How to integrate a temperature sensor that only sends email alerts

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1

I would like to have a temperature sensor trigger a wifi controlled relay. I’m looking at cheap WiFi enabled temperature sensors such as https://uk.rs-online.com/web/p/data-loggers/1993854

But it seems that the only interface to the temperature is the alert email it sends when either the upper or lower temperature is reached. How would I go about having HA read and parse and email and then generate an event that it could then use to trigger the relay? I did a quick search on HA but the only thing that came up was mailgun - but it seems like overkill for an apparently simple task.

Thanks for your time, Ian

2

I am having troubles understanding why you aim for email, there are other sensors like tuya, shelly, sonoff.

3

You could use the imap content integration, but I definitely wouldn’t call that sensor “cheap” at 40 quids, so I would look for alternatives :wink:

4

It sounds like I need to do more research on the sensors available. I don’t want to have emails but it was just the output from the sensor I found. I’ll come back after doing some more homework. Thanks for the steer.

5

You can also build one with esphome …cheap… but you need to want to do this too :slight_smile:

The best Wi-Fi temperature and humidity sensors for Home Assistant (home-assistant-guide.com)

Wifi temp sensors that are compatible with HASSIO? - Hardware - Home Assistant Community (home-assistant.io)

6

I was surprised too. I thought it would be just some standard WiFi chip with a sensor bolted on. If I felt a bit more confident about the electronics I guess I could make my own.

The accutal sensor bit needs to be on a probe as it has to go down a tube into a hot water tank.

7

Mmm… I wouldn’t quite trust wifi in those conditions, tbh…
I’m pretty sure water absorbs 2.4GHz.

8

You can try to buy a cheap (really cheap) device and replace the sensor with this
https://fr.aliexpress.com/item/32458793787.html?spm=a2g0o.order_list.order_list_main.135.385c5e5bBydxd5&gatewayAdapt=glo2fra

Of use the same with esphome

EDIT:

https://fr.aliexpress.com/item/1005005050170069.html?spm=a2g0o.productlist.main.3.4de33580yiEArf&algo_pvid=4fddfc3d-b448-4dac-9046-8480b7a00818&algo_exp_id=4fddfc3d-b448-4dac-9046-8480b7a00818-1&pdp_ext_f={"sku_id"%3A"12000031454433134"}&pdp_npi=3%40dis!EUR!8.98!4.66!!!!!%402102111816796751479071661d0716!12000031454433134!sea!FR!913947479&curPageLogUid=43Xb6msn0Hdy

9

Thanks all, I’ve gone for the sonoff as that combines the relay with the sensor which simplifies everything. I had a spare ewelink so I was thinking I could use it as my relay but less moving parts is better.