Checking data for integrity

A project log for GPS + IMU Wio Terminal Logger

This gadget will record GPS and IMU data at 50 Hz onto an SD card for further processing on a PC.

Tegwyn☠TwmffatTegwyn☠Twmffat 11/16/2021 at 18:230 Comments
The image below is a screenshot of a portion of the IMU data captured at 100 Hz. A and B show areas where there seems to be data loss when the system writes to the SD card. The bottom axis is milli-seconds and data seems to be being written once every second or so, with about a 200 milli-second loss each time. There will be some kind of compromise between  data output frequency and the amount of data outputted and some optimisation will probably be made by 1. Upgrading the SD card and 2. Doing some onboard averaging to reduce the amount of data getting written to SD.