@Sofi_g @TwistedFate Beta firmware has been sent to your devices, you may check it 30 minutes later in the Kasa app and perform the update.

@TigerTone  Beta firmware has been sent to your devices, you may check it 30 minutes later in the Kasa app and perform the update.

dom3 wrote

  @Wayne-TP I observe a similar issue of a zig zag heating pattern with a linked T315. I also observe this zig zag pattern with actually no linked external temperature sensor. Overall it looks more like those thermostats are controlled with a bang-bang controller instead of a nice pid controller.

Are there beta firmares available for KE100 ( and T315) for testing?

  @dom3 

If you have a product-related question, it’s best to create a separate post. This thread is dedicated to beta firmware access, which is distributed via private message. You’ll notice most comments here are from me, sharing firmware update notices. If other types of discussions are mixed in, I may not be able to spot them promptly.

Now, back to your question: it is normal to observe temperature fluctuations with the KE100. The product regulates temperature by adjusting the valve, which naturally introduces a response delay. For example, even when the valve is fully closed, the temperature may continue to rise briefly because residual hot water remains in the system, the heating can't just stop immediately. While our algorithm is designed to minimize the impact of this delay, other factors are also considered to ensure the product’s overall performance. For instance, although frequent valve adjustments could bring the temperature closer to your target, this would drain the battery faster and ultimately affect the device’s long-term reliability. Therefore, there are limits on how often the valve moves.

The above explanation should clarify the temperature fluctuations in KE100's control. If you have other questions, feel free to ask.