Hardware

The atmega32u4 / pro micro is not very commonly used. https://forum.mysensors.org/topic/1790/pro-micro-hookup-and-code has some information, but it doesn't look very easy.

Thanks, I guess what i am trying to find out is how i get my sensors code to use the Adafruit_PWMServoDriver code to do the same as you than. I would like to control 5 sets of RGB strips by 5 separate V_RGB faders in domoticz using my sensors. But i cant figure out how to get mysensors to tell the PCA9685 chip how to controll the channels.

This ino is working for me, it has the sleep function to save batteries. The Adafruit en the github/mysensors-> https://github.com/schizobovine/VEML6075 lib gives far to high index with my sensor. Only uv a and uv b declaration is not correct. Uv expect a index 0 till 11, domoticz controller passes a lower figure when it receives a number above 11.

Hi, Working with tgs2602 , tgs 2620 and tgs2611 . I've read the replies from top to bottom but haven't understood how exactly i take data from the graph in datasheet and use it with power regression .

We offer to give technical support, but in return "one day" we will ask you to return the favor and bake some chips for us. :grin:

@neverdie said in A $6.61 "linux computer" that's about the size of an Arduino Pro Mini...: @nca78 At least in the past, the trouble I had with non-raspberry pi SBC's is that the linux software coverage for them was typically spotty/buggy. Has that improved at all, or is it still a big risk? Things have improved a lot the last few years, as long as you are careful in device selection. Don't become enamoured with hardware specs only. Some of these SBCs look great "on paper" but the software (driver) support is awful and they are stuck on some old kernel because the Chinese mfr. do not understand anything about what is Free Software and do not cooperate with the community in releasing documentation so we can write drivers, etc. Also look for good community support around the device in question. But typicaly this will be ~= the above (the more open the device, the more, better, and longer term support). If you do a little homework though, you will be alright. Some good resources to get started are Armbian (stick to their Supported Devices list, and you will have a good result), https://www.fsf.org/resources/hw/single-board-computers, and linux-sunxi, etc...

I've been busy the last day or so..:male-technologist: and I've now got the radios communicating! :) i've used the pin config given by adafruit: [image: 1572016412340-featherm0-rfm9x.png] https://learn.adafruit.com/adafruit-feather-m0-radio-with-lora-radio-module/pinouts i've read about timeouts for these lora boards, so i've upped the values in the both sketches. https://forum.mysensors.org/topic/8813/any-success-story-on-lora-rfm95-module-and-mysensors #define RFM95_RETRY_TIMEOUT_MS (5000ul) #define MY_TRANSPORT_STATE_TIMEOUT_MS (20*1000ul) #define MY_RFM95_TX_TIMEOUT_MS (10000ul) I spaced the radios about a 1m apart and they now communicate :) i'm not sure if distance helped. Also with the above timeouts they aren't needed at such a short distance.

You may want to check this out concerning the battery https://forum.allaboutcircuits.com/threads/real-time-clock-rtc-breakout-boards-warning.118173/

@blom Hi, if you want to run two gateway on the raspberry GPIO, it is possible but it requires some configuration steps. You can find some info here in the forum or you can see here how I have done it for the d-diot board (check basic system and MySensors pages). I have used an RFM69 radio module in combination with Nrf24, but it should work also for an rfm95, if the wiring is the same.

For the BME280, if you use the standard library and setup it uses "forced mode" with a 1sec sleep between samples. This uses very low power, a few mico amps.

@steven987 I would argue the perfect battery setup is a single AA or AAA LiFePO4. No boost or regulator needed, nominal voltage: 3.2v Much safer than traditional LiPo/Li-ion Really easy to solar charge with TP5000 module and cheap solar cells Cons they're not super available a little pricier require a LiFePO4 charger still potential for fire with enough abuse Significantly less power density than NiMH or alkaline LiFeP04 Batteries https://www.ebay.com/itm/12X-SOSHINE-LIFEPO4-AAA-10440-BATTERY-280MAH-3-2V-FOR-WIRELESS-MOUSE-ALARM-TOY/333294469931?hash=item4d99e6032b:g:lk0AAOSw04ddULoH TP5000 Charging Module (I use for solar charger) https://www.aliexpress.com/item/32807030878.html Solar Cells https://www.aliexpress.com/item/32882323830.html?spm=2114.12010612.8148356.16.192a59c23u0hej

@alowhum good point. Maybe not learning, but inference could be very useful.

Just home so opened the Node case and glad to confirm despite ageing my recollection was accurate. This screenshot is common to the PR6/7 using CH2P if it is a undirectional flow. [image: 1569503408884-ad764771-f9db-4636-8556-4dfe0c353137-image-resized.png] Looking at the circuit afresh I see no reason why the internal input pullup of IRQ should not work either through a drop resistor or possibly direct, since all it does is sink the signal, which the IRQ will pick up as Change/Falling/Low. From vague memory of the sketch, mine is triggered on LOW. 1 - Unlike Reed switches (my gas reed duration is ca 6 seconds) mosfets are fast, so the pulse duration is so short it will not register on your multimeter hence the perceived uninterrupted 5v. The PR7 spec you posted says 10ms duration... 2 - If envisaging a standalone radio node such as deployed here, you may be better going with a 3.3v PM to begin with rather than mess about with level converters later... Hope this helps...

@scalz Thanks for the link to the 3.3v USBASP mod! i have been pulling my hair out trying to get bare 328p chips programmed using a generic ASP thank you!!!

@maartend See for the link below. It's one of the first hits when searching on google with the words "BME680 raspberry pi": search terms link Reading a sensor on a raspberry pi 4B can't be much different from older raspberry versions I guess. The OS might have changed with the new version. Python hasn't.

@nagelc - correct, its possible to use without booster - but its harder depending on which sensor you use. If the sensors require minimum 3.3v it might be hard to do without booster, but there are several sensors managing down to 2v or so. The harder part of using EasyPCB without booster is that the BOD on atmega328 chip is normally set to 2.8v so when the battery goes below this the chip shuts down. So you have to edit the fuses and change BOD if you want to use it below 2.8v Everything mentioned here is described on openhardware.io - look for the section Battery without a step-up booster (advanced users)

@dk_iot MySensors is not BLE based. It uses a different proprietary rf mode. nagelc mentioned the previous nrf5 arduino core by sandeep, compatible with MySensors. But the new released arduino core you're talking, is based on mbed, it's not MySensors compatible (would need some work, afaik there is no plan for the moment).