Hello @aliban
I think it might be the baud rate in emonhub:
com_baud will need to be 38400 for the RFM69Pi:
[[EmonPi2]]
Type = EmonHubOEMInterfacer
[[[init_settings]]]
com_port = /dev/ttyAMA0
com_baud = 38400
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
subchannels = ToRFM12,