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Commands
1. Communications
1.1.Changing the I2C Dec
254 51 Address
Slave Address
Hex
ASCII
FE 33 Address
■ 3 Address
Immediately changes the I 2 C write address.
Address 1 byte, even value
1.2.Changing the Dec
254 57 Speed
Baud Rate
Hex
ASCII
FE 39 Speed
■ 9 Speed
Immediately changes the baud rate. Can be temporarily forced to 19200 with manual override.
Speed 1 byte, valid settings shown below
Rate
Speed
1200
83
