439 24GHz Radar Presence Detector that Works (LD2410)

Detecting humans is one of the biggest challenges in Home Automation. Most of us use PIR sensors for that purpose. Unfortunately, they do not detect presence without movement and switch off. Who wants that the TV switches off when you quietly watch a video?
Recently, new radar sensors appeared that solve this problem. But they have a slow reaction when you enter the room. Some KZbinrs suggest combining such a sensor with a PIR. An expensive workaround.
My second channel: / hb9blawireless
Links:
LD2410 Sensor: s.click.aliexpress.com/e/_DnF...
LD2410 including base: s.click.aliexpress.com/e/_Dn2...
Aqara FP1 Sensor: s.click.aliexpress.com/e/_DFW...
Tuya sensor??: s.click.aliexpress.com/e/_DcH...
LD2410 Info: www.iclegend.com/en/product/l...
Sensor info: h.hlktech.com/Mobile/download...
FCCio Database: fccid.io/2AWE7
Home Assistant Radar project: community.home-assistant.io/t...
Tuya Sensor blog post: blakadder.com/cheapest-tuya-h...
Other 24GHz Sensor:
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[@hi-link4092]

Hi Andreas, really appreciate your time and dedication to do such video for our sensor module LD2410, you are so great. you know and explain this module better than our engineers.☺☺

[@AndreasSpiess]

Thank you! Now we would be interested what your engineers do to solve the issues I mentioned in the video ;-)

[@hi-link4092]

@@AndreasSpiess yes, we are testing here and update you the results.

[@enricobernardini557]

​@@AndreasSpiess I got an ld2410B (bluetooth) thanks to your video. Regards the issues you point to at kzbin.info/www/bejne/mnLdeYumhZh5mas minutes, it seems to me that the first event to switch from green state (output 0) must be a motion event. After that, the sensor needs a motion OR motionless trigger (before timeout expires) to keep the output pin HIGH. In my opinion it is a good behaviour: if someone entered in the room he/she can stay in the room :-) , the motionless triggers can be ignored otherwise (so you can set the thresold lower). What do you think about? Thank for your nerdcool channel :-D!

[@dan-nutu]

One quick question for the engineers: can 2 or more LD2410 sensors correctly operate in adjacent rooms or do they interfere with each other? Thanks

[@hi-link4092]

@@dan-nutu Hi Dan, the space between two modules is more than 1.5M and the antenna surface of the module cannot be placed directly,thanks.

[@atomikrobot300099]

Perfect! I’ve been meaning to replace my study’s, workshop’s and kitchen’s PIR sensors with mmWave presence detection. You can’t beat the value of these modules!

[@AndreasSpiess]

Good idea!

[@PhG1961]

Awesome product and a great video. Recently I bought a few radar sensors, but this model looks much more promising. I need to tinker with this !!!

[@AndreasSpiess]

And doing some tests is not too expensive...

[@PimentinhaPT]

Nicely done and you found a way to be on the sofa as part of the testing process, thats a win win scenario, keep up the good work

[@AndreasSpiess]

Definitively a win-win situation ;-)

[@Davvg]

Great video! Also, I really appreciate that you reply to so many comments!

[@AndreasSpiess]

Thank you! Yes, I try to answer all comments.

[@xDR1TeK]

Wow Andreas you're on a whole other plane of existence. Brilliant work.

[@AndreasSpiess]

Thank you!

[@JohnBaxendale]

As ever, you seem to create a video on something I've been looking at, it's as if you know! Awesome!

[@AndreasSpiess]

Glad I could help!

[@keen2461]

Hey Andreas....just wanted to say I want to be like you when I grow up (though you're only a few years older than myself😀). I really appreciate the time and dedication you put into these useful videos. May God keep you healthy and with such great spirit way beyond when we have quantum microcontrollers!! Cheers from Colombia.

[@AndreasSpiess]

Thank you for your nice words! Indeed, live can be rewarding also for old people like me. So there is hope ;-)

[@peter.stimpel]

I really like your no ads policy, support well deserved! Now I found my answer, maybe. We are in the middle of planning our new business building. During one of the meetings, the technical expert came up with the question how to switch on/off lights in restrooms. In our old building, you have to move from time to time while doing the "business". This results in the need to wave to the sensor when it takes longer, or you are sitting in the dark. The expert said there are sensors which do not need that waving action anymore, and I was asking myself how this works. Seems, your video delivers a possible answer.

