Zwave no_ack

Questions & Help
1

Hi All,

Out of the blue all my Zwave devices stopped responding.
They do still work if a flow turns a light on or off, but they do not respond to my input via the Homey app.
In the app I get a ‘TRANSMIT_COMPLETE_NO_ACK’ error message.
See attached screenshots:

IMG_0567
IMG_05671170×392 66.9 KB

Scherm­afbeelding 2024-10-07 om 12.12.31
Scherm­afbeelding 2024-10-07 om 12.12.31929×59 4.78 KB

Bit of logging from the developer tool:

2024-10-07T08:59:57.753Z
Command[95] end: sendData
2024-10-07T09:17:32.294Z
Node[24]: [COMMAND_CLASS_SENSOR_MULTILEVEL] {"Sensor Type (Raw)":{"type":"Buffer","data":[1]},"Sensor Type":"Temperature (version 1)","Level (Raw)":{"type":"Buffer","data":[34]},"Level":{"Size":2,"Scale":0,"Precision":1},"Sensor Value (Raw)":{"type":"Buffer","data":[0,217]},"Sensor Value":{"type":"Buffer","data":[0,217]}}
2024-10-07T10:13:23.124Z
Command[96] start: heal
2024-10-07T10:13:23.162Z
Command[96] status: heal, status: REQUEST_NEIGHBOR_UPDATE_STARTED
2024-10-07T10:13:28.386Z
Command[97] start: sendData
2024-10-07T10:13:35.238Z
[ProcessSendData]: To node: 14 with data: 0x2002 and txOptions: TRANSMIT_OPTION_ACK,TRANSMIT_OPTION_AUTO_ROUTE,TRANSMIT_OPTION_EXPLORE
2024-10-07T10:13:35.240Z
Command[96] end: heal
2024-10-07T10:13:41.554Z
[ProcessSendData]: Marked node 14 as noAckNode
2024-10-07T10:13:41.556Z
Command[97] end: sendData
2024-10-07T10:13:41.760Z
Command[98] start: isFailedNode
2024-10-07T10:13:41.766Z
Command[98] end: isFailedNode
2024-10-07T10:13:47.838Z
Command[99] start: sendData
2024-10-07T10:13:47.840Z
[ProcessSendData]: To node: 14 with data: 0x250100 and txOptions: TRANSMIT_OPTION_ACK,TRANSMIT_OPTION_AUTO_ROUTE,TRANSMIT_OPTION_EXPLORE
2024-10-07T10:13:54.110Z
[ProcessSendData]: Marked node 14 as noAckNode
2024-10-07T10:13:54.111Z
Command[99] end: sendData

Any suggestions what could have caused this to happen, and how I can fix this??

2

Same issue today, unknown route for a powered zwave device. Impossible to use from the app getting transmit_complete_no_ack and not able to heal.

As the option is not available like for Zigbee devices to repair. Anybody an idea of how to fix this? If I add the device manually again without removing it first, will it be replaced and all flows keep working out will it be recognized as a new device and have to fix all the flows?

3

During the pairing process of Z-Wave devices, they are automatically removed from the Z-Wave controller in the first step (first green check mark) and then added as a new device in the second step (second green check mark). Therefore you have to repair all flows afterwards.

Even though there is a script by @martijnpoppen that makes it much easier to repair advanced flows (link), I would like to ask you to contact Athom support first because of this issue.

4

I’ve been in contact with support about this, still without any luck.
Even after completely resetting the Z-Wave network and re-adding devices it is not working. Devices that are right next to Homey stoped working right after being added, giving me a unreachable error message.