I am using the TELIT SE868SY-D GPS module and extracting speed and altitude data from the RMC packet. While my device is in a static condition, the speed typically shows 0 km/h. However, occasionally, for 4-5 packets in a day, it shows a speed of 30-40 km/h.
Similarly, the altitude generally ranges between 240-260 meters, but at times, it starts showing incorrect values like -10, -100, and so on.
If anyone has a solution to address these issues, kindly let me know.
Thank you!