[TangerineSDR] Magnetometer current state

Scotty Cowling scotty at tonks.com
Mon Oct 21 19:01:40 EDT 2019

Great progress, Dave!

Nathaniel, will this be usable by the Magnetometer testing volunteers 
that you have lined up? It seems that if remote users can acquire the 
data via a websocket connection, we have enough connectivity for a 
beginning array of a (few) dozen or so. How much security can we skip 
over just to get some testing done?

Scotty WA2DFI

On 2019-10-21 14:03, David Witten via TangerineSDR wrote:
> All,
> My current work with the magnetometer module has reached this state:
>   * I am reliably able to collect data from the magnetometer module
>     for extended periods of time using C.
>   * I still have not validated the conversion of the raw X, Y, and Z
>     values to meaningful units such as nano Tesla. They react somewhat
>     rationally to my manipulation of the device, so I have been
>     working on other concerns.
>   * Python would probably work as well, but I am less comfortable with
>     bit twiddling in script languages than in good, old C, so I have
>     left that for later.
>   * I am able to pipe the output to a processor daemon that is in Go
>     called websocketd that serves a user (local or remote)  a
>     webpage and opens a websocket connection.
>   * I then have been able to pass JSON-wrapped data packets to a
>     browser running locally on the Odroid N2 and two seperate remote
>     clients, all simultaneously for 48 hours without interruption.
>   * The webpage (served by the Go daemon presents the data in any way
>     desired using standard HTML5/JS/CSS.
> I am having less success so far using the I2C extenders, but I am 
> confident this is mostly me blundering among amongst the options.  
> This work continues.
> Dave Witten, KD0EAG

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