Data Sheet
UART mode
Data format
Vcc
RX
Data in
Data out
TX
3.3V – 5.5V
Baud
8 data bits
1 stop bit
no parity
no ow control
300
1,200
2,400
9,600
19,200
38,400
57,600
115,200
default
0V0V
VCC
CPU
TX RX
RX TX
TX RX
Green
UART standby
Cyan
Taking reading
Purple
Changing
baud rate
White
Find
Red
Command
not understood
Data type oating point
Decimal places
Smallest string 4 characters
Largest string 16 characters
Reading D.O.
Units mg/L & (% sat)
Encoding ASCII
Format string
Terminator carriage return
when enabled
(CSV string when
% sat is enabled)
mg/L = 2
% sat = 1
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