[Wireless M-Bus] regarding the M-Bus packet frame, there are two fields named C-field and CI-field, for which I could not find explanation from Radio Crafts M-Bus user manual. Please send us the details of the documents explaining C and CI fields.

“In order to understand the details about the packet format to be OMS and wireless MBUS complient using the MBUS3 modules you need the OMS specification.

http://www.oms-group.org/en_downloads.html

This specification informs about the C and CI field and also gives you some packet format exsamples in the appendix.
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Last Update: September 14, 2017