@Andre-Rodenburg Leuke resultaten! Ik werk met Felix

I prefer to switch to English. The first return of CSQ is in the range 0-31 and 99:
The range is the following:
0: -113 dBm or less
1: -111 dBm
2…30: from -109 to -53 dBm with 2 dBm steps
31: -51 dBm or greater
99: not known or not detectable or currently not available

Source: https://github.com/SodaqMoja/Sodaq_nbIOT/blob/master/src/Sodaq_nbIOT.cpp

I hope it helps.

PS: I like the way Cartodb paints the results. I was not aware of this web service. Thanks!