But now I want to clear the configured value, so i set it to 99, like explained below
But unfortunately its not cleared.....well I don't see its clearedOT=temperature
Outside temperature - Configures the outside temperature to send to the thermostat. Allowed values are between -40.0 and +64.0, although thermostats may not display the full range. Specify a value above 64 (suggestion: 99) to clear a previously configured value.
Examples: OT=-3.5, OT=99
ps: I don't have an outside temp sensor or something (yet)