MPU9250 magnetometer-motion sensor readings will shut off periodically

By katarinaljulj , 21 March 2016

Hello,

I am doing a wireless sensor network project in which my group has decided to put together a mesh network over ten parking spaces in an outdoor parking lot with the end goal of creating an app for users to check for available parking. We decided to go with the TI-CC-2650 sensor tag and we specifically want to use the Invensense magnetometer (MPU9250) that comes with it in order to detect the presence/absence of vehicles. While doing preliminary testing outdoors, the magnetometer would shut off after different periods of time. I thought it might have been the cold or the battery, but it is neither. I brought the sensor both into the house and placed it in my backyard and it stayed on indefinitely. The next time I tested the sensor I got the following errors on my app: "Status: Error 22" and 'Status: Error 133". Does anyone know what these errors mean or what could be the problem? I haven't been able to find any documents to help with this problem.

Thank you so much for your help,

Katarina

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