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Re: OTusb - Telemetry Format and Coefficients

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  • vk6mt
    Thanks for you patience. I have investigated further and here is my dilemma:- I have grounded all the analogue inputs, A2 to A5 (CN4 pins 3,4,5,6 and all
    Message 1 of 11 , Jan 21, 2012
      Thanks for you patience. I have investigated further and here is my dilemma:-

      I have grounded all the analogue inputs, A2 to A5 (CN4 pins 3,4,5,6 and all linked to 8)

      I power up the OTusb and this is the telemetry data I get:-
      T#000,066,162,144,000,009,00000000
      T#001,066,161,137,000,009,00000000
      T#002,066,163,115,000,009,00000000
      T#003,066,160,098,000,009,00000000
      T#004,066,161,113,000,009,00000000
      T#005,066,159,099,000,009,00000000
      (note:- it was because of these reading that I thought there was temp, supply, etc.. being outputted)

      The Voltage is reporting correctly in the comment field.
      !/_P.3l3rgk7>G/A=001080 12.8V 35C
      Every other aspect of the device is working flawlessly.

      I have erased the device and loaded new firmware, both via USB and the RS232 port.

      I have checked the inputs with a meter and there are 0 volts on the adc inputs.

      It looks like there is a problem with the device, but for the life of me, I can't figure it out.

      What are your thoughts?


      --- In tracker2@yahoogroups.com, James Ewen <ve6srv@...> wrote:
      >
      > The aaa,bbb,ccc parts of the equations definition are the same for both the OT2 and OTUSB as far as the built in voltage sense circuit. Both voltage sense circuits are identical, and thus the equation is identical for both units. The difference is that the stock OT2 has a temperature sensor on telemetry input 1, and a voltage sensor on telemetry input 2, whereas the stock OTUSB has only the voltage sensor on telemetry input 1.
      >
      > Look at the schematics for the OT2, OTUSB, and the telemetry definitions pages and you will see that this is the case.
      >
      > http://www.argentdata.com/support/opentracker-ot2m-schematic.png
      > http://wiki.argentdata.com/images/Otusb-schematic.png
      > http://wiki.argentdata.com/index.php?title=Telemetry
      >
      > James
      > VE6SRV
      >
      > Sent from my iPad
      >
      > On 2012-01-21, at 12:09 AM, "vk6mt" <vk6mt@...> wrote:
      >
      > > <mime-attachment.txt>
      >
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