I have read several reports/reviews where the Vallhorn mentioned to be very slow (latency > second) and people who have the older Tradfri consider the Trafdri better.
Any experiences here, worth buying or better leave it ?
I have two VALLHORNs that I use with a Sonoff dongle and Zigbee2mqtt. I’d say that they’re fairly reliable, and that placement is everything. I never used the older models, so I can’t compare.
I suspect that the issue most peopel have is sensitivity, meaning that the Vallhorns don’t trigger unless they see a lot of movement. Sometimes they’ll pick me up on the edge of the range, and sometimes not. Once I move directly in front of the beam, I think they’re pretty quick to report. I’m definitely not seeing lag measured in seconds.
For the price, I’m perfectly happy with them and my IKEA PARASOLL contact sensors.