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- (1) I once found that 1-wire has conflict with I2C. So one troubleshooting trick is to disable I2C. (2) And if you have recently updated buster, w1_therm driver might no longer work. (3) if you have a spare micoSD card, you might like to start with a fresh buster with clean config files, try my little python code, which is copy & run, auto detect and print results. This is to verify that clean config files can still run your 1-Wire hard ware: raspberrypi.stackexchange.com/questions/100203/…. Cheers.tlfong01– tlfong012020-10-15 14:43:32 +00:00Commented Oct 15, 2020 at 14:43
- 1Thx @tlfong01! (1) Understand your suggestion rather well owing to the challenges in reading DHTxx with I2C. :) Disabling I2C on the RPi3 didn't resolve the issue (2) Is there another driver that I could use instead of w1_therm? (3) For the RPi3, started with the March Buster image (owing to personal OCD challenges, installed all other supporting pacakges too) but still no 28- folder under /.../devices. Will retry will new August Buster image and nothing except support for DS18B20 and report back here. Code is not an issue since I have boatloads of variations in Python & C/C++. Kind regards.Matha Goram– Matha Goram2020-10-15 15:44:45 +00:00Commented Oct 15, 2020 at 15:44
- 1Thx again @tlfong01! Your suggestion (3) worked!! I used Aug Buster image & enabled only 1-wire & SSH (for my headless work). Voila, w/o touching any of the existing DS18B20 sensors, I found the three 28- folders under /.../devices. Guess all the updates/upgrades & my other code messed up the 1-wire access to the DS18B20 sensors. Appreciate your nudge & advice. Kind regards.Matha Goram– Matha Goram2020-10-15 19:08:30 +00:00Commented Oct 15, 2020 at 19:08
- How nice to hear the good news! Cheers.tlfong01– tlfong012020-10-16 00:53:24 +00:00Commented Oct 16, 2020 at 0:53
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