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💬 NRF52 Wall-Node (AC/DC)

openhardware.io 6 Aug 2018, 13:49 last edited by openhardware.io 13 Jan 2020, 12:50

https://www.openhardware.io/view/613/NRF52-Wall-Node-ACDC
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Please Is it possible to buy only PCB? Do you plan also to release your sketch?
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13 Apr 2020, 14:05

@scalz May I request you to share your code for it please. Thanks
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Sorry, only saw your message now. If still needed, I do have a few boards left.
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Nice project manufacturers datasheets, RF appnotes etc all mention this, with results for different usecases (like gnd plane size etc). I mentioned it a few times on the forum: nothing under or near antenna (keep out zone) their matching circuit, and CE/FCC certif are based on their development boards+their antenna if external, often without enclosure. there are a very few pcb antennas which are resilient to untuning. ceramic or meandered pcb are usually more compact but less resilient (like when you approach your hand and device suddently has better or worst communication) once you change any of these parameters (board shape, gnd size, enclosure etc), it breaks FCC, and may need retuning, still you can get useable range. "ideally" tuning should be done once enclosed for example. manufacturers can't cover all cases. on my side, I try to follow these rules. and when interested in a design or a device, I check this. Mainly the routing+gnd, antenna choice, keepout zone, and orientation vs my usecase (long range needed or not for example)
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Project completed.
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Hello, Very interesting project ! When I try to put your gerber files in JLCPCB site, there is no view, and no dimensions ? Is it normal ? which dimensions is required ? Thanks
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@nca78 I don't use ATAES132A. I put it in just in case I wanted to invest some more time using it. I now just use SimpleEncryption, it's secure enough for my purpose atm. (since the area I live in uses KAKU a lot, an insecure 433MHz lightswitch, I don't think anyone would be bothered to hack my temperature sensors. I found 163 433Mhz devices when I left domoticz logging for a couple of days.)
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https://hackaday.io/project/178235-mini-thermometer-hygrometer-with-e-paper-on-nrf5

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