In configuration mode it is important to enter test mode 3 before you go back to normal operation. Alternatively you may also reset the module after leaving configuration mode. You should now be able to send MBUS packets as long as you follow the guideline on how the UART packet format should be. That is you need to start the UART message with the packet length as described in the enclosed quick start.
Last Update: November 9, 2017
November 9, 2017 1636 Wireless M-Bus Q&A