[@AndreasSpiess]

This 24GHz technology probably became "ripe" over the last months. Last year, I saw some 60$ sensors in this frequency range and found it too expensive for general use. With the new price point it became interesting.

[@blakadders]

There's a glut of mmWave devices from Tuya and Aqara made their own so now a few manufacturers appeared online with their products like HLK, MicRadar and LeapMMW. There's a selection of specialised ones for sleep, heartbeat or fall detection as well as 60GHz models. Personally I'm waiting for the people counter from MicRadar

[@LoopOnTech]

Hi Andreas! This is a great video and very useful while designing a custom board for the LD2410. Thank you

[@AndreasSpiess]

Good luck with your board!

[@wrbrower]

Andreas, thank you for this. Ordered six with your link. After experimenting, I may ruggedize these for car backup sensors being the bumper cover.

[@AndreasSpiess]

Look at the datasheet where they show you which plastic cover is good and which one is not

[@a930913]

I have made an integration for Home Assistant for the LD2410B; the Bluetooth version. It should automatically pick up the sensor via Bluetooth and offer to adopt it. It will be released in version 2023.2. Thanks for bringing this sensor to my attention Andreas!

[@AndreasSpiess]

So I have to try it out. I also have the BLE version...

[@dartfrogdk]

i got the ld2410B i can pick it up using my phone but in homeassistant it say no unconfigured devices

[@michaellakeman4208]

Andreas - I admire your patience having read through the questions.

[@AndreasSpiess]

This is part of my fun!

[@efimovv]

Very promising sensors! I ordered 2 more expensive ones but not yet test them. But they already have kind of working ESPHome integration with settings.

[@AndreasSpiess]

Cool. Now you have to make them work ;-)

[@sahilkarni1550]

so wats the difference between those expensive once and this have you texted it yet ?

[@remy44444]

Amazing and very informative. When I encountered this problem I went with motion sensor + shock sensor ( on floor ) whenever someone existing the room and no motion determine after a minute the room is empty. Same goes with doors monitor for the shower. Btw, Alexa dot3 has microwave sensor, but it's unreliable and takes 30 minutes to turn off.

[@AndreasSpiess]

Interesting! So far nobody mentioned shock sensors for this purpose!

[@anonymoususer6448]

Solution for "PIR and sun" problem? Thank you Andreas for doing all the leg work again. We can stand on your shoulders one more time. Great research and great verifiable, information. From a true engineer ! Thank you Last winter I had installed PIR sensors around the house. They worked fine till this summer where the sun, or the movement of hot air, gave me a ton of false alerts. As you said: if it has not been tested.... I was going to experiment with Ultrasonic sensors, but now that I have seen your video, I may try the LD2410 first

[@AndreasSpiess]

So you are a happy person living in a warm country ;-)

[@anonymoususer6448]

@@AndreasSpiess not that far, just Belgium ;-)

[@luisgarrido2166]

Always great videos! Thank you very much.

[@AndreasSpiess]

You are welcome!

[@rickharold7884]

V cool. And lots of work digging around for info. Thx!!

[@AndreasSpiess]

You bet!

[@ImnotChuck.]

Very impressive research. Thanks.

[@AndreasSpiess]

You are welcome!

[@byronwatkins2565]

If they used a triangle wave instead of a sawtooth, then the distance information changes sign (and order) for the second half of the period and the Doppler part is the same. Thus, each could be measured accurately and independently. There will still be an aliasing problem as distance increases enough that more than a half period propagation delay accrues. This can be mitigated by using multiple triangle waves (for high accuracy) or by increasing the triangle period until the returning signal of distant objects is seldom detectable.

[@AndreasSpiess]

You are right. Sophisticated wave forms can be used to extract more information. I assume the frequency can be chosen from the outside of the radar chip and the ADC signal can be read, too. So a lot is possible. We will see what people do with this technology...

[@aboverobotics]

Thank you very much for such new and useful information.

[@AndreasSpiess]

You are welcome!

[@DenisWilsonSouzaRosa]

Your videos are pretty good btw! keep going!

[@AndreasSpiess]

Thank you!

[@Designments]

Thanks for the video. I'm using an LD2410 with ESPHOME, but using the UART and letting the firmware do the heavy lifting. Works really well for controlling lights in kitchen/workshop type environments.

[@AndreasSpiess]

Thank you for sharing your experience!

[@tatali5276]

Andreas, it is cool work!

[@AndreasSpiess]

Thank you!

[@EdFrench_uk]

Lovely addition to my armoury of random sensor for projects!

