To complete this tutorial, you need the following parts: If you have any suggestions, corrections, improvement ideas, or other feedback about this tutorial, I’d love to hear about them at Parts needed The end result of this tutorial is this neat little device that measures three different temperatures and is able to output them both wirelessly using the Signal K protocol and over NMEA 2000. One SH-ESP32 can support as many temperature sensors as can be practically connected to it. I have had a similar setup for several years and it gives me an extra peace of mind: I would get an early alarm if the temperature would begin to rise (I’ve had coolant issues in the past), and also if I ever would forget to open the water intake seacock, I would get an alarm of rising exhaust temperature before anything irreversible could happen. My own engine is a Yanmar 3GM30F but the approach is completely generic and can be adapted to any engine. This tutorial will walk you through creating a temperature sensing device that can be used for example to measure engine oil, coolant, and wet exhaust temperatures of of any engine that doesn’t already report these temperatures to Signal K or your N2K network. 1-Wire temperature sensing Table of contents
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