Has anyone had a V1 contact sensor Brownout while using them on the new hub? I don’t think they are really bricking on the new hub, at least not as often as they did on the Bridge connected to the camera. Here’s my hypothesis with the relevant details highlighted:
So it says the sensors only brownout in rare conditions involving a couple of relevant factors: 1.78 V with a 2.25 mA current draw AND THEN ALSO within 2 narrow windows, each of which involve it running a specific stage of the boot code execution…commonly happening when the device is resetting during this time.
My hypothesis is that the Bridge had a less stable connection (than the hub does) and so the V1 sensors lost connection more often and they would basically reboot to reconnect. If this occurs when the battery is close to being dead, then this routine created a BOD (brownout event), if not, it didn’t brownout and the sensor was fine even if the battery died (I had several sensors that didn’t get destroyed when the battery died, so I can verify it didn’t happen every time, but I have lost a couple, so I do know it does happen)…since the bridge was less stable, and had a weaker broadcast (partially because it didn’t have as much power and piggy-backed off the cameras), sensors would brownout a lot more often while rebooting. With the new hub, the connection has been really stable and so there are fewer BOD events. Lots of other products also use the same chip and many of them don’t seem to have the brown out issue discussed as publicly. Thus, I am starting to think the Bridge may be a partial catalyst for increased rates of brownouts in the sensors…I am probably going to keep most all of my V1 sensors on the new Hub now just in case, assuming that it does reduce the risk in the future. I haven’t had any go bad in the last year since I’ve had them on the hub. Again, I don’t know if any of this is relevant or accurate at all, it’s just a hypothesis, but it seems possible.