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Test review and fix of the "MOES ZigBee Smart Sprinkler Water Timer with 1 Outlet"
Technical specifications:
Model: ZWW-YC
Wireless Connection: Zigbee
Working Water Pressure: 2.9-116 Psi
Working Temperature: 40.1°F-113°F (4.5°C-45°C)
Waterproof: IP55
Battery: 2x1.5V AA alkaline batteries
I bought this thing in August 2024 so this is basically a 6 month review.
Right from the start I did not like it... It refused to pair into home assistant many times and was driving me insane. Finally I managed to get it into home assistant through z2M but it has a default timeout of 10 minutes so when you turn it on it switches off after 10 minutes. Of course in home assistant you can simply write a script to turn it back on every time it switches off and the timer is not finished but it's still annoying. More of an issue was the constant dropouts... Every couple of days it would lose connection and if I restarted the zigbee coordinator it was game over, would not reconnect no matter what. I'd had enough so I pulled it apart.
The build on the inside is mechanically very nice, fits together great and well sealed. We can see it uses the Tuya ZTU Zigbee module, and a quick look at the datasheet gave me a clue as to the cause of my problems.
Well given that I only use rechargeable NiMH batteries which maximum charge voltage is 1.4v, and even so a normal alkaline cell is 90% full at 1.4v I'd say this is a pretty major design flaw. 2 AA cells at full charge off the charger would sometimes get it to pair with the zigbee coordinator but sometimes not, the button would work sometimes, sometimes not. It was like the chip was half turning on in some failed startup mode. So I hooked it up to my adjustable power supply and did some testing. As soon as I gave it stable 2.9v or higher it was fine, paired fast and no dropouts. If I then brought it down to 2.6-2.7v it would drop off the network.
Since it was in my hand and a different one of aliexpress was weeks away I went down the fix route, one 18650 cell, a HT7333 3.3V voltage regulator from the junk bin, and a type-c USB 5V 1A 18650 TP4056 Lithium Battery Charger Module I had laying around, and I added a switch later when I realized it might be nice to be able to reboot it. Here's the result.
With a bit of silicone to hold the charger board in place it all fit in the case nicely and the battery holder was cut down so it's just a plug.
It's been rock solid on my network for the last 2 months and even the loss of the battery percentage reporting is not actually a loss as it always showed 0% even when fresh alkaline cells were in it.
Maybe mine was just a dud, manufacturing tolerances and what not meaning it had a higher minimum voltage but either way I would stay away from this one. I subsequently bought the GIEXPERIENCE GX02-EU which has been flawless with none of the annoying quirks and more features exposed to home assistant.
Technical specifications:
Model: ZWW-YC
Wireless Connection: Zigbee
Working Water Pressure: 2.9-116 Psi
Working Temperature: 40.1°F-113°F (4.5°C-45°C)
Waterproof: IP55
Battery: 2x1.5V AA alkaline batteries
I bought this thing in August 2024 so this is basically a 6 month review.
Right from the start I did not like it... It refused to pair into home assistant many times and was driving me insane. Finally I managed to get it into home assistant through z2M but it has a default timeout of 10 minutes so when you turn it on it switches off after 10 minutes. Of course in home assistant you can simply write a script to turn it back on every time it switches off and the timer is not finished but it's still annoying. More of an issue was the constant dropouts... Every couple of days it would lose connection and if I restarted the zigbee coordinator it was game over, would not reconnect no matter what. I'd had enough so I pulled it apart.
The build on the inside is mechanically very nice, fits together great and well sealed. We can see it uses the Tuya ZTU Zigbee module, and a quick look at the datasheet gave me a clue as to the cause of my problems.
Well given that I only use rechargeable NiMH batteries which maximum charge voltage is 1.4v, and even so a normal alkaline cell is 90% full at 1.4v I'd say this is a pretty major design flaw. 2 AA cells at full charge off the charger would sometimes get it to pair with the zigbee coordinator but sometimes not, the button would work sometimes, sometimes not. It was like the chip was half turning on in some failed startup mode. So I hooked it up to my adjustable power supply and did some testing. As soon as I gave it stable 2.9v or higher it was fine, paired fast and no dropouts. If I then brought it down to 2.6-2.7v it would drop off the network.
Since it was in my hand and a different one of aliexpress was weeks away I went down the fix route, one 18650 cell, a HT7333 3.3V voltage regulator from the junk bin, and a type-c USB 5V 1A 18650 TP4056 Lithium Battery Charger Module I had laying around, and I added a switch later when I realized it might be nice to be able to reboot it. Here's the result.
With a bit of silicone to hold the charger board in place it all fit in the case nicely and the battery holder was cut down so it's just a plug.
It's been rock solid on my network for the last 2 months and even the loss of the battery percentage reporting is not actually a loss as it always showed 0% even when fresh alkaline cells were in it.
Maybe mine was just a dud, manufacturing tolerances and what not meaning it had a higher minimum voltage but either way I would stay away from this one. I subsequently bought the GIEXPERIENCE GX02-EU which has been flawless with none of the annoying quirks and more features exposed to home assistant.
Cool? Ranking DIY
