.

I know it’s almost 2 years back post. But any one figured a way to configure DS3231 on Pi 3/4? I have few issues with my internet and wanted to go around it’s down times. It’s better to have a hardware RTC to raspberry Pi so that we don’t miss time based automations.

I’m also watching this thread hoping for a solution. I was able to add a DS3231 RTC module to my Pi3B+ running Raspian very easily. It would be great to find a way and utilize the RTC module in hass.io as well.

I have started using home assistant few days ago and for now I am a little bit disappointed how the problem with NTP is handled. It will be great if RTC can be used instead.

Would like to get this working too.

I desperately need this for a smart home display board I am creating for a local college. The board will not have internet access and, since home assistant has started being unreliable to boot without internet access, I need to find a way around it. Surely an rtc would be the way to go.

Plus one on the RTC module. I tried doing a manual installation of Homeassistant on top of Raspberry Pi OS Lite, having setup the RTC first. Now I have to automate the startup of Hass within a virtual python environment. I’d rather just have the RTC work with the standard install.

Hass.io RPI and RTC ds3231

Installation Home Assistant OS

ubergoober (Tom Lynn) February 11, 2021, 6:10pm 12

As it turns out, it’s easier than I thought. Followed the instructions here: