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💬 Mini weather station with e-ink 2.9 Inch

openhardware.io 30 Oct 2020, 15:26 last edited by openhardware.io 27 May 2021, 21:25

https://www.openhardware.io/view/8233/Mini-weather-station-with-e-ink-29-Inch
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mysensor 24 nrf52 17 bme280 8 weather forecast 3
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topic:timeago_later,25 days

berkseo 24 Nov 2020, 22:23 last edited by berkseo 24 Nov 2020, 22:28

Added an extended version. +MAX44009 light sensor, AAA batteries
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topic:timeago_later,3 months

berkseo 25 Feb 2021, 20:42 last edited by

https://hackaday.io/project/177911-mini-weather-station-efekta-with-e-paper-display
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topic:timeago_later,3 months

berkseo 27 May 2021, 21:27 last edited by

updating the project to v 0.54
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topic:timeago_later,about a month

berkseo 8 Jul 2021, 11:36 last edited by

added support for E-Ink DES to the project. Further test in the refrigerator
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mysensor 24 nrf52 17 bme280 8 weather forecast 3

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Hi @koresh - I had a little accident on the AC side :-). I was wondering what values the 2 resistors (TH and SMD) and diode are ? Thanks!
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Could you please update the description with what component goes where on the pcb?
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@kimot in theory you might be right, but in practice... it just works. The propability of collisions is extremely low and this is, as far as I know, the only problem you can worry about. After all, it was not my idea to use MySensors with RS485: https://www.mysensors.org/build/rs485
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7 Feb 2017, 00:20

Yes. Correct. call BME.begin() every time and the subroutine only at the beginning. And you are also correct about the library. I use the "blue" lib, from Sparkfun. As i can recall correct (it's been over a year since I built the damn thing) I have tried both, and found the Sparkfun more stable. And you CAN switch off power for this module, but after conversion it goes to sleep and uses less than 1uA. Hardly worth the effort, because the current can find a way over the data lines, and that's a pain in the behind to solve (I tried!).
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Hi guys, I've made MySensors node based on that sketch, but I can't figure out, how to send V_VAR message from Home Assistant to set rollTime. Any ideas? I'm interested in UI number_input or something simmilar.
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13 Jan 2022, 18:32

Hi @chey, no, with the pro minis and MySensors lib I couldn't get less. Didn't measure with yet another multimeter though... My battery sensors are working now for about a year and the battery levels are between 65% and 70%. The sensor furthest from the gateway is at 65% and the 3 others at 70%. Not bad I think. https://forum.mysensors.org/topic/11499/checking-mechanical-locked-doors-by-a-battery-based-windows-door-sensor-node

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