TT4 Telemetry

TT4 Telemetry

Using findu.com's message sending facility at http://www.findu.com/cgi-bin/entermsg.cgi I sent the following APRS messages from/to the unit's callsign (KJ4ERJ-7 in my case): PARM.BattVin,Temp,JP5,JP4,JP3,PC7,PC6,PC5,PC4,PC3,P2,P1,P0 UNIT.Volts,degF,Volts,Volts,Volts,on,on,on,on,on,off,off,off EQNS.0,.109,0,0,3.528,-459.4,0,.0196,0,0,.0196,0,0,.0196,0 BITS.11111000,KJ4ERJ-7 TinyTrak4 PARM sets the names of the various parameters UNIT sets the units of the various parameters EQNS sets the quadratic coefficients for the UNIT conversion BITS sets the UNIT state of the bit and names the project You may need different coefficients depending on if you're using the higher resolution settings. Mine are on low resolution and seem to track some semblance of reality (the TT4 is on a West-facing window sill in Palm Bay, Florida). You can read more about setting up telemetry at http://www.aprs.net/vm/DOS/TELEMTRY.HTM as well as in Chapter 13 of the APRS Spec from ftp://ftp.tapr.org/aprssig/aprsspec/spec/aprs101/APRS101.pdf