Device commands not working after firmware update to 61.6

Devices & Integrations
1

Subject: Zigbee Thermostat driver (SmartThings) — setpoint commands silently fail after recent update

Devices: 2x Zen-01 thermostats (Zen Within), paired via SmartThings Hub, using the stock “Zigbee Thermostat” driver (version 2026-06-29T15:14:08)

Issue: Both thermostats report status correctly (temperature updates in real time), but setpoint changes made via the app slider do not take effect. The slider shows the new value temporarily, then reverts to the original setpoint when the app is closed and reopened. This happens on both devices identically.

Troubleshooting already completed:

**•**	Confirmed hub is online and sending commands successfully to other Zigbee devices (front door lock works normally)

**•**	Confirmed both thermostats are correctly recognized with full Thermostat capability (not generic Zigbee fallback)

**•**	Ruled out mesh/range issue — same failure on both devices in different rooms

**•**	Ruled out app UI bug — tested via device card slider; same result

Suspected cause: Timing aligns with the 0.61.6 hub firmware rollout (June 15–26, 2026) and a driver update to “Zigbee Thermostat” dated June 29, 2026. Suspect a regression in the setpoint write path introduced during this rollout.

Request: Please investigate whether this driver version has a known issue with setpoint command handling, and advise on a fix or rollback timeline. Happy to enable Account Data Access for support if needed.

2

Hi, @Emmer44
Can you check if you can listen to driver logs to see if an error is shown there?

  1. You need to set up the ST CLI and run the command below:
smartthings edge:drivers:logcat
  1. The CLI will prompt you to select from which hub and driver you want to listen to events
  2. Then, send commands to the devices so they get registered there
  3. Copy those logs into a file and share it with us. You can send it to build@smartthings.com.