I want to read the modbus register address of a sensor in a script. Instead of writing the integer value like:
calc_thz_ww_soll_temp:
sequence:
- service: modbus.write_register
data:
address: 1011
I would like to read it in a expression:
calc_thz_ww_soll_temp:
sequence:
- service: modbus.write_register
data:
address: {{ state_attr( 'sensor.ww_soll_temp', 'address' )| int }}
The expression returns Null. I do not know, how to use the correct naming. Can anyone help?