I wouldn’t say it’s particularly weird, plenty of other posts on here report that theirs also work without problem. It’s likely I just received a defective unit, sadly quite common with cheap chinese boards. I ended up grabbing a FP2 in the end as I needed the better range and zone detection, it’s not perfect either but it’s okay.
Do you plan to add sensors to HA via BT? Note that BT can only connect to one device at a time, so if you see it (and connect to) with app then it’s connected to app and HA won’t see it until you restart sensor (and you don’t connect again with app). And vice versa: when sensor is connected to HA you won’t be able to connect with app until you restart senor again.
Note also that bt range of these sensors is veeery limited…expect frequent drop-outs.
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i hope all sensors will work by esp bthome , but that is not reality.Yes minimum one time a day sensor lost connection with HA.I ordered linptech and tuya sensors for testing.
I think that you’ll get better reliability if you connect them via esphome
Ha detect only one sensor from four which I buy .I can’t see them in bthome ,this one I see in Ld2410 ble integration.
I have managed to get B&C to connect to HA over ble but connection is unstable. Initially, connection drops then reconnects every few seconds until connection becomes permanently unavailable. After this the only way I have managed to reconnect is after a reboot of the HA host device (Synology NAS).
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I use these cheap plastic cases from Ali: https://nl.aliexpress.com/item/1005004528893277.html
It fits well and sensors are working good.
Hi, so my ld2410 aren’t working.
There’s this part of the pcb that seems to be damaged. Any idea what that is?
I know I could just buy a new one but maybe I could still fix it by replacing the damaged component
This is inductor. If there’s only a bit of ferrite material damaged it should still be ok, as long as wire is ok. But this would be visible only under a microscope, or if you manage to measure it’s pins - resistance should be fairly small (i guess under 1 ohm).
By “it doesn’t work” - do you mean it’s totally dead? Does it draw any current when connected (to 5V)? It should draw somewhere between 50-100mA roughly.
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Thanks, so it should be under 1 ohm. If i need to confirm it, could I still measure with multimeter from another working ld2410 or does it need to be desoldered first?
Ld2410b doesn’t work, when wired to wemos it doesn’t even boot. Only when I disconnect it boots normaly
As for ld2410c it does work sometimes.
You can measure it without desoldering, just find some tiny wires so you’ll be able to get to connections. Under 1 ohm… well, can’t tell exactly, but even if it’s slightly above, but certainly not more, like hundreds or even in kohm range.
If you connect it through wemos make sure that power is powerfull enough, perhaps voltage drops too much.
Btw which size should I get? There’s a few available out there but I’m worried of getting the wrong size
Which size of … what? Power supply? Anything which has 5V output and, I’d say at least 1A (more doesn’t hurt, it just costs more and it’s bigger). If wemos is esp32 then chip itself can be quite hungry, then you add LD (which is also hungry) … then there’s board itself. Many of them indeed has 5V pin available, but traces from usb connector to that pin are questionable - sometimes they are too thin, so voltage drop is (too) big. I suggest that you power sensor directly on 5V source, not via wemos board and see if it works that way.
Oh, inductor… well, first you must know it’s inductance. By measuring resistance (ohms) as i suggested i only meant to see if it’s ok or not - if wire is broken. If it’s not ok, then you must measure it’s inductance from a good one and buy appropriate inductor. Regarding this - measuring while on pcb can result in wrong readings, depends how it’s connected to other stuff… But desoldering a good one will probably destroy it, so… sadly inductor is so small that it doesn’t have any value info printed on it.
In any case it’s darn small, so soldering such small smd’s requires a bit of experience.