APRS telemetry

mooks

Newbie
Joined
Jun 27, 2019
Messages
2
I am using a new Argent Data OTM-3 . The telemetry reports 12.9 battery voltage. The byte value is reported as 521. The manual says that it reports in 1/10V and maximum is 20V and the byte value is 1-256. I don't understand why the value is 521 and from that how it gets a voltage of 12.9.
Telemetry also says the equation values are 0,1,0. How can it report 1/10V with an equation of 0,1,0 shouldn't it be 0,0.1,0 ?
An explanation so I can figure it out would be appreciated.
thanks
Mike VE7SML
 

mooks

Newbie
Joined
Jun 27, 2019
Messages
2
I checked the website and read the Wiki.... although it made sense for the examples they gave,
doesn't seem to work with the data I am getting.
Mike VE7SML
 

talkpair

Member
Joined
Apr 27, 2009
Messages
949
Location
Clinton County, MO
Are we sure the telemetry data contains the battery voltage?

From looking at your log, I see what appears to be voltage and temperature reported in the comment section of a position packet.

2020-02-03 06:12:48 CST: VE7SML-1>APOT30,WIDE2-1,qAR,VE7SML-4:T#055,475,100,000,000,000,00000000
2020-02-03 06:14:28 CST: VE7SML-1>APOT30,WIDE2-1,qAR,VE7SML-4:>VE7SML -1 KITCHEN TABLE DIGIPEATER
2020-02-03 06:14:28 CST: VE7SML-1>APOT30,WIDE2-1,qAR,VE7SML-4:
!
5144.87N/12429.40W# 11.9V 14C

The third line in the above log is a position packet, which is indicated with an exclamation point as the data type indicator.
 
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