Add temp sensors to EmonHP

Zarch · 2022-09-26T11:04:09.089Z

Out of curiosity, what hardware is inside the emonHP?

Gwil · 2022-09-26T12:31:06.864Z

There’s a Raspberry Pi inside that aluminium case, with a small breakout board to access the ports from the outside.

glyn.hudson · 2022-09-26T13:47:20.277Z

glyn.hudson:

I’ll have to check if the RFM69Pi will fit in the emonHP enclosure

Sorry, I’m afraid the RMF69Pi doest fit inside the emonHP enclosure.

However, the new RFM69CW direct to RasPi board that @TrystanLea has been working on should fit, this board is not yet in production, but we may have a few to spare. However, since we’re currently out of stock of emonTH this is not very useful, but will be in the future!

Direct RFM69 to Pi via SPI Hardware

So far with both the emonPi and the rfm69pi boards, we’ve interfaced with the RFM69cw radio module via a microcontroller in the middle. Others have however taken a different and simpler approach of linking the Pi to the RFM69cw module directly e.g: rpi-rfm69 · PyPI (wrapper for the low power labs library) With our in progress shift away from using the JeeLib library towards using hardware buffering and a native packet format, the code for reading packets from the module is also much simplified…

It’s also possible to connect a DS18B20 direct to the raspberryPi with the addition of a single resistor:

EmonHub has support for reading direct from DS18B20: emonhub/conf/interfacer_examples/DS18B20 at master · openenergymonitor/emonhub · GitHub

Halsteads · 2022-09-26T17:55:48.446Z

thanks Glyn,
Given that all of this will be located within a 19" wall-mounted rack case with glass door, containing RJ45 patchbay, unmanaged switch, etc. then maybe that’s not an issue?
I’m happy to install a dedicated rack shelf for the OEM kit and interconnect myself.
What do you think?

Halsteads · 2022-09-27T09:03:26.646Z

BTW the tank and probes are ~10m from emonHP. Hence thinking hard-wired instead of RF. What would I need to add the same sort of extra (non-LAN) RJ45 to emonHP?

Halsteads · 2022-09-27T09:08:08.673Z

Thanks Brian, I wasn’t aware of those options but after a bit of Googling looks v interesting.

But first, I’d like to explore capability of emonHP before getting into a parallel system. Still learning here. Best, David

borpin · 2022-09-27T09:15:04.066Z

Halsteads:

BTW the tank and probes are ~10m from emonHP. Hence thinking hard-wired instead of RF.

You can do the same as I suggested above, but just connect direct to the Pi.

I’d hard wire to the Pi (add the resistor there) to just outside the EmonHP and then fit a small connector at that point. I do this for any device I put together - you always want to unplug it for some reason!

You can then run a single wire to a breakout box of some form and then connect the Sensors to that.

OEM sell some RJ45 wired sensors - I usually buy sensors and connectors from Aliexpress and make them up myself as it is much cheaper, but I do have the pins and crimping tool etc.

Halsteads · 2022-10-10T06:16:16.885Z

Thanks Brian, Glyn,
Works perfectly.
Best, David

jacko · 2024-02-01T18:03:01.508Z

I have replicated the emonHP setup that a friends has, including an emonTH. Somehow the temp data from his emonTH is getting into his emonHP feed instance and showing up on his graph, despite the warnings above. I can’t replicate this on my installation.

image899×497 79 KB

Yes, we have verified that it’s a true temperature reading!

Any ideas how this is happening and how I can replicate? I would really like to make use of the emonTH now that I have it.

glyn.hudson · 2024-02-03T00:07:50.433Z

Do you have the emonTH feed data in your Emoncms account? If so, it’s just a case of selecting the indoor temperature feed in MyHeatPump app config.

To be able to receive data from emonTH you need an RF receiver, either:

Shop | OpenEnergyMonitor

RFM69SPI 433Mhz Transceiver

Open-source hardware tools for energy monitoring and visualisation

Price: GBP 22.26

or

Shop | OpenEnergyMonitor

JeeLink RFM69CW to USB Transceiver 433Mhz

Open-source hardware tools for energy monitoring and visualisation

Price: GBP 33.34

jacko · 2024-02-06T12:33:21.911Z

Do you have the emonTH feed data in your Emoncms account? If so, it’s just a case of selecting the indoor temperature feed in MyHeatPump app config.

The emonTH feed is not in my local emon configuration.

To be able to receive data from emonTH you need an RF receiver.

