DFRobot mmWave Human Presence Detection Sensor

[pietervanharen]

I’ve bought a couple DFRobot mmWave sensors and intend to use that to trigger the screen of my Magic Mirror.

But the only wire schemas I can find are for the ESPHome or an Arduino, while I would like to wire it directly to the GPIO ports of my Raspberry Pi 4 that’s running Magic Mirror.

I’ve looked at the MMM-Screen-Powersave-Notification that uses a HC-SR501 PIR sensor, but I couldn’t work out how to make that work with an mmWave sensor. The PIR sensor uses a single wire to trigger the screen, while the mmWave sensor also uses a serial connection.

Anybody have any suggestions how to get started? Of course I can just use the PIR Sensor instead, but I like to use the mmWave sensor because I can hide it in the frame.

[sdetweil]

@pietervanharen typically there are only 3 wires

power (pin 6)
ground (pin5)
signal (pin 4)

so, power and ground should be easy, and picking an available gpio port should also be easy

and if you want to.program change it’s behavior the you would connect pins 1 and 2