Connecting a DHW cylinder temperature probe to emonHP

Hi, I’ve just installed an emonHP Level 3 heatpump monitoring system (very happy so far!). I have a cylinder with temperature probes at the bottom (for solar thermal) and the middle (for the heatpump), but nothing at the top (there’s a pocket), and I’d like to monitor that. This post suggests the OEM encapsulated DS18B20 sensor, and there are instructions for connecting via RJ45 to an emonPI, but the emonHP has no RJ45 socket. What’s the best way forward here?

Solved/Duplicate See Add temp sensors to EmonHP - #22 by Robert.Wall