S Meter values (UART RX, from radio):
Meter values are prefixed with, guess what, 0x3D (same as the meter button, nice).
Or, alternatively in ASCII, prefixed with = and of course as usual ends in a carriage return \r
The panel doesn't do anything other than just receive the value and display it.
Valid range is 0000 to 2000 ASCII, S-Meter has a total of 20 "bars".
0100 is one bar, 0200 two bars etc, s1 is 3 bars.
Example
CMD Signal Level Carriage Return
0x3D 0x30 0x38 0x30 x30 0x0D
In ASCII:
= 0800 \r
SWR meter values are the last digit in =0000 where the digit represents the amount of bars lit for the SWR meter.
Valid range is =0001 to =0010
Please see S-Meter picture above for reference.
S0 signal to S9 signal:
S-Level ASCII Values
S0 -> 0000 .. 0200 (range)?
S1 -> 0100 .. 0300 (range)?
S2 -> 0400
S3 -> 0500
S4 -> 0600
S5 -> 0700
S6 -> 0800
S7 -> 0900
S8 -> 1000
S9 -> 1100
S9 +10dB -> 1200
S9 +20dB -> 1300
S9 +25dB -> 1400
S9 +30dB -> 1500
S9 +40dB -> 1600
S9 +45dB -> 1700
S9 +50dB -> 1800
S9 +55dB -> 1900
S9 +60dB -> 2000
SWR Meter:
Valid range =2F01..=2FFF
VFO A/B: ;1572910 <-- VFO A Frequency =0000 D⸮ E⸮ ;1527000 <-- VFO B Frequency =0000 D⸮ E⸮ ⸮