Asset Tracker 2 with eDRX and PSM settings

We are developing a product that will use Asset Tracker 2 and Nordic's nRF Cloud.

We want to take advantage of the power saving offered by the LTE eDRX and PSM modes.  We are trying to sort out how Asset Tracker 2 sets either eDRX or PSM timer settings, and what the relationship is between those settings and the 'activeWaitTime' that is part of the device's configuration.

So, specifically, our question is:

  1. Does Asset Tracker 2 use a default eDRX or PSM setting?  Which one? What are the timer settings?
  2. How can those settings be changed?
  3. What, if any, is the relationship between whatever either the eDRX or the PSM settings are and the 'activeWaitTime' time setting that is part of the device configuration?
  4. How can we determine which setting, either eDRX or PSM that the device is currently set to?  For example, if I use the AT+CPMS? command the response is: +CPSMS: 1,,,"11000001","00001010", indicating the PSM mode is enabled, and if I use the  AT+CEDRXRDP command I get the response +CEDRXRDP: 4,"0001","0001","0001" which indicates the eDRX is enabled.  But they can't both be on at the same time on the same device.  So how do I know if eDRX is currently being used on the device or PSM?



Thanks in advance for your help!

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