libuarte and buffer ?

RE: libuarte and buffer ?

Jørgen Holmefjord — Wed, 10 Feb 2021 11:17:39 GMT

Unfortunately, I'm not familiar with the GPS you are using or how it is working. I would recommend you to check with the manufacturer about the antenna and signal levels for that.

RE: libuarte and buffer ?

RixtronixLAB — Mon, 08 Feb 2021 22:30:16 GMT

Hi Jorgen,

Thanks for the reply,

I found it, because of memset = 0 at the end of the loop, and zeroing all my buffer,

When my gps is locked, why is GPGGA gone ? before it's locked, GPGGA available, is it because of my antenna ?

or my buffer ? I give 256 for my gps buffer, how big do you reckon ?

I used 1024 for gps buffer before.

it takes a long time for my gps getting locked, is the signal strength too weak ? I used a small square antenna indoor.

I'll make a video shot so you can see it,

Before GPS locked,

https://youtu.be/0AsNVxWhGWQ

Thanks

RE: libuarte and buffer ?

Jørgen Holmefjord — Mon, 08 Feb 2021 16:38:48 GMT

Hi,

Where do you pass rxBuffer to GPSNeo_Process? Where/how is GPS declared? I can only see GPS_t defined in the code snippets.

[quote user=""]Is it because of my Systick not yet running properly ?[/quote]

SysTick is an ARM System Timer in the CPU, mainly used for RTOS implementations. This has nothing to do with your application variables/objects.

Best regards,
Jørgen