Specifications

The Extended Address commands use a two-character ASCII address,
each character may be one of 122 legal possibilities. Illegal characters
are: NULL ($00), CR ($0D), $ ($24), # ($23), { ($7B), and } ($7E).
Command examples with Extended Address '01':
Command: {01WE
Response: *
Command: }01WE
Response: *01WE27
Command: {01RS
Response: *31070000 (typical)
Command: }01RS
Response: *01RS31070000BB (typical)
Checksums may be appended to commands:
Command: {01WE78
Response: *
All commands that are available with single-byte addressing may be
accessed with Extended Addressing, and vice-versa.