Some users experience difficulties using one of the Over-the-air (OTA) methods for firmware upgrade. We propose a...
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Pow-U and power saving
We wanted to avoid the hassle of an external power supply, which is why the Pow-U is designed to run from the power that can be tapped from the HAN-signal line. To achieve this with an ESP32 microcontroller module, special measures are taken both in hardware and firmware.
But the Wifi environment where the unit is connected sometimes creates additional challenges - which is why an adjustment of the firmware power saving mode is implemented in the firmware, starting from v2.1.12.
In menu Configuration -> Wifi you will find:
Recommended setting:
- Pow-P1: Off
- Pow-K+: Minimum
- Pow-U: This is the tricky one!
Try first with "Minimum". If the device looses voltage, provoking regular reboots: Change it to "Maximum".
The disadvantage with running on "Maximum" is that the user interface will tend to be a bit less responsive. Transmission to MQTT will probably not be impacted, only user interface responsiveness.
Note:
- The Power saving function does not work on ESP8266, so will have no effect on "old" Pow-U units with that micro controller.
- The browser user interface does a "polling" to the device, requesting it to send new data each 5 seconds. If you have multiple user interface windows open and active (for instance on multiple devices: PC, phone, pad, ...) that means many more polls, and increased power consumption that can pull the voltage down so much that the device reboots regularly.
Golden rule for Pow-U users: Close the browser interface when you are not using it!
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