Raspberry π

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  • She actually used these seeedstudio.com/Seeeduino-LoRaWAN-W-GPS-­p-2781.html . There is no wifi, but a GPS and a Lorawan. They are nodes on the lorawan network.

  • Yes, WiFi, oled display and lora onboard. For the purposes of my test, the remote transmitting node has WiFi and oled disabled and wakes from deep sleep every fifteen minutes to send a reading to another Dev board which I have coded to act as a simple gateway. Ie just pushes the contents of received packets straight to thingspeak. Just tested it out to 2km with only quarter wave wire antennas.

    Wired is not an option as transmission range is in the kilometers and across terrain that cannot be cabled (crevasses, avalanches etc)

  • Has anyone played with the Google AIY Voice bits? I have one of the original V1 sets, that I've built up on a Pi 3b+ (but could swap to a 3 I think) that is running my weather station (via PYWWS)

    This means it's running on Rasbian, which the bit's I've found suggest the AIY stuff doesn't like...

  • Wired is not an option as transmission range is in the kilometers and across terrain that cannot be cabled (crevasses, avalanches etc)

    Yeah, I wasn't thinking of your situation specifically, I was just wondering why someone would produce a lora/wifi module, because either you have a sensor (in which case, why would you have wifi) or you'd have a gateway, in which case you can probably move it a few meters over to where the wired connections are.

    Unless there's another use-case I'm overlooking?

  • Ordered 10 x DS18B20 from China (due in a month or so by slow post) but cheap (under £5 inc P&P).

    Also ordered three DHT22's to check how accurate they are for temp/humidity monitoring.

    Plan is to have a DHT22 in each room (2 bedrooms, study, lounge, hall, kitchen, toilet, bathroom, communal hall, outside) and a DS18B20 ziptied to a radiator pipe in each room to monitor heating.

    Also looking for a 1-wire barometric pressure sensor, CO2 sensors for the bedrooms and a CO sensor for the kitchen.

    50m reel of alarm cable (and I can use the existing alarm cable in the flat to get to some of the rooms already) to bring it all back to a Raspberry Pi to do the data capture and logging.

    Will also look to get a photodiode sensor on the electricity meter blinkenlight (which apparently blinks as every thousandth of a unit is used). Wonder if gas meter does the same...?

    All for shits and giggles with total spend probably under £50 if I can keep it that way.

  • Will also look to get a photodiode sensor on the electricity meter blinkenlight (which apparently blinks as every thousandth of a unit is used). Wonder if gas meter does the same...?

    Coooool

  • Will you need pull up resistors to get the DS18B20 working reliably with the pi?

    Also, why not do it wirelessly? You can get a decent WiFi Dev board for less than a fiver now days. I know that's another £50 down but surely worth it for no cables?

  • I always wire them like this and that works a treat. I believe you can power OneWire devices off of the data line, but I never really got it to work and it wasn't worth the hassle for me.

  • Yes, pull up resistors required.

    I've already got 4-core alarm cable running to most rooms.

    I also don't want a whole bunch of wifi devices to have to manage.

  • I've got plenty of most values if you would like me to post you some.

  • Mine came like this, very neat if you've got the skills to solder those tiny resistors (I don't)


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    • IMG_20191027_202119.jpg
  • Project central heating is back on....

  • Same, but wondered if any pin on rpi had built in pull-ups

  • Finally managed to get enough time to myself to set up the pi-hole.

    Seems to work.

    The OLED from AliExpress seems to be doing its job.

    It probably sounds stupid, but I'm still surprised by the size. If I'm honest, the OLED is so small I'm not sure how much use it'll be. If I'd thought about it the 128x64 may have been more sensible. The 2nd pic is from standing - just to convey the legibility.

    ... wondering if I can get it to display my DNS to make entering into other devices easier.


    2 Attachments

    • IMG_20191029_214457313.jpg
    • IMG_20191029_220550971.jpg
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Raspberry π

Posted by Avatar for photoben @photoben

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