Taichuan zigbeeTuya Wifi Human Body Detector Elderly Fall Sensor / Human Fall down YTW

Hardware
1

Posted this into a thread for a similar device, though then I noticed this one has a different chip and figured I should put it in its own thread:

So I ordered a small variety of presence monitors to test out, and this one’s arrived first (price seems to fluctuate a bit, it was $15 less expensive a few weeks ago):

I got the wifi model, which looks to also have BLE and is powered by a C3BS. Shows up in the Tuya IOT portal as “CB3S_云帆主设备-跌倒检测_Wi-Fi+BT” and comes with instructions in Chinese only. Pairing with the Tuya Smart app was quick and easy, and it shows up in HA via the Tuya integration as “Human Fall down YTW”.

Most of the functionality is missing in HA (at this point); the only parameters that make it over are binary_sensor.human_fall_down_ytw which looks like presence on/off, and number.human_fall_down_ytw_sensitivity which runs from 0 to 10. The device also does fall detection, “static dwell” (when there’s presence that’s continual without motion), has a light sensor, and different presets for different room types. Which all show up in Tuya’s app.

Would love to have more of this in HA, though it looks like those two parameters are the only ones being transmitted out through the API by Tuya? A lot more does show up in the device log:

image
image1513×997 43.7 KB

1 Like
2

Just popped the thing open, here’s what’s inside:

C3BS and board with two USB-C ports (both are externally accessible as mounting options)

signal-2022-06-08-171825_005
signal-2022-06-08-171825_0051920×1440 313 KB

Sensor is socketed on top:

signal-2022-06-08-171825_006
signal-2022-06-08-171825_0061536×2048 462 KB

signal-2022-06-08-171825_001
signal-2022-06-08-171825_001983×845 116 KB

signal-2022-06-08-171825_002
signal-2022-06-08-171825_0021033×914 101 KB

signal-2022-06-08-171825_004
signal-2022-06-08-171825_0042048×1536 470 KB

I’ve seen elsewhere that an ESP-12F may be a good replacement for a C3BS, so I may try that.

3

Did you do the swap?

I have a cheaper presence sensor and the swap with ESP-12S was a standard procedure

4

I never did, ultimately don’t think I trust my soldering skills enough for this, and realized potentially having to chip swapping a bunch of these wasn’t a scenario I wanted to line up anyways.

But thankfully, it looks like there’s been some significant headway with OpenBK7231T_App and these CB3S chips. I don’t think I’m adept enough to get this thing working with this unsupported device on my own, but I may try regardless :rofl: and if nothing else will definitely be up for testing anyone else can get the basics going.