For my internship I'm working with the SARA R410M module, whilst testing I've encoutered some contradicting data.
I'm using a Vodafone SIM card connected to the NB-IOT network. (here are my settings: https://imgur.com/0gIkHXK)
I've loaded the Sodaq-saraR4-maker software using Arduino.
I'm working on a project with in which battery life is very important. So I wanted to check how long it took for the module to connect. I noticed some strange patterns in which it would sometimes connect faster indoors compared to outdoors. After that I started checking signal strength using the AT command: AT+CSQ. The results of which can be found below.
One would expect that the time to connect would decrease as signal strength grows. Yet it appears to be random. I'm pretty sure these measurements are correct. I've done multiple tests on these locations and the times to connect were within seconds of eachother. So I suspect there to be another factor that affects the time to connect, yet I have no clue what.
Are there any of you that have encoutered a similar Issue?