[@AndreasSpiess]

Good luck with the project!

[@nerdwerx2292]

Oh... No WAY!?Wow, I see my favorite sensor has been upgraded!I will definitely have to pick up a couple of these new sensors ! But as @Assassinlexx mentions in one of the comments "RWLS-0516 will detect through drywall" .That is an important feature for stealth deployment or burglary situations.I hope this functionality is available in the 24Ghz detectors. 🤔

[@AndreasSpiess]

You have to try. 24GHz is quite high and they have a chapter about housing material in the spec sheet. So material of the wall seems to be important.

[@scienceoftheuniverse9155]

Thank you so much indeed. You really save my day Sir.

[@AndreasSpiess]

You are welcome!

[@jmr]

Very interesting! Presence detection is hard indeed.

[@AndreasSpiess]

I hope that these chips bring us closer to the resolution...

[@userou-ig1ze]

Thanks for this, and your research summary. I hope there's a follow up video of the version in your living room (aka 'official' or 'release' version)

[@AndreasSpiess]

We will see...

[@zyghom]

Super nice video Andreas (as usual). However, as you mentioned: the biggest advantage of PIR over these radar based sensor is the current consumption: I am down to 60uA for both: ESP32 sleeping and PIR SR-602. So they can work on battery. This one (and the others on 2.4GHz) are operating at around 1000x higher current so battery for 2 days ;-(

[@AndreasSpiess]

You are right. I thought I mentioned this fact.

[@tarakivu8861]

Unlike a PIR-Sensor which has to be enabled all the time to notice differences, this one probably works if you only turn it on sporadically to check if something changed.

[@cchance]

@@tarakivu8861 Was going to ask if this isn't the case can't a loop be created? PIR Sensor for initial detection, triggers the 24g to start watching, it kicks on every 60 seconds or so checks for motion or motionless to be active still, if it isn't it disables it's restart interval until the next PIR interval triggers to tell it to start monitoring again?

[@AndreasScheucher]

But using them with higher energy consumption still makes sense when the controlled device also has high energy consumption (eg. kW range). Then for sure every minute saved is worth the consumption of the sensor...

[@felix3317]

@@cchance I guess the question is: how long is the boot time for the 24G?

[@raysieber9233]

Far too subscribers few for the value of your content, great video

[@AndreasSpiess]

:-) Thank you!

[@wjn777]

Great video, thanks for sharing. Very interesting sensor, I assume it will work well through a plastic enclosure

[@AndreasSpiess]

It should. But read the data sheet. They have a chapter about choosing the right material.

[@wjn777]

@@AndreasSpiess Thank you for the advice Andreas

[@NickReynolds]

Great I've been looking for something like this for ages. I'm also going to try putting them on a rover I'm building to detect nearby people as a safety aid.

[@AndreasSpiess]

Good idea!

[@adifoto6362]

Thanks for the video, that is not a bad price worth tinkering with.

[@AndreasSpiess]

Agreed!

[@assassinlexx1993]

If you use Rcwl- 0516 chip. They can" see" through dry wall , wood. They are prefect for burglar sensors. As they are hidden inside walls etc.

[@oscarpeters1351]

Those work great, but do not have motionless detection in them

[@bjornroesbeke]

I don't know if the LD2410 module is any better but the RCWL-0516 modules that i have will also detect movement in other directions than directly towards the sensor.

[@AndreasSpiess]

All radars should "see" through thin walls. However, I do not know how good 24GHz works. They provide information of which plastic you should use for the enclosure. So there is an influence...

[@yekutielbenheshel354]

Interesting video. Thanks Andreas.

[@AndreasSpiess]

My pleasure!

[@yekutielbenheshel354]

​@@AndreasSpiess By the way, AutoHotkey on Windows or AutoKey on Linux enable users to create shortcuts. For example, when I want to type "My pleasure" I type "..mp"; whereas, for "Thanks for letting me know. I appreciate that." I type ".tflmk". I prepend shortcuts with two or three letters with ".." I prepend shortcuts with four letters or more with "."

[@lohikarhu734]

It looks to me that it could be interesting/useful to find out where, and when, the power is used, to perhaps architect a system that operates in a pulsed mode, depending on how quickly you need to sense activity or occupancy... Thanks for a good look at this, it seems that a bit of Geduld and prerserverance were needed!

[@AndreasSpiess]

I am sure these radar chips are quite capable. Maybe we will get a module where the radar is not connected to a MCU but to a programmable MCU. Then we could do experiments with changing the frequency etc.

