Flagging this related device in case there is interest over here. Cheers.
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From testing it looks like having it mounted 3 tall x 2 wide (like in the image below) would give a 100x40Ā° beam.
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Hello All
In past I wast trying to set up RCWL-0516 chip. Didnāt get very far as other commitments kicked in and I didnāt have time to progress this.
What is the differance between the two?
Also, instead of the USB cable, can you have a rechargable battery?
Thank you
This seems to reflect what Iāve tested alsoā¦ Note Iām assuming 100 x 40, means 100 horizontal, 40 vertical. Whatās bugging me is whyā¦ 
The DFRobot spec says 90mA so think you may struggle to get a meaningful battery life out of it, while running all the time. Iām currently measuring the temp of the enclosure around 10 degrees above ambient so think it is consuming quite a bit of energy.
Seeing as the DFRobot is out of stock in most places, Iāve seen this 60 Ghz alternative, do we think this could substitute as a replacement? This would be my first time making a DIY sensor, so want to make sure before I purchase anything.
https://www.mouser.ca/new/jorjin/jorjin-mm5d91-00-sensor-module/
I was curious about this one as well and have looked at the datasheet which appears decently thorough; including radiation dispersion patterns.
One important difference with this sensor is that it requires local software installation for configuration using their software and no communication protocol is explained in the datasheet.
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Hereās a video on using the dfrobot sensor
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Inceptionā¦
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Why do so many youtube videos have no useful information in either the thumbnail or the title. This drives me mad !
(Rhetorical question - I know the answer. But it still annoys me to no end.)
Too keep this comment somewhat on topic, Iāve ordered my first sensor through Pimoroni. 
It was in stock there and should arrive in a few days.
Thanks to everyone who took the time to research & document this particular sensor !
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The latest project has been postedā¦
Hi, great guide and and awesome that you share this with us.
I am looking to make this but found that DFrobot also has a smaler sensor mmWave Radar Sensor Arduino-Human Presence Detection Wiki - DFRobot
You think this will work also, similar spec but on the 5.8GHz band.
And cheeper.
Want to do around 10pcs so finding a similar but cheaper sensor would be awsome.
Also, thought about something elseā¦ Sliding doors usually use this kind of sensors.
Would that not be possible to connect to an esp also?
Iām sure you could but 12-24V, youād have to power it from some other source, I donāt know of any boards that will output more than 5V.
Plus wouldnāt the range on these be quite low ?
Yeah power you need to work aroundā¦ And it states that if you mount it 2m up and point it down, the range is 2mā¦ I guess the real range is similar to other sensors if you not point it to the floor.
Anyone know if thereās been an implementation of the df robot board using zigbee for communication instead of wifi? Or if thereās a zigbee equivalent to the wemos d1 mini?
What is the advantage of zigbee vs wifi for you in this ?
What is the advantage of zigbee vs wifi for you in this ?
Range. I have multiple zigbee routers throughout the house that cover better than my wifi.
Iād also rather keep all my SH stuff on the same connectivity standard.
Wait for the new ESP32-H2 and hope ESPHome adds support?
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Also in theory with zigbee there could be a chance to power it with batteries, right?