I am a big proponent of Geyserwise. But I have two issues where I am staying now: it is a rental property with a concrete roof. This makes installing Geyserwise problematic. There is an old geyser control box where I could fit a WiFi temperature controller (Sonoff geyser controller). However, getting WiFi on the roof will be a bit of a mission.

I have a Sonoff ZigBee bridge that could communicate onto the roof. I have a ZigBee R3 that can switch the geyser's relay. I just need to buy a temperature sensor with a probe and a remote display. Then I should have all the functionality of a Geyserwise and more...right?

@frivan ,

If your geyserwise main unit is located within wifi range (should be, as it is installed in a convenient place), (next to the DB, typically), then I would just equip it with a Geyserwala unit. It's an easy DIY upgrade, and then allows one to control your geyser remotely, or via Home Assistant, if you want more automation capabilities.

BTW, is the relay on the R3 able to handle a geyser? I thought it has a 10A relay.

Edited May 21May 21 by Sidewinder

5 hours ago, Sidewinder said:

BTW, is the relay on the R3 able to handle a geyser? I thought it has a 10A relay.

I am using the R3 to switch the old 20A relay.

6 hours ago, Sidewinder said:

next to the DB, typically

The Geyserwise main unit would probably be installed at the geyser. But running a small wire for the display is not so bad. Financially the Geyserwise and Geyserwala is not better than my solution, specifically because I had some of the components already.

The ZigBee switching works fine but turns out I have a normal bridge and I need a Pro bridge to show the "geyser temperature" remotely. The temperature probe on the end plate is not as effective as with an internal pocket.

The wife wasn't happy when her second bath for the day ran cold.

I started with the thermometer on the element side but it only shows when the element is on:

Going to try the output side of the gryser now.