nmea | author max lapshin | Data Migration library

On a small prometheus setup I've got hundreds of syslog messages in this style:

I used CuteCom tool to parse the GNSS receiver data in Ubuntu Desktop 20.04 LTS. In the case of not receiving satellite signals, it can generate normal data. But when I went outside to receive the signal, it generated some message except NMEA sentence. Like this:

I don't know what made this. Who can help me? Thanks in advance.

I have some lines of code that gather NMEA sentences from the gpsmon gpsd command line utility (spawned as a child process) and gathers some internal GPS location data from an external radio. I don't want the user to see the gpsmon output in the terminal when they run the code, so I redirect it /dev/null like so:

Here is my frankensteined code, the error arises when i'm defining gps_module on line 12. I'm attaching pico pin 4 to the SDA on the GPS, pin 5 to the SCL, ground, and power

My matrix calculation is: C=C-A*B

Here C is a symmetric matrix so I want to speed up this calculation by considering just the upper triangular and then take the opposite elelement. I used OMP and see that my implementation is slower than the normal calculation for the entire matrix C.

I also see that the calculation for C=C-AxB is slower than C=C+AxB.

My program is attached. Please advise me!

I bought a cheap USB GPS mouse and want to read the location information using a Raspberry Pi. The raw (serial) data from the GPS mouse looks like this:

When testing an app that uses the OnNmeaMessageListener on a Samsung J7 the app breaks with this error

And I really don't get what is the problem, I've tested on other devices and the app works.

Code that I'm testing:

I'm getting output from a sensor (GPS) in Python and for some reason, the output is not entirely clean. I'm already using pynmea2 and its checksum to filter out the bad rows but I want to improve the acceptance rate.

If you look at some sample data from the sensor, you see that many characters are replaced with something that could be corrected by a human, such as ® = . or ³ = 3. Some on the other hand, are less clear, such as ¶ or ± or Ç = G and not C.

I've tried to research how I could fix this but short of creating a hardcoded map or search and replace, I can't come up with anything. Is there a library or a way to "clean up" my input to solve at least the obvious one and thus boost my acceptance rate?

Here is a minimal, testable example of some code I have written to read NMEA data being provided to the UART of the RaspberryPi. I am running this with python3. I would expect the UTC timestamp to show about a 5 second delta between iterations. However, it is always 1 second.