DS18B20 Troubleshooting Guide: CRC Errors and Long Runs
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Comparison
| Part | Role | Interface | Verdict | Price |
|---|---|---|---|---|
| DS18B20 (x8) | 1-Wire temp probes (house) | Pi 4 w1-gpio bus, mixed 9/12-bit | yes | — |
| Waterproof DS18B20 probe with stainless steel sleeve, includes 4.7kΩ resistor. Buy the 2-pack. | ||||
| 3M 3811/10 flat ribbon | DQ / power wiring to probes | 2-3 m runs, ~45 pF/m | — | — |
| Jacket print to confirm AWG (listed 26 by distributors, searay noted 28). | ||||
| Raspberry Pi 4 | 1-Wire master + villa collector | dtoverlay=w1-gpio; SQLite timeseries.db | yes | — |
| Used in the running shed build; works reliably. |
Verdict
Pick the part that matches your interface and accuracy needs. If you need humidity, prefer BME280 over BMP180. For long 1-Wire runs, DS18B20 is the most robust choice.
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