General Discussion

@skywatch better safe than sorry :) I can imagine this question being ask completely seriously.

@skywatch hah, tell me about it. it went through battery and all. Still dutifully reporting every 3 minutes.

I use these: https://www.aliexpress.com/item/32855681042.html Well, they work, but profile is not the best for dupont (2.5mm). But for their price it's ok.

Dear MaxG. Thank you for your interest. «I am missing units of measure in the graphs» - You are right. I didn't put the units of measurement in the graphs. I described the graphs in the beginning of every paragraph. «Why is there a significant dip at 50?» - every sensor has its own transient response. Some pyroelectric detectors are faster, some not. Serial opposed dual pyroelectric detectors have transient responses longer than parallel. I found value 50s to be approximately good for all of the samples. Also, this value is comparable with the scale of percentage, so 100s, or 100%, is the length of the full period, and 50s, or 50%, if that of one of the two transient responses, heating or cooling respectively. [image: 1609243119568-663cf0d1-3c9d-422e-ab86-709dfef91a05-image.png] «Maybe overlaying the sensors in one graph per category would allow for a quick comparison of the response.» - every graph includes four lines. If I overlay all of them one another, I'm afraid, we will receive chaos. I think It would be a good idea to overlay the approximations only. What are you thinking? «A summary/conclusion would also be helpful to the reader.» - You are right twice. But I didn“t do it for the next reasons. This method is too young, the first attempt. I don't have enough knowledge, skills or practical experience do write conclusion. When a half of the year have passed by, I will, probably, be able to write good, professional conclusions. As the author, I am also interested in the opinion/conclusions of the other people. This is why I have posted it here. If you have more questions, please, feel free to ask. If you know the other people interesting in pyroelectric measurements, invite them to this discussion. This topic is brand new. I am looking for more feedbacks and opinions. I'll be glad to receive positive, but also accept critics. The truth is born in discussions. Kind regards in return. P.S. you can even think about carrying out the same measurements all by yourself. If you find a way how to test motion sensors to avoid false alarms, you will be able to earn something.

No, I define the number of pulses for 1m3. This data is theoretical and to be verified. Adjusted to 300,000 pulses per m3 or 6,000 pulses per 20 liters, I obtain an actual volume of 15 liters. So I had for 6000 pulses a volume of 15 liters. So if I had waited to have one m3, I would have had 1000 liters / 15 liters = 66.67 * 6000 pulses = 400,000 pulses per m3. For your second sentence I agree and that is the problem.

@mfalkvidd If the message was sent by a cat, maybe...... ;)

My lab partners think we should use the center of the 1st gaussian as the real peak, because the presence of the second peak influences the position of the first within the data as in, we aren't talking about the fitted-function, we are talking about the data points themselves.

@skywatch tak og i lige måde 👍

@NeverDie I clean my solar lights with: Cloth (2 pcs) Sponge Dish soap (a few drops) Regular 3% hydrogen peroxide (1 gallon) Oxy laundry booster (1/4 teaspoon) Bowl of water Another bowl for the peroxide or the same bowl without the water Rubber gloves (1 pair) UV light or sunlight Paper towels Plastic wrap (optional) Tape (optional) Like other lamp owners, I don't clean them as often, but at least twice a year. I want my solar lights to be perfect every time I use them.

@Motorhomer I’m none pert but I think replacing the resistor will work. You’ll just need to adjust the values, either manually or by following the calibration calculations in the INA219 library. You’ll be limited to 75/350= about 20% of the resolution, but depending on your use case that might not be a problem. If it is, maybe you can get a 5x smaller resistor?

@KevinT every time, yes. I don't know the relation to processing.

@Daniel-RUIZ9 I may have found a solution to my problem, I have to test a few days to be sure. Hard my domoticz installation I have two raspberry one in server the second in client. The raspberry server is connected to the USB gateway and on the second I have configured the ethernet gateway. I keep you informed if I still have crashes.

@johnnyfp yes the not yet released master branch supports multiple transports. See https://forum.mysensors.org/post/105364

I have MySensors node with 5 moisture sensors - work without problems for one year. Node platform: Arduino Pro Mini 5 V RFM69HCW powered by 3,3V voltage regulator + resistors on communication lines 5x FDRobot moisture sensors 3x DS18B20 temperature sensors powered by 5V, 1A power supply

There are a bunch of non-contact voltage detector videos on youtube: https://www.youtube.com/watch?v=R-ilEx2zc9I Most are of a 3 transistor design, which from this video looks like it would be good enough for your purpose. If you wanted something even more sensitive (or greater range), you could use op-amps instead.

Hi @mrhutchinsonmn, Yes, it is possible to contribute your own tutorial by creating a project on openhardware.io (it shares the same database as mysensors.org) and submit it for review. After publishing, I can "move" it to the mysensors.org site and you can continue editing it. For long time contributors we can offer full editor rights which means you can update any article on the site. It's a bit scary to hand out this right to anyone so you'd have to prove yourself first ;) If something is wrong in the current articles, you can of cause pm us the error to be corrected.

answered here : https://forum.mysensors.org/topic/11404/rfm69hcw-beginning-of-a-newbie-with-atmega328p

Funnily enough I saw an ad for water detecting bed protectors for incontinent people at the hospital just yesterday. They seem to run a material like aluminium foil under the sheet in a pattern. Maybe worth looing into as these seem to fit the bill for what you need. The ones I saw fit to a system to alert a call centre via the phone if the person wets the bed. I didn't see the price though as no need for one (not yet anyway!).