I have some Roost Batteries that I no longer need. Only been used for about 1 month before I changed my Smoke detectors out with Halo detectors so I have no need for the Roost Batteries. Integration with ST using IFTTT has worked well for me with these not much lag from IFTTT. Let me know if you are interested. I have 7-8 of them. I am asking $20.00 a piece for them.
I am interested in using Roost batteries with my ST hub. Also curious about your experience with halo detectors. Did you eventually sell them?
I don’t think Roost batteries have a DTH with Smarttthings hub so no way to integrate those. I still have my Halos connected with ST and they work fine with no issues.