[@andybgrant33]

Love the channel. More mmWave to come ;)

[@AndreasSpiess]

We will see...

[@adrian30497]

Super video. Pls stay on the topic if something new happend.

[@AndreasSpiess]

Sure 👍

[@hobbykip]

This is awesome! I have used some RCWL-0516 in the house but I find them to have quite a lot of false triggers or no triggers. Hopefully this will decrease false positives without the need for a ugly PIR sensor. The nice thing about these things is that you can put them in a small space i.e. aluminium LED strip channels 🙂I've ordered the USB kit to tinker with it.

[@AndreasSpiess]

Tinkering is a good plan to find out how they behave in your situation...

[@DoktorJeep]

What makes you sure those triggers are false?

[@hobbykip]

@@DoktorJeep For my application they are false triggers. The sensitivity of those sensors are hard to adjust and may vary depending on many different parameters not really understood by me. I guess objects and object location already can influence the sensitivity.

[@temyraverdana6421]

Very interesting video. Thanks a lot

[@AndreasSpiess]

You are welcome!

[@taoufikbadri6959]

Love this job !thanks

[@AndreasSpiess]

My pleasure!

[@griaxi4124]

Still working as of today, ty!

[@AndreasSpiess]

Very good!

[@sdrouet]

Very nice video. Pity you don't talk enough about power consumption. I think it's topic that deserve a place in all your videos :) thanks anyway. Continuez comme ca :)

[@AndreasSpiess]

I included the diagram of the power consumption and said, it has to be connected to mains. From then on, I am no more interested in how much it consumes. It is anyway not a lot compared to all other devices.

[@Barc0d3]

@@AndreasSpiess What do you mean it HAS to be connected to mains? Cant it not run from a battery/powerbank/laptop usb? I am probably confused by mains, to me that implies I need a AC-DC adapter to use this

[@AndreasSpiess]

@@Barc0d3 Of course, it runs on batteries. Just big ones because of its high consumption.

[@the-matrix-has-you]

These are the Problems Andreas yes. Good touch on a subject👍 our challange to find or modify low consumption current cheap sensor is still the case.The new Panasonic sensors are really good with 1uA and 2uA versions but it is still so expensive for a avarage maker like us. So I have gone into the modification direction. I have Managed to make HC-SR-501 to work with 3.3volts by removing the Zener Diode and LDO and Bridging Vin and Vout of LDO pins.I have Managed to lower its current consumption this way now HC-SR-501 consumes around 38 or 39uA at idle (when movement is not detected) but if it detects movement it can even go up to 300 uA not very good for battery Powered operation in my book. Maybe those new found Radar sensors are the new saviour maybe... I hope so. Thanks Andreas Spiess for your awesome videos! Great content as always!

[@AndreasSpiess]

Your solution is good. Aqara Zigbee PIR sensors are also a good choice if you can live with only detecting movement. They consume nearly nothing. Amazing tech. And cheaper than the Panasonic sensor alone ;-)

[@the-matrix-has-you]

@@AndreasSpiess maybe I should buy one and one zigbee gateway reverse engineer and understand how they decreased consumption that much. 👍Thanks for the tips Andreas your content is Superb as always. I have also lived in Switzerland for 2 year in Grabünden Region near St.Moritz in boarding School. Love your Country so much The Nature and the Swiss people in southern parts are always greet and say Grüß Dich and Smile😀 no matter if you are stranger or not. I see Switzerland as my second country. You Swiss folks are really kind and have a good understanding of how to be a good Human Being. Swiss are always helpfull and kind. Thanks Andreas. Every country should take lessons of principles what you guys have done.🇨🇭🇨🇭🇨🇭See you again until next video of The Guy with a Swiss Accent🖐️

[@AndreasSpiess]

@@the-matrix-has-you Thank you for your kind words. Yes, we love peace. But I am sure you find nice people also in your country! I learned that they are everywhere. I have plenty of nice people like you from all over the world commenting on my videos...

[@the-matrix-has-you]

@@AndreasSpiess Thanks Andreas, I have a new Record to announce! I used my new pir sensors AM312's and modified them.For those who are using AM312 PIR Here is how to lower consumption even more and make it work properly with 3.3v first remove LDO HT30 respectively and bridge Vin and Vout then add 1uF capacitor to Vout and GND pins and remove the only one smd resistor as it is labeled R1 and bridge resistor pins with little solder. Then AM312 will work much much more stable plus it will consume around 6 or 7uA😀 now with AM312 pir sensor and my custom wemos d1 mini wake up shield and wemos d1 mini with LDO removal consumes around 163uA with my new calculations over 470 days of running capable sensor with a single charge! Success👍

[@wojciechwaga1587]

Dziękujemy.

