@mfalkvidd yes, it is very strange. Before to write here I try to change the child id - first the sensors have id 50 and 51. After I try with 30, 31 and 31,32 but the same result - domoticz see just one of the flow meters. I try to reprogram GW and new node (clear both EEPROM) - note get new ID and the rusult are the same. Clear Domoticz database - same. Very strange for me. All other work well - have attached RFXTRX433 with energy monitor and some switches at 433Mhz, some nodes with light sensors and ds18b20 for testing.