Hej!
Vilken/vilka strömsensor är det du vill lägga till?
Kan du visa med screenshot vad felmeddelandet blir?
Fasströms-sensorerna har annonserats för HA med t.ex. (för enhet 80aa1879cf58)
homeassistant/sensor/I3_80aa1879cf58/config {"uniq_id":"I3_80aa1879cf58","obj_id":"I3_80aa1879cf58","name":"Currently I3","dev_cla":"current","stat_t":"currently/one/80aa1879cf58/state","unit_of_meas":"A","val_tpl":"{{value_json.I3}}"}
homeassistant/sensor/I2_80aa1879cf58/config {"uniq_id":"I2_80aa1879cf58","obj_id":"I2_80aa1879cf58","name":"Currently I2","dev_cla":"current","stat_t":"currently/one/80aa1879cf58/state","unit_of_meas":"A","val_tpl":"{{value_json.I2}}"}
homeassistant/sensor/I1_80aa1879cf58/config {"uniq_id":"I1_80aa1879cf58","obj_id":"I1_80aa1879cf58","name":"Currently I1","dev_cla":"current","stat_t":"currently/one/80aa1879cf58/state","unit_of_meas":"A","val_tpl":"{{value_json.I1}}"}
se MQTT protocol / API
och även Sensors and Devices in streamed data