[@AndreasSpiess]

Dziękuję za Twoje wsparcie!

[@peterkuemmerli7695]

Dear Mr. Spiess many thanks for this informative video about the LD2410 Sensor. With some shielding it is quite easy to make it sensitive in small angle direction and not sensitive from the back-side. It does not work with 12V DC, I, was baking one sensor already, take 5V DC... About soldering it is easy on top side plus = at the capacitor / signal = outside pin. solder minus on the back side by the testing contactors. I use this great sensor for my time - capturing project, it works perfect on a distance of 3m.. like a laser beam... If you wanna test it his way, i can send you some 3D Printing models... Best regards, Peter

[@AndreasSpiess]

I would be interested in the 3D models because I got now LD2410B (bluetooth) sensors. Maybe stuff for another video. Yo can contact me on Facebook Messenger or Twitter

[@peterkuemmerli7695]

@@AndreasSpiess Ok, was sending you a message trough FB, the STL files and photos are coming soon. i am looking forward, to integrate this smart , robust and cheap sensor into bluetooth networks, can be a good additional sensor for target recognition as a feature in my time-measuring application . Many thanks and best regards, Peter

[@michaegi4717]

In general FMCW-Radars can do crazy things, if you combine them with intelligent software. If you assume that objects don't change their velocity extremely fast, you can use a set of frequency modulations with different ramps. With this trick you can detect distance and velocity of several objects. For a long time this was the technology for radar sensors for advanced driver assistance systems in cars and trucks.

[@AndreasSpiess]

Good to know that this technology has even more potential! Maybe in the next chip revision ;-)

[@pizzablender]

I think a sine wave FM can be used, correct?

[@michaegi4717]

@@pizzablender Usually they use liniear ramps with changing gradients. The frequency shift is a combination of time of flight and doppler-effect. For each echo you you just get a combined information if distance and velocity... combining different gradients enable to calculate the velocity and distance seperately. A saw tooth-pattern is possible, but I think a series of positive gradients is more common. A true sine wave FM would make it close to impossible to do the calculations. And I guess that the constantly changing echos will make it hard to receive a significant power in a specific frequency.

[@klassichd10]

Many Thanks! Very interesting sensor! Maybe it could be used as a rain sensor, too? Currently, my motion sensors mostly are PIR sensors, because of low power, battery operation and zigbee compatibility. I have one or more of them in every room. All of my lights are controlled by motion sensors and ioBroker. Very convenient.

[@AndreasSpiess]

1. They seem to be quite sensitive to motion. So maybe it is worth a try with rain. 2. I love these Zigbee PIR sensors, too. They run forever on a coin cell...

[@klassichd10]

@@AndreasSpiess @ 2: yes indeed, they are not very power hungry. Most of them, I could hide close to a piece of furniture and could also hide 2 AA batteries in the furniture. So, the batteries run even longer and I do not have to touch and readjust the sensors when changing batteries.

[@manu808]

Excellent! 👌

[@AndreasSpiess]

Thank you!

[@mmoci81]

Hopefully you will revisit this subject. Very interesting. Enjoing your channel. Whis you all the best.

[@AndreasSpiess]

We will see...

[@geri777]

"Radar Presence Detector" - und ich dachte, jetzt gibt's ein nützliches Radarwarner Projekt 😁 🏎

[@AndreasSpiess]

Wäre auch eine Möglichkeit gewesen. Leider illegal wo ich lebe :-(

[@veronicalogotheti5416]

Thank you Nice study

[@AndreasSpiess]

You are welcome!

[@helmutzollner5496]

Very interesting. thank you

[@AndreasSpiess]

Glad you enjoyed it!

[@jrioublanc]

Thanks a lot, I was looking for an alternative to PIR sensors, you did it!

[@AndreasSpiess]

You are welcome!

[@PerfectInterview]

Here’s a tip, if you mount a PIR sensor on a servo, you can move the sensor in a scan pattern and get a presence detection even if the person is not moving.

[@AndreasSpiess]

Interesting idea!

[@dan-nutu]

Interesting indeed. Wouldn't it generate (more) false detections though? If there are (larger) objects with different temperatures (e.g. radiators) those would appear as "moving" to the sensor

[@AndreasSpiess]

@@dan-nutu This movement is probably slow.

