@fosi Nice work. Each message needs to have a different child id. Do something similar to this: MyMessage msgBmeIAQ(CHILD_ID_AQ, V_VAR1); MyMessage msgBmeGas(CHILD_ID_GAS, V_VAR2); MyMessage msgBmeIAQA(CHILD_ID_AQA, V_VAR3); and define them as different numbers.