Ikea smart home stuff uses Zigbee, and just about all of their devices are supported in Home Assistant, either with ZHA or, better, zigbee2mqtt. I have dozens of buttons, bulbs and sensors from Ikea and they are very reliable most of the time.
I’m running ZHA at the moment, but some of my devices (mainly the plant humidity sensors) keep falling off the zigbee network for hours at a time. I’ve heard zigbee2mqtt resolves a lot of issues with ZHA, would that have any effect?
Hard to tell, it may have to do with your zigbee coordinator or the number of repeater devices in your network.
Which coordinator do you use?
If the network is not well meshed then the link quality could be too low for the sensors to reliably stay online. Adding repeater devices (mains powered devices like bulbs) could help here. Or if you have too many devices your coordinator may be overloaded. I had this problem for a while where I basically had to restart the coordinator because every device was offline. This happened once or twice a month. A firmware update helped here.
Generally zigbee2mqtt is superior to ZHA in my experience, but a little more work to get running. But you will find lots of documentation and YouTube tutorials on how to set it up. Not sure if it will help if your network is “weak” though.
But even if your zigbee network is great there are some devices that are just shit. I have a few analog LED controllers that randomly drop off the network and will only rejoin after cutting power to them. Doesn’t matter how good the link quality is, they go offline sometimes.
So maybe the soil humidity sensors are just not good?
Which coordinator do you use?
Connect ZBT-1
If the network is not well meshed then the link quality could be too low for the sensors to reliably stay online. Adding repeater devices (mains powered devices like bulbs) could help here.
Running six of these over three floors (2x basement, 2x main floor, 2x upstairs): https://www.amazon.com/gp/aw/d/B0DQTFM1T6
Soil sensors: https://www.amazon.com/dp/B0DH25W72N
One is within a few feet of the coordinator. I try to just not look at the network visualization as it just causes more headaches, but I have zero “green” connections… Maybe those plugs are just garbage though, IDK.