I have at some point also been using a ping with sr-hc04, I dont have the actual code here, but as I remember, I ping until i get 3 results in a row which are identical. Instead of ping 3 times and make an average.

@markcame

Hi you should provide your heatpump info to Toni at the below link. check manufacturer + model + relevant data from your remote control and also your protocol info. then other persons using your heatpump can benefit from your work

https://github.com/ToniA/arduino-heatpumpir

PS. I am for my heatpump not using arduino/mysensors, as it was actually much easier to use/integrate Wemos D1 Pro mini + ESPEASy + P_115 heatpumpir into my Domoticz.
https://www.domoticz.com/wiki/AC_/_heatpumpIR#Check_heatpumpIR

@scalz said in Your workshop :

corexy

I think many guys envy your 2 lab:-)

I also vote for Wemos D1 Mini Pro
But I have no intention to use those for battery operation, As the other guys states, only option for low power battery operation is Arduino+ NRF24L01+
Actually a fairly little nice device:
https://www.wemos.cc/product/d1-mini-pro.html

@enlo
I would assume to drill a hole in the metal chimney that is between the wood boiler and the brick chimney.
then depending of the K-type thermocouple
then there is a nut so you can secure this like this:
https://www.aliexpress.com/item/Newest-High-Temperature-100-To-1250-Degree-Thermocouple-K-Type-100mm-Stainless-Steel-Probe-Sensors/32786956791.html?spm=2114.40010308.4.1.LxioyK

Or else you can sealed with special heat resistant seal:
https://www.amazon.co.uk/Heat-Resistant-Sealant-1250-300ml/dp/B0046450C4

Newest High Temperature 400 Degree Thermocouple K Type 100mm Stainless Steel Probe Sensors

$2.96

Heat Resistant Sealant 1250 C - 300ml

£5.08

6 available

@korttoma
Glad that you found the rootcause + published your analysis

@korttoma said in Monitoring a wood boiler heating system:

Finally got a MAX31865 + PT100 on a breadboard set up and measuring the smoke temperature.

But I seem to have an issue, either there is something wrong with the library I'm using or the sensor just cant handle the heat. If it gets hot enough I get negative values.

Could it be something that you store your read value in a too small variable, so that you get variable rollover?

Looks very cool

Thank you Flopp
Now my wife will be a happy wife - since I will upgrade my ceiling lamp to be dimmable and she will have a happy husband since I can remote control the lamp when she forgets to switch it off - I think this is a win-win situation

Did you try to this?
sudo nano /boot/config.txt
Add to the end:

enable_uart=1
sudo nano /boot/cmdline.txt
Remove everything and add this:
dwc_otg.lpm_enable=0 console=tty1 elevator=deadline net.ifnames=0 root=/dev/mmcblk0p2 rootfsty

Taken from here:
https://community.openhab.org/t/has-anyone-gotten-razberry-working-with-openhab-2/12539/11