SmartThings Community

Iris Motion Sensor (2nd gen, 3326-L)


(Jason "The Enabler" as deemed so by @Smart) #323

If my memory serves me correctly, which it probably doesn’t… but I believe ST see a 2.7 as the low end of the battery life.

Maybe @JDRoberts remembers what that range is.

(Jason "The Enabler" as deemed so by @Smart) #324

I had a battery reading 1% yesterday. I swapped it out and just threw it away. It was the original battery and was about 2 years old…

I hate this battery issue for everyone, those things are not cheap at all.

(Robert M) #325

On my multimeter, a new CR2 battery like the one I use in my Iris sensors registers around 3.2V (with my multimeter set to 20V DC). By the time it gets close to 3.0, it’s practically dead. I don’t recall what exact values correspond to ST’s battery percentage reporting, but lithium batteries don’t decline in voltage in a linear fashion–see, for example: This makes it difficult for the DTH to predict remaining capacity based on voltage, especially since it plateaus for a bit after a slight initial dropoff and a sharp final dropoff if it’s even still usable at that point. I’d be hesitant to rely on ST’s reporting given this difficulty.

(My multimeter might be reading this all a bit high; I’m not sure how well calibrated it is for these voltages—certainly appears to be a bit higher new than on the Energizer chart above—so if you have one you may want to test when new and “dead” to compare.)

(Seth Daniel) #326

Does anyone know if this works for the 3326-L2? These are currently on sale at Lowe’s for $15, and I’d like to buy several, but I want to ensure they work with SmartThings first.

(Jimmy) #327

If what works? They work out of the box now.

(Seth Daniel) #328

This thread seems to be about the 3326-L model.

There is also a 3326-L2 model, which I don’t see mentioned in many places.

I’m currions if the -L2 works in addition to the -L. I’m guessing the answer is yes, since it seems to be a new version of the same sensor, but I’m not sure if there’s an important difference for SmartThings compatibility.

(Jimmy) #329

They’re the same sensor, only difference is the packaging


Well, a couple days ago had another one go into meltdown mode and start registering false motion every minute or so. Replaced the battery but then sadly another for the waste bin.