I am not really sure how the different servers/clients keep track of the parameters.?
? ?Best guess is that they keep what they were given, until new data comes along.?
? ?So if you send the messages once, they should be good (for all the stations who receive it).?
? ?Since you are particularly interested in aprs.fi, you will know when the information is set properly.
? ? ? Just check on the callsign >Info >Telemetry
Yes, the Telemetry message is formatted in a specific way to provide 5 analog sensors and 8 "flags" or bits.
? ? Personally, I would send the constants so that the reported values are always in volts.? That way the values are always relevant to the input.
? ? So, depending on what you have TELHIRES, the constants would be:? 5 Volts / 255 bits or 0.0196 or 5 Volts / 999 bits or .005
? ? With TELREAD TRUE (so the first 2 channels are "human Readable"),?the "non-specified" channels would be:
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |----Bat-----|-Temp--|--------JP5-------|--------JP4-------|-------JP3-------|
? ? TELHIRES FALSE:? ? ? ? :EQNS.0,0.1,0,0,1,0,0,0.0196,0,0,0.0196,0,0,0.0196,0
? ? TELHIRES TRUE:? ? ? ? ? :EQNS.0,0.1,0,0,1,0,0,0.0005,0,0,0.0005,0,0,0.0005,0
and
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?:PARM.Battery,Temp,V_J5,V_J4,V_J3
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?UNIT.Volts,Deg_F,Volts,Volts,Volts
When undefined analog inputs are reading volts, there is at least some meaning to the value.??
If, at some point later, you cannot a sensor, then the sensor parameters can easily be used to convert to engineering units.
? ?Example:? a atm pressure sensor that provides 250 mBar per volts:? when the channels reads 4 volts, the sensor is at 1000 mBar.
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Robert Giuliano
KB8RCO
