Yup know issue that they do not work with V1 hubs. Was posted in the 1st post as a warning in this and most Xiaomi device threads.
I have 4 of the round temp/humidity sensors and have not been able to pair one of these. Been trying for over 5 hours…is there a post or instruction anywhere? I’ve been reading all over the place and there’s about 10 different answers but looking for something that works…
Thanks!
Last activity ~~10 hours ago that’s when I created the device and handler…
The way I do it is to hold the reset button in for 10 seconds to reset the device.
Then click on add a thing in the app.
Then press and release the button a few times.
If it does not appear I stop the pairing and then try again. Usually it appears the second time in a worst case.
EDIT. Someone has posted a manual on here somewhere but I cannot find the thread.
I think it’s the same for all xiaomi sensors so here’s my way pairing them:
- Reset the device: hold the reset button for a few seconds, led will blink a few times then stop, hold for some more seconds then release the button.
- Add a new thing from ST app
- This may be tricky: short press the reset button for some times, if it quick blinks 2 times followed by another 3 times, keep short pressing it after that 3 times blink and you’ll get it discovered. If it doesn’t blink in that sequence, do whatever you like, short press, long press (but not too long or it will reset), smash that reset button until you get that 2 quick blinks followed by 3 quick blinks, you’ll get that eventually. That sequence is the only thing you need to get it discovered
Wish u luck!
Thank you for the help I’ve tried BOTH and neither work…I’ve tried variations of both and nothing is working they will not connect to the hub.
Have you tried the catchall method?
Honestly this is my first go around so I have no idea how to even do that…
Catchall method.
From the app start "Add a thing"
Press and hold the button on the temp sensor until you get 3 flashes
When complete make sure that when you press the button the device give you two flashes on the LED, if not repeat step 2 until that happens.
Using the IDE look at the logs, not the live logging but the hub log (select hub, then select events)
Look for a catchall event at the same time as you pressed and held the button. You will see something like this:
catchall: 0104 0000 01 01 0100 00 B46D 00 04 115F 0A 01 01FF4231641000032814983900000000953900000000
Make a note of the device ID, in the case above it’s B46D (7th set of chars from the left)
Return to the IDE and manually add a device.
Enter the details and when asked select "Temperature Sensor and make sure you set the Zigbee and network id to the same value you found in step 6.
That should work. The main issue I had was that I was looking
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Post 457.
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OK added it that way now to see if it actually shows me anything 
Not sure how long it takes…
BUT Thank you so much for that info!
Just keep pushing the button and refreshing the events page in the IDE as the page does not automatically refresh.
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I’m seeing it when I update the events in the hub but not showing in the app on my phone…and OH Thank you…what you told me I did in 4 minutes for all 4 of them LOL I’ve been hours trying to get this working…
HUGE Thanks!
Now you need to manually define the devices in the ide and use the code that you see for the network I’d.
Ok now a trick question…apparently I have 2 of the sensors with the same id…I used catchall and it is right…
No. Perhaps the device was found but did not show up in the ST app when you were doing add a thing and pressing the button.
Try deleting the one you manually configured and see if the other one is working OK.
OK I’ll work on that today and see what I can do
Probably just going to have to start over but at least I know how to do it now!
They haven’t updated in the last 35 minutes…
Sorry, been busy for the last couple days. I would have pointed out @ArstenA’s code:
if (temp > 100) {
temp = 100.0 - temp
}
…but you found it!
So what about the Celsius to Fahrenheit code you came up with - does it work now? And did you put in a pull request on GitHub?
Well deleting them was a bad choice now I can’t get any of them connected again… 
Beyond frustrated.
Reset them again. Hold the button in for 5 ish seconds and the blue LED flashes.
I was using the handler directly from A4refillpad’s github. I switched over to the one in @ArstenA’s github. It’s based off the original A4 one, but a few changes to handle colder temps and better battery reporting. I don’t know how I didn’t find this in my original searches. 
I’m using his now for my Xiaomi motion sensors too.