https://sensorrig.com/tags/troubleshooting/ Recent content in Troubleshooting on SensorRig — Real Raspberry Pi Sensor Monitoring Hugo en-us Tue, 04 Aug 2026 00:00:00 +0000 https://sensorrig.com/posts/ds18b20-crc-errors-short-cable/ Tue, 04 Aug 2026 00:00:00 +0000 https://sensorrig.com/posts/ds18b20-crc-errors-short-cable/ Search for DS18B20 CRC errors and you get one answer: your cable is too long, drop the pull-up to 2.2k. It is good advice and it is repeated everywhere, which is exactly why I want to write about the case where it does not apply. My install is eight DS18B20 probes on a Raspberry Pi 4, wired with 3M 3811/10 ribbon, runs of 2-3 m, spec’d at roughly 45 pF/m. Standard 4.