I have found an interesting log entry, I cannot see where it is called...
Sat Jan 5 11:58:42 2019 DDEV <0002> LMSDevice.cpp:386 [tid=3070102608]
chan 0: Setting TX gain to 73 dB
Sat Jan 5 11:58:42 2019 DLMS <0003> LMSDevice.cpp:102 [tid=3021294672] L
Sat Jan 5 11:58:42 2019 DMAIN <0000> Transceiver.cpp:1039
[tid=3012840528] ClockInterface: sending IND CLOCK 920402
the message of a single L seems a little cryptic, and I have not found
it's origin......
Gullik