@trick2011 , to help you troubleshoot your problem, you can also refer to our docs here that explains eDRX: https://docs.iotcreators.com/docs/nb-iot-network-information, and also here on the official gsma website you can find infos about the edrx parameters in europe https://www.gsma.com/iot/mobile-iot/roaming/ . Also, to be able to send data to your device through eDRX, you will need to send at least one payload from the device to our platform, because the mobile network needs to know the ip address of your device in order to correctly forward the message through eDRX.
Hope this helps!
BR
Marco