[@graemehughes9910]

Thank you so much! !!

[@AndreasSpiess]

You're welcome!

[@MikeNugget]

Awesome review! Fun fact: you can track moving objects in the living room just with your 2.4Ghz router 😮

[@AndreasSpiess]

That saves you money if you know how to do it...

[@fir3w4lk3r]

Rally nice video!!! What model is the multi arm helper you use?

[@AndreasSpiess]

I do no more remember :-( It is already old.

[@tobimai4843]

Loxone has Motion + Noise sensors, that's also a smart concept IMO

[@AndreasSpiess]

A noise sensor for sure would create a good signal for the TV. At least the films my wife watches ;-)

[@dfgdfg_]

I don't know why, the image of you laying down on the sofa at 0:14 was really funny 🤣

[@AndreasSpiess]

:-)

[@serggorod1423]

Good job 👍 ,

[@AndreasSpiess]

Thank you!

[@charlesurrea1451]

there was a company called Radionics alarm. They had an early microwave field disruption sensor. Much like the old Viper car alarm. Sadly it went through walls and had to be custom tuned for every sensor.

[@AndreasSpiess]

Radar usually works through walls. But the higher the frequency, the lower this feature. And with today's software adjustments it is probably easier and cheaper than back in the day.

[@thetinkerist]

Super thanks!

[@AndreasSpiess]

You are welcome!

[@galmagen6212]

thank you for taking the time for exploring the modules and explaining them as you do, we are actually learning from you, thank you! is it safe for constant use for years in distance of 0.3m between human and sensor?

[@AndreasSpiess]

I think so. They do not emit a lot of power.

[@galmagen6212]

@@AndreasSpiess do you know what is the standard for safety using radar ?

[@AndreasSpiess]

@@galmagen6212 No, I also do not care too much.

[@WebmediArt]

Mehr zu diesem Thema bitte :)

[@AndreasSpiess]

Was wäre denn interessant?

[@punkyproductions5153]

I like your steampunk attitude 🎩😎

[@AndreasSpiess]

Thanks!

[@t1d100]

Wonderful.

[@AndreasSpiess]

:-)

[@luisrey8986]

Excelente!👍

[@AndreasSpiess]

Thank you!

[@tanerriko3635]

very informative😍 video

[@AndreasSpiess]

Glad you think so!

[@wherami]

interesting. thank you

[@AndreasSpiess]

You are welcome!

[@MathieuFRAPPIER]

Thanks!

[@AndreasSpiess]

Thank you for your support!

[@livetohash6152]

I got one (with I think 2.1 firmware) connected direct to Serial1 on my Mega, absolutely AMAZING! Needed to mod the cpp to fix up some things for debugging, but this thing is awesome!!! Can detect coming, going and I'm testing the energy for lateral, n formulas are working... This is well worth 7-9$US IMO 🎉🎉🎉

[@AndreasSpiess]

Thank you for sharing your experience!

[@effendyabdullah]

Should try the LD2410B, you can configure the sensitivity using the Bluetooth App. I'm using LD2410B in my 2 bedrooms connected to ESP32. It could also be used standalone without an MCU so a great candidate for battery operated Bluetooth radar presence sensor.

[@AndreasSpiess]

Do you have more information?

[@effendyabdullah]

@@AndreasSpiess check my channel there is a short video of the app. I think i left a purchase link there. Edit: the purchase link is on the comment of this "trashy" video ;-) -> kzbin.infowgP3yod4ALI If you need a translated screenshot of the app, tell me.

[@Barc0d3]

Wait, whats the diff between the LD2410 and the LD2410B? Only the bluetooth capability?

[@effendyabdullah]

@@Barc0d3 I don't see any diff using it the past few months. LD2410B has Bluetooth which is much more convenient when setting up the sensitivity.

[@gijsqwerasdf]

You are the best

[@AndreasSpiess]

:-)

[@craigpalmer9196]

very good

[@AndreasSpiess]

Thank you!

[@allaboutmygunner9762]

I purchased a few of these and found they did not work. Then I found a HW-MS03. Fantastic! Today I played with. Hi-Link HLK-LD2410C-P microwave sensor that. At 1st I thought there was something wrong with it. Always on! Then it occurred to me. I am in front of it, even motionless it was still on. I propped it next to my door with a mirror and went down the hallway. Once about 15 feet away, it went off. Works marvelous!

