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forum.mysensors.org

forum.mysensors.org

NodeBB forum in English. 12 sections tracked: My Project, Announcements, Development, Domoticz, OpenHAB, Vera, PiDome, Controllers, OpenHardware.io, Hardware, KiCad and NodeManager.

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Radiation Patter for NRF24L01?

Found some info (link below) while sniffing around - looks to be relevant ( pages 10-13 ) as it discusses the same MIF antenna design used on the NRF24 boards and the frequency is 2.4 GHz. Interesting read for newbies like me. My interpretation of the data is that the best gain/sensitivity is in/from the direction that the leg at the end of the squiggle is pointing. Might do some open air testing when the rain stope and I work out how to extract received signal level info :| https://www.infineon.com/assets/row/public/documents/cross-divisions/42/infineon-an91445-antenna-design-and-rf-layout-guidelines-applicationnotes-en.pdf?fileId=8ac78c8c7cdc391c017d073e054f6227&utm_source=cypress&utm_medium=referral&utm_campaign=202110_globe_en_all_integration-files&redirId=File_1_3_1152

Shower Monitor

@mfalkvidd After giving this some thought, wouldn't that imply that at sufficiently low flow rates, the the meter would not detect any flow. A leaky faucet? While I'm pretty sure that my pump can't pump that slow, the pressure would drop, eventually triggering the pump to start. A leak could be detected by periods of pumping that are very short? An experiment could be run to see how much water must be released to trigger the pump to start. The time between pumpings could then be used to determine this flow rate. And after reading this, I see I have to much time on my hands which could be used to address more pressing issues.

Outdoor Motion Sensor - Surprisingly Good

Hi, The sensor has a lux setting you can adjust to block triggering during daylight, but I just add an "after sunset" condition to my automation script to prevent daylight triggering. [image: 1778010220665-pir-settings.png] On AliExpress: PIR no base PIR with base

DIY an RF power meter Based on STM32F103 + MAX4003

As we all know, the nRF24 works pretty well, but there is a lot of device-to-device variation. This would be a nice thing to have when debugging the network. @juliefen will you be creating a github project with schematic, board layout, code, construction tips, theory of operation, calibration and operating manual, examples, etc.?

How to Choose the Right NEMA 17 Motor for an Electric Focuser?

Around 30–50 N·cm holding torque is typically sufficient for most focusers, and a standard NEMA 17 with microstepping (e.g., 1/16 or higher) usually provides enough resolution without needing a gearbox, though 0.9° motors offer slightly finer native precision than 1.8°. To reduce vibration and resonance, use lower current, acceleration ramps, and a flexible coupler, and for long sessions set the current just high enough to avoid missed steps while lowering holding current to manage heat.

cppcheck old-style c cast

Hi. I'm running cppcheck 2.18.3 Just grabbed the latest. The above were from MyCryptoGeneric.cpp. Perhaps some new checks were added since 2.1

Time to move to ESPHome?

I have learned the hard way, many times, "If it's not broken, don't fix it". MySensors fills a niche, very low power, very low cost, sensors (albeit, DIY). The range is about the same as Bluetooth. The data is usually a boolean or an integer. So let us not say, abanddoned but at a development plateau. A mature technology that still has legs.

Drive household SSR with SSR and Arduino

Quick update: i wanted to hide and protect the Nano in a housing. Aliexpress supplies very nice enclosures that fits on Din rails. https://fr.aliexpress.com/item/1005005505247992.html They fit in electrical cabinets thanks to standard dimensions. [image: 1771086807073-a.png] [image: 1771086818359-b.png] One 3Dprinted part later (glued inside enclosure) and the Arduino is safely held in place! [image: 1771086835896-c.png] [image: 1771086853317-d.png] [image: 1771086860801-5.png] stl file of adapter : dinRailEnclosureMountForNano-revE.stl

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