I guess I’ll have to get one. But it doesn’t explain my friends set up as he doesn’t seem to have either, unless he has the SPI module (but I don’t think this fits in the emonHP case). I’ll get him to look.

glyn.hudson · 2024-02-06T12:56:58.603Z

jacko:

I guess I’ll have to get one. But it doesn’t explain my friends set up as he doesn’t seem to have either, unless he has the SPI module (but I don’t think this fits in the emonHP case). I’ll get him to look.

Correct, I’ve just checked your original order and your emonHP is not equipped with an RF receiver since there were no RF sensors included in your original order. Please contact us once your JeeLink is connected and we’ll setup the datalogging. RF modules are only included if an emonTH was included in the original order.

ajdunlop · 2024-02-06T13:57:52.969Z

Because I’m also looking into the possibility of EmonTH sensors connecting to a EmonHP, @glyn.hudson can you confirm it is the RFM69SPI won’t fit within the enclosure but I could get a JeeLink dongle and this would allow me to receive from EmonTH?

How hard is it to set up the dongle, pair the sensors and get their data as inputs on my local EmonCms?

glyn.hudson · 2024-02-06T14:56:41.327Z

ajdunlop:

can you confirm it is the RFM69SPI won’t fit within the enclosure

Yes, it will fit fine. We just recommend JeeLink since it’s easier to retrofit. Both require setup, we can do this for you.

FarnhamPete · 2024-03-11T17:15:31.294Z

Is it possible to use a temperature sensor being used in Home assistant to report ‘room temperature’ to emonHP via emoncms? I’m new to this and my new emonHP is working fine but I’d like to add room temperature reporting.
I have looked at the emoncms ↔ HA integration instructions (editing config yaml file but haven’t succeded to get this to work yet). It’s probably me. I would love a youtube example video. Or more easily understood description that the H.E. examples.
Any guidance would be much appreciated.

Robert.Wall · 2024-03-11T17:28:32.854Z

Connecting a DHW cylinder temperature probe to emonHP Hardware

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?

billt · 2024-03-12T14:59:03.854Z

Is it possible to use a temperature sensor being used in Home assistant to report ‘room temperature’ to emonHP via emoncms? I’m new to this and my new emonHP is working fine but I’d like to add room temperature reporting.

Yes, it’s possible. This is a snippet of my configuration.

emoncms_history:
  api_key: 9xxx52f8cd702d2d4fxxxxxxxxxxxxxx
  url: http://192.168.0.14/emoncms
  inputnode: 22
  scan_interval: 30
  whitelist:
    -  sensor.bathroom_temp_xiaomi_temperature
    -  sensor.bed2_temp_aqara_temperature
    -  sensor.conservatory_temp_temperature
    -  sensor.dressing_room_temp_temperature
    -  sensor.en_suite_temp_xiaomi_temperature
    -  sensor.entrance_hall_temp_temperature
    -  sensor.fountain_ds18s20_1_temperature
    -  sensor.fountain_ds18s20_2_temperature
    -  sensor.gw2000a_outdoor_temperature
    -  sensor.hall_temp_xiaomi_temperature
    -  sensor.lr_temp_sonoff_temperature

Put in your read/write api key (found at the ‘input API help’ link on the emoncms input page.

Change the url address to that of your emonhp, choose the input node to suit you and the scan_interval to suit. Put your sensor names in the whitelist.

It’s YAML so the indentation is important, it won’t work if the indentation is wrong.

FarnhamPete · 2024-03-12T17:43:41.000Z

Many thanks for that. I’ll give it a go. I’m learning YAML as I go and needs arise.
Peter J.

wittmannf · 2024-07-19T02:23:05.841Z

billt:

xiaomi_temperature

hey @billt , I’m new to temperature sensing. Would you mind sharing references and which sensors you are using? I liked your setup. Are you using temperature sensors from Xiaomi? How do they connect to the server (like Wifi or Zigbee or anything else)? I’m looking for an easy way to add multiple temperature sensors and track them in a single server (EmonPi in my case). Thanks!

glyn.hudson · 2024-07-22T13:17:19.095Z

If you have an emonPi you can easily connect DS18B20 temperature sensors directly to the unit, see: https://docs.openenergymonitor.org/emonpi2/other_sensors.html#temperature-sensing

Shop | OpenEnergyMonitor

Encapsulated DS18B20 temperature sensor

Open-source hardware tools for energy monitoring and visualisation

Price: GBP 5.88