[@AndreasSpiess]

Strange that they did not work. But I agree, the HW MS03 are easier to use.

[@victorma2307]

@@AndreasSpiess is the HW-MS03 better or worst than the LD2410 in terms of accuracy, distance detection, interference, etc?

[@AndreasSpiess]

@@victorma2307 They are different, as you see in my videos

[@AndreasScheucher]

Hi Andreas, Andreas here ;) I never toyed with sensors like this one, but wanted to confirm my assumption: These sensor will not work through glass or plexiglass, isn't it? And thanks for the nice introduction to the device!

[@AndreasSpiess]

Radar passes material (other than for example light). There is a chapter in the datasheet on which plastic is better. And: the higher the frequency, the bigger the loss.

[@ted_van_loon]

1,25cm wavelength(1.25cm to inches for people in usa). that is around 1cm of precision with even a single one of those(which around 1cm but then converted to American units for people in USA). however the interesting thing is when you use it as a phased array by using multiple of them(similar to the 5g antennas in a smartphone) then precision of smaller than 1mm can be reached easily due to the ability to focus the radiowaves on small sections and move those focus sections. however in my case what I was mostly interested in now since modern smartphones already can make such 3d scans at around 0.1mm resolution easily(yes it is there, the software for it is there as well, this can be used to detect problems in the body and diseases due to being capable of making such detailed 3d scans but also inside of you, but somehow you are not allowed to use it since the 5g phased arrays in your phone are typically propetairy black boxes put into other propetairy black boxes that prevent you from using it, but you have no way of knowing if other people are using it on your phone, so support foss, especially such technologies which can also be very dangerous and privacy intrusive(such advanced 3d scans even through your clothing and body, and still having decent range is a serious privacy and security risk) it should be gnu+foss), to instead just make simple 3d scans the easy way by using 3 sensors to get width height and depth, this also takes way less compute power. only using 3 sensors or 3 measure points to make 3d scans with around 1,25 to 5cm precision is still very useful for example or motion tracking, fun, looking through things(like x-ray glasses but then actually working), etc

[@michaellakeman4208]

Metric is so much easier. I can't understand why any country hangs onto imperial. Mind you, we still buy that vital fluid in pints here in the UK🍺

[@vazquezjm]

Hi Andreas. Excellent video as usual. I just a couple of these sensors and was wondering if you have done any testing on human vs dog/cat detection? Basically, I'd like to trigger an automation based on that. Thank you!

[@AndreasSpiess]

No. We have no dog and our cat passed away :-(

[@vazquezjm]

@@AndreasSpiess so sorry 😔

[@TheRealAnthony_real]

Best room presence detection so far is frigate and double-take, disadvantages are that you need RTSP cameras in every room and the whole setup ain't cheap

[@AndreasSpiess]

True

If this thing is so sensitive, would it not give false positives due to flys moving? Really nice video. As always..

[@AndreasSpiess]

Flies are probably too small if they are in a distance.

[@VRNC-kn5tf]

Hello I would love to see a video about radar sensors that would be strong enough to be put into a array and potentially detect drones in the sky or birds and such.

[@AndreasSpiess]

These radars are extremely expensive. And need a license :-(

[@planker]

That thing is Cool.

[@AndreasSpiess]

I agree!

Thank you, I'll definitely play with that module :) Btw, there is probably a mistake in the links list - the "LD2410 including base" item points to the same URL/listing as the "LD2410 Sensor"

[@AndreasSpiess]

Thank you for the info. The link should be ok by now.

[@stephanberger7455]

@@AndreasSpiess Both links are dead now…

[@doejohn8674]

@@stephanberger7455 They are working right now, at least from Switzerland

[@AndreasSpiess]

@@stephanberger7455 Do you use an ad-blocker?

[@stephanberger7455]

@@AndreasSpiess No ad blocker, the link to the FP1 sensor is working...

[@eskimojo97]

Dear Mr. Spiess, thank you so much for making this video and explaining about LD2410 so clearly. After having struggled with an RCWL-0516 with so many false alerts, I ordered the LD2410. After hooking everything up (Wemos D1 Mini, and the LD2410 module, that's it), nothing seems to be getting detected. Is it mandatory that I update the firmware before it is used in any way? Out-of-the-box implementation doesn't seem to work. Would appreciate any insights, at your convenience.

[@AndreasSpiess]

I did not update anything. Maybe you check your wiring. Changing RX/TX sometimes help if it is mixed. Otherwise you have to see what is coming from the sensor in its TX pin.

