Bathroom controller. It consist of a relaybox with a HLK 5v power source, it's hidden in the closet. Then I have realy to light, nightlight, mirrorheat, and extraction fan
And then the controller it self it's a Wemos D1 Mini Pro, Si7021 Temp/Hum, sensor and a PIR HC-SR501
3D file is created with Freecad, STL files are available here:
https://www.thingiverse.com/thing:2890456
Maybe a bit off-topic, but I use octoprint as server for my 3d printer, and use Domoticz as homeautomation server. I want to know when 3D print is done, so I created a node-red flow that connects this via MQTT, so domotics shows print progress...
https://www.domoticz.com/forum/viewtopic.php?f=21&t=14021&p=162935#p162935
when compiling in Arduino IDEdo you remember to select correct Arduino board, Pro Mini and choose 3.3v 8MHz.
Tools->Board->"Arduino Pro or Pro Mini"
Tools->Board->Processor->3,3V 8MHz
Maybe if you forget this you will compile with wrong oscillator frequency and get wrong timings to your communication to DS18B20
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 
Finally got my LoRaWAN RAk831 with RPI gateway online
@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?
I copied ToniA's approach to get 5V from the Heatpump, and soldered wires to the IR detection circuit:
@sundberg84
Can I assume that you are using power to DHT22 via a FET or directly from Arduino pin, so you are controlling when the DHT22 is getting power/voltage?
I personally think using a DHT22 that requires min 3.3 V is not a good option for battery device - but I understand it can be managed 
http://www.datasheetcafe.com/dht22-datasheet-pdf/
DHT22:
My opinion is is use HTU21D instead since it can operate on a much lower battery voltage. Watch out, some breakout boards have a 3,3V voltage regulator, that is just using battery consumption and isn't needed when using Arduino 3.3V 1Mhz battery operated
@tboha @mfalkvidd
Thank you guys for this OFF-topic question in this thread... Now my Arduino Pro Mini's are back alive again
I used this code http://forum.arduino.cc/index.php?topic=213053.msg1564631#msg1564631 uploaded into Arduino Duomilanove, used pin9 to touch the ATmega328P in Crystal clkpin1 - and success
On-topic you get first 2 beers on Saturday
@hek said:
@vikasjee
We were thinking of releasing 2.0 when we were having the MySensors meetup/BBQ at my house 9th of July.
So using the term "release-party" is also valid here
Why?
the chip isn't cheap -and as I remember you MUST be a participating member of the Z-wave alliance were minimum fee us US$ 3000 per year
Hi I was thinking if we should meet in Malmö (Sweden) for a 1 day afternoon BBQ and nerdy discussion about MySensor stuff?
I can invite for using our garden and the grill
@mfalkvidd Thanks for the link to the post, I think I should upgrade and use aluminium foil as you done to make a GND shield around the PIR sensor
You can also measure the pressure, how much pressure to creating air bubbles
Below is written by Benoit Drooghaag (just to ensure I provide credit to the author)
http://playground.arduino.cc/Main/Waterlevel
@gohan
Thank you, this will be my approach, then the sketch is the door/windows sensor
Thank you all for input.
I will post pics when project is ready
@sundberg84
Redundancy, maybe you should get a second temp/humidity measurement device, just in case your current beer cooler temp node breaks down...
What a nice design you have created
@dbemowsk
hi did you check the link I supplied? I rather discuss the topic in domoticz forum, as it could benefit other Domoticz/octoprint userrs
https://www.domoticz.com/forum/viewtopic.php?f=21&t=14021&p=162935#p162935
but I have installed on the octoprint the mqtt plugin, as my domoticz is also running both mosquitto and node-red, I specify the ip adress for domoticz in setup the broker in octoprint plugin mqtt,
I agree to Sundberg84
I'm a happy user, Domotics have a large community and most what you need, someone already have spend some time with it, to make it work one way or another...