Campbell Scientific CS475, CS476, and CS477 Radar Water Level Sensor - Manual (Page 49)

Appendix B. SDI-12 Commands/Changing Settings
8. To change the SDI-12 address, enter the command aAb!; where a is the
current address from the above step and b is the new address. The sensor
will change its address and the datalogger will exit the SDI-12 Transparent
Mode.
9. Activate the SDI-12 Transparent Mode on Control Port 1 again by entering
*8#1 <enter>. Verify the new SDI-12 address by entering the ?! command.
The sensor will respond with the new address.
10. To exit the SDI-12 Transparent Mode, type in *0.
FIGURE B-5. SDI-12 transparent mode on CR10X-PB table-based
datalogger using control port 1 and changing SDI-12 address from
0 to 1
B-11