Due to the heat, wi-fi stopped working on RB493 and I decided to add a fan.
But after connection, the speed from the fan is not read:
After a few experiments and a reboot, I saw that the voltage line was added (which should not be, as I understand it, for the RB493 model without letters).
But it does not display voltage, it’s show something like raw fan-speed:
In normal fan operation it’s changes like 12-11V:
When I’m try to slow fan speed by my finger it’s show down voltage:
When I’m stop fan by my finger it’s show 0V:
When disconnect FAN it’s show:
I take another RB493 but can’t reproduce that and only have “0 RPM” again without “voltage” indicator:
It’s is firmware bug or my mistake? I need to read fan-speed via SNMP to control FAN failure on RB493 devices.