1-wire Bus Since Version 21.02.0 - OpenWrt Forum

1-wire bus since version 21.02.0 Talk about Documentation maxv November 9, 2021, 12:34pm 1

hello, I am using raspberry pi 4 b with openwrt + trying to connect several 1-wire sensors. according to this tutorial https://openwrt.org/docs/techref/hardware/port.gpio/1-wire to use a 1-wire bus u should install the w1-gpio-custom package. This package was available in 19.07.8 release but since version 21.02.0 it is missing. So, how to use 1-wire now? Has anyone tried to use 1-wire with version bigger or equal to 21.02.0?

Pico November 12, 2022, 5:00pm 2

had the same issue, no solution currently.

Package was removed due to faults and missing maintainer.

22.03, Raspberry 4B, reading DS18B20 temp sensors Installing and Using OpenWrt

Update: I did not succeed with a solution, but after some more research, I think I have now at least a better understanding of the problem context: The raspberry GPIO (and likely also the GPIO pins of other boards) offers different external IO protocols: SPi i2c 1wire The temp sensor DS18B20 I am talking about needs the 1wire protocol, which seems not supported/maintained any more in OpenWRT, the OpenWRT wiki lists SPI and i2c only: https://openwrt.org/toh/raspberry_pi_foundation/raspberry_p…

Pico July 9, 2023, 4:56pm 3

I now had success reading 1-wire temp sensors on a Raspberry Pi Zero on 22.03.5

Here are my notes:

22.03, Raspberry 4B, reading DS18B20 temp sensors Installing and Using OpenWrt

Good news. This weekend I had unexpectedly many lucky punches: I did not achieve anything helpful in real life, but I tried again with 1-wire and found, how to successfully access 1-wire temp sensor values via OpenWRT 22.03.5 on a Raspberry Zero! (I guess the same steps should also work identical for OpenWRT 23.05) In other words: I found by coincidence that 1wire and Raspberry GPI thermal sensors now work in OpenWrt (not sure if it was ever broken and fixed or just confusing do…

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