sensor output

[Nasser]

my GP9 output is not like the one in the video tutorial. I set up the serial port baud rate 115200 using PutTYY. I can see the ‘s’ ‘n’ ‘p’ and random characters and numbers with big gaps. the data transmitting is continuous. I wrote a c code trying to configure’ the x000 register to stop the auto transmitting but couldn’t capture any confirmation packet. The data showing by PuTTY are matching the data captured using debug mode in my IDE. any suggestion. Thank you

[CalebModerator]

The GP9 uses a binary communication protocol, so you shouldn’t expect to be able to interpret the data visually in a serial terminal. Use the CHR Serial Interface to connect to the sensor and read the data:

• This reply was modified 6 months ago by  Caleb.

[Nasser]

I need to use the data to feed my controller. so I am trying to make the sensor send a packet of date when I need it. How can I stop the streaming and how I configure the x000 register using CHR serial interface.

[CalebModerator]

Register address 0x00 is not used to disable transmission of data from the GP9. The datasheet describes register contents: http://www.chrobotics.com/docs/GP9Datasheet.pdf

To disable transmission of packets, broadcast rates for all types of packets should be set to 0. The rates are stored in registers COM_RATES1…COM_RATES7 (0x01 - 0x07).

[don]

Is it possible to have the GP9 output NMEA sentences?

[CalebModerator]

NMEA support will be added in the next GP9 firmware release.

[Dan Seely]

… here’s another vote for NMEA support …

[Author]

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