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I use three of these IR transmitters to steer room fans, air condition and an electronic device which steers my pv module. It is the battery version, not the one with usb power.
I use it in Homeassistant with zigbee2mqtt.
It does not repeat IR signals as far as I know.
IT works perfectly fine even in spots where I thought that would never work. If something does not work it is a bad zigbee connection. (Which I have outside at the PV module control box)
If I recorded the same IR button from a remote control several times, it always gives a different code. But that does not matter because the unit which receives the signal does work even if it receives the same code over and over again.
No complains yet. (In use since 2 months.)
Funcionan perfectamente. Muy buenos acabados, la iluminación de los interruptores con poco luz funciona genial. 100% recomendable.
I love it! So easy to install. I mostly open/close vertical blinds with remote but using the app is just as convenient. Will buy more in the future as I need them.
Nice and compact, easy to setup thought the RF remote needs better instructions.