Hardware

@zboblamont I think the safety point is highly debatable these days. I can see why the isolators were installed in the 60s, but with modern bathroom fans, this is an obsolete. As I pointed out, it is not required to be installed by the Building Regulations (at least in the UK). Anyway, back to the topic, I'll have to check but I am sure the relay has to be placed behind the isolator socket box. The isolator itself will be buried behind a shelving unit

@benhub Short answers, No, Yes, Yes The regulator will use power if connected. If your circuit is power hungry then removing the regulator will have limited effect. The sparkfun schematic on the article that you listed notes to disconnect the regulator for low power, so the advice is consistent. Unless you are using the genuine sparkfun versions of the pro-mini where the jumper can be cut then physically removing the regulator is recommended. [image: 1542936368860-arduino-pro-mini-v14-regulator-part-resized.png]

I changed all my radios to rfm68 exactly because poor range.probably you are on middle of a 2.4ghz signal war. Take a look on your wifi neighborhood.probably there's a lot of 2.4 signal already ,masking you small nrf24 signal.... And then all ebay ones are fake... Just make a try with 2 rfm69w and you never touch an nrf24 again. 😎

Recheck all your Nano connections. I think you still have the pin numbers and names mixed up. You will see almost all designs reference the pin name, because that ties back to the function in the microprocessor. Your IRQ should be D2 for example. Grab a Nano pinout from the web. You want to align the CSN, MOSI, MISO, SCK, to the corresponding digital pins for the Nano. You will also see pins with functions INT 0 and INT 1 Your IRQ has to go to one of those. Look at the MySensors "How to wire the radio" page. It has the pins that are most normally used. Welcome to the club. You can do some pretty amazing boards in KiCAD once you get the hang of it. PS. If you are in the US, check out oshpark for some prototypes. 3 boards for $9 if they meet the size requirements, and they are faster than delivery from China.

@alowhum Thanks

@alexsh1 said in Another nrf24l01+ fake or..?: Do you know if this is repairable? Changing resonator, chip or both? When power usage increases over time it would be interesting to know what is causing it...

@just4-electronics In also using the setup(am612) from NeverDie, and I'm pretty pleased with it. I mapped an extra cap to the setup but that's just for my pease of mind. 😀

@mickecarlsson I believe BME280.writeMode(smSleep); is not necessary. Forced mode must be used. I think after taking the measurement the sensor goes back to sleep. BME280.writeMode(smForced);

It could also be the article is not very new and lately battery technology allows for a bit higher standby voltage... who knows :D I don't think 0.1/0.2V would make a huge difference in UPS runtime while on battery

Another difference is digital bowl vs analog. Analog is more sensitive and less susceptible to respond to other things (like volatile organic compounds). The downside is that it has will only work for a few years, since it has some material inside that slowly reacts.

The 300kg might be a challenge. It seems most ali express load cells are aimed at light weights, or weighing humans. Here are some for lighter weights: https://www.aliexpress.com/item/1kg-5kg-10kg-small-range-weighing-pressure-sensor-load-cell-set-weight-sensor-set-sensor-HX711AD/32765498523.html Here is one for 200kg: https://www.aliexpress.com/item/New-Arrival-1PCX-200kg-electronic-platform-scale-load-cell-pressure-balanced-cantilever-load-weight-sensor-New/32703877639.html If you can't find one that does 300kg, you could use a lever mechanism to scale the force appropriately. I also saw some adds for custom load cells, but that is more expensive.

Great work @johang, thanks for reporting back.

thanks Yveaux That seems like the way I will have to go. I will work on it.

@bocmau that's very strange. Which controller are you using?

@hard-shovel That would be the cold coffee with cream with a certain Guinness ais quoi? ;)

@neverdie @neverdie I never tried to get OTA to work, no. Glad to see you diving in though!