If you are not familiar with cellular IoT fundamentals and low-power concepts, first complete the Cellular IoT Fundamentals course in the Nordic Developer Academy. The course covers the following essential topics:
- The basics of the LTE-M and NB-IoT network technologies.
- The power saving modes, which are power saving mode (PSM) and extended discontinuous reception (eDRX).
It is also recommended to read the Best Practices for Cellular Development documentation.