General Discussion

@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!).

I have been buying all the parts I need on amazon, though it takes around 2 weeks to arrive.

@mrhutchinsonmn a single rs485 connection can use the MySensors protocol, just as a single nrf24 can.

@alf none of the smaller sensor will do actual pm10. The intergration time would be way to long to actually measure actual pm10 sizes reliable. They all calculate it from the measured pm2.5 values.

I'm planning to use this: https://smile.amazon.com/Chapin-10027-48-Ounce-Industrial-Acetone/dp/B00C4NQSQ6/ref=cm_cr_arp_d_product_top?ie=UTF8 or this: https://smile.amazon.com/gp/product/B07ZZGWJ61/ref=ox_sc_saved_title_1?smid=ACTB8CBED46SR&psc=1 for rising with acetone I plan on using this: https://smile.amazon.com/gp/product/B08B3C2PM3/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 or this: https://smile.amazon.com/gp/product/B005Z4RGQW/ref=ox_sc_saved_title_2?smid=A29JIFH4ZXPNL8&psc=1 for rinsing with IPA. I'm sharing the info because it's not always easy to find spray bottles with the right kind of chemical resistance. From what I've read, the usual advice for mechanical sprayers is to empty the container immediately after use because even with Viton seals and gaskets, very often "resistant" does not equate to "unaffected." For instance, LDPE ziplock bags may be able to withstand acetone for a while, but eventually the acetone will break through. Likewise, I used to think that nitrile gloves were fairly resistant to most chemicals, but then I noticed that acetone passed through them quite quickly. Likewise, nitrile gloves would be a poor choice for handling methyl alcohol. According to this handy chart, the best type of glove for both acetone and methyl alcohol (as well as IPA) are butyl gloves: https://www.augusta.edu/services/ehs/chemsafe/PDF files/gloveselechart.pdf As it happens, I picked up a pair just recently as PPE for use with, before, or after an ultrasonic PCB cleaning. However, last week I visited one of the big box hardware stores and their entire inventory of chemical resistant gloves was wiped out, so be sure to plan ahead.

As promised, what I found so far: the following dockerfile yeilds a usable cross-compile environment, provided you use it with a Makefile. FROM ubuntu:xenial RUN apt-get update \ && apt-get install --yes \ vim \ build-essential \ git RUN git clone https://github.com/raspberrypi/tools RUN git clone https://gist.github.com/3873805.git /build WORKDIR "/build" CMD ["/usr/bin/make", "CC=/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-gcc" , "HelloWorld"] # Seems I need a real makefile for the above to work. For cross compiling mysensors to work, hoever, you also need to properly seed the variable in configure, for it to work correctly. This is where I left off. Sources: https://stackoverflow.com/questions/18007326/how-to-change-default-values-of-variables-like-cc-in-makefile https://bitbucket.org/mitchallen/pi-hello-cross-compile/src/master/ https://desertbot.io/blog/how-to-cross-compile-for-raspberry-pi https://github.com/mitchallen/pi-cross-compile/blob/master/Dockerfile https://github.com/mysensors/MySensors/blob/development/configure https://github.com/raspberrypi/tools/tree/master/arm-bcm2708/arm-bcm2708-linux-gnueabi/bin https://www.raspberrypi.org/documentation/linux/kernel/building.md https://www.mysensors.org/build/raspberry

@172pilot said in Good thing mysensors has non-repeatable encryption....: @NeverDie Is a signing chip really necessary? If the packets are truly encrypted, and the hack you're trying to foil is a simple replay attack, I would think that including a simple incrementing counter into the message would do it. All the receiver would have to do is to only accept decrypted messages with a counter number GREATER than the last one it received. This should be simple to do if the encryption/decryption is already considered relatively secure? I think the answer is probably yes. Today. At this moment. At least for me and probably you. I mean, one could reasonably ask: why bother with having better security than my garage door opener? But as cracker tools become more prevalent, who knows what's coming next? It's not just us against juveniles and thugs, it's us against whatever weapons juveniles or thugs can download or buy ready-to-use from kickstarter (or aliexpress for cheap soon thereafter).

That worked for me. Thank you!