[@SchmurtzAlex]

Very interesting. It could be useful in my water closet where the light shut off regularly in stationary position 😂 But the switch is near the head when we seat, I’m not a psycho on airwaves but I don’t know 24ghz effects. PIR doesn’t emit anything so that’s a little advantage on this point of view.

[@AndreasSpiess]

Look at the power it emits. And you could select the timeout for the PIR accordingly. Then it also would not switch off, or at least as a signal to go ;-)

[@Monochram]

Wow thanks for the information! There are also pretty cheap 9 segment FLIIR/Infrared sensors. Did anyone tried these? Can u do a video about them?

[@AndreasSpiess]

You are welcome!

[@wpherigo1]

Fascinating! Why though do you care about FCC certification? You live in Switzerland, presumably…. Keep up the great work!

[@AndreasSpiess]

Because it gives some credibility to the manufacturer and the product. And I can see its test results.

[@elementaldraco]

Intrigued to know how this performs in environments where there maybe high levels of atmospheric disturbance. Such as clean air movement that can't be blocked off. My workshop is in an old barn.

[@AndreasSpiess]

I do not know. But radio waves usually are not disturbed too much by dry air.

[@efimovv]

Some 60GHz models states they can detect heartbeat to the level of alarm if it out of range. If that true then they will work correctly in noisy envirionment.

[@janzhang9432]

If you can put this little thing into a tin can (as wave guide), maybe you can increase the measuring range. a wave guide can focus the energy of microwave.

[@AndreasSpiess]

Maybe. I did not try (yet)

[@albanprada7183]

Thanks a lot! Excellent video. My question: Is it possible to use that sensor for people counting? - Bus passenger counting.

[@AndreasSpiess]

Maybe. If you can separate them enough.

[@kellymoses8566]

IP camera using Frigate or similar image recognition software provides the most reliable presence detection.

[@AndreasSpiess]

Thank you for the tip. Probably a little different price tag!

[@chuxxsss]

Oh no mate, radar, ranger gates. No gold just got home holidays. Love the digital display.

[@AndreasSpiess]

You seem to be busy anyway ;-)

[@levran75]

Many thanks for the video, very informative. Tell me, did you have problems with overheating when powered by 5 volts? This module with esp8266 works fine for me now, but the heating around 40-50 degrees Celsius is a little disturbing.

[@AndreasSpiess]

I probably did not check the temperature

[@eskimojo97]

@levran75 I hooked it up to the 5v pin of a Wemos D1 Mini and the LD2410 felt a little warm within the first minute of hooking it up. Thought that was unusual. I've not had it on for a long time and I wonder how the module will hold up when deployed for a longer time.

[@marcs.8384]

Hello Andreas. Thank you for this very clear presentation. I just received the LD2410B Kit and tried to install it. It perfectly detects presence and movements. The problem is that it does only communicate its data through USB cables. It does NOT PAIR to any Bluetooth device (laptop, phone, Raspberry Pi 4B with BT). For example, I can integrate it into Home Assistant/ESPHome, but use it ONLY when it is connected to my Raspberry Pi by cable. Any help would be more than welcome. Thanks!

[@AndreasSpiess]

The "B" version is only laying on my table. I never tried it :-(

[@TheDaniel366Cobra]

Good to see FMCW sensors are becoming more available to hobbyists. Is there currently any reasonably priced small radar altimeter for drones?

[@tissuepaper9962]

Pick one: -Cheap -Good -Readily available as a complete product for end consumers

[@AndreasSpiess]

I assume the allowed power on ISM bands (and the price tag of amplifiers) does not allow ranges of more than 10 meters for reasonably sized objects like humans...

[@alessandroalfonzetti3892]

Very interesting! But can it "see" multiple targets? Or is there a value that can make you understand that there are multiple targets?

[@tomsherwood4650]

Radio alitimeter runs at 4.3GHz, FM CW with 100 MHz deviation. The modulation is triangle wave, not sawtooth. Power output about 1 watt. Measures distance to ground comparing transmit frequency to reflected signal. It only cares about distance, not motion.

[@AndreasSpiess]

Thank you for the additional information.

[@marcofe82]

Hi Andreas, thank you so much for the video and I wanna ask you a question, what do you mean for "slow moving objects"? I mean, how much slow? thank you!

[@AndreasSpiess]

Slow like a human, I think. But I cannot give you a number. The doppler effect adds to the distance and the sensor becomes less accurate.