AM312 Mini PIR Motion Sensor (2 Pack) – Infrared Detector, 3–5m Detection Range, 2.7–12V Input, Low Power Design, for Arduino, ESP8266, Raspberry Pi

very sensitive I used this to make a motion sensor fan when you walk into the room the fan comes on automatically

These fix all of the problems the larger motion sensor have. Wireless signals do not cause false positives like they do with other motion sensors. I'm using these attached to esp8266 boards and have had no problems. I will definitely be ordering more!

It works, there is nothing wrong with it. The only problem for me was the lack of configurations, in particular, duration before shut off. There are other options for the same money that have pots to change sensitivity and duration, which also can be modded to run from 3V.

They're small and they appear to work pretty well when they work. I ordered two. One works fine and the other arrived dead. They're good out to 10 or so feet.

Work well with esp8266 boards where other PIR sensors don’t. I wish I knew about these earlier.

Bought these to repair a outdoor security light where the PIR had failed. Slightly different pattern but as an engineer I rebuilt the board and the repaired item worked perfectly first time. These PIR modules have a very low working voltage (which was needed because the original device was powered from a Lithium cell) and carry their own interface on a tiny pcb. I've now got a spare as there are two in the package so each one only works out at £3.14. The 2.3 second delay for turning on and off is perfect for a security situation and the quiescent current is so low I I couldn't measure it. They are also very sensitive, picking up even slight temperature differences moving across the ambient background and have a wide angle capture that seems greater than 90 deg.

Sensori di movimento molto piccoli e discreti, utilissimi se montati con schede ESP8266 o 32 per domotizzare la casa. Un po' cari visto ciò che offrono.

Mi è piaciuto il prezzo per piccoli utilizzi, ovviamente non lo si può usare per tutte le situazione e l'istallazione è per esperti.

Fantastico facile de installare e di montare lo consiglio

Ottimo, come da descrizione