RS232 Protocol

3
Section 2: Feedback String Format
Standard Response String Format
Start Count ID Type Data Checksum
0xFE 0x12 0x21 0x20 Flag1 … Flag5 Char1 … Char11 0xXX
The feedback string is a representation of the display of the unit.
The Flag1 – Flag5 data bytes contain data on which of the various icons on the front
display are currently illuminated.
The Char1 - Char11 data bytes contain ASCII data representing the text that appears
across the front display. It can contain current frequency information, as well as RDS
radio text data and should be parsed to obtain this information.
Flag1 – Flag5 Data
Flag1 Flag2 Flag3 Flag4 Flag5
Bit0 Narrow RDS AM Signal Bar 2
Bit1 Tuned RBDS Signal Bar 9 Signal Bar 1
Bit2 Stereo A Signal Bar 8 Signal Bar 0
Bit3 AF B Signal Bar 7
Bit4 Preset TA Ant Signal Bar 6
Bit5 Memory TP FM Signal Bar 5
Bit6 Auto EON MW Signal Bar 4
Bit7 Local RT LW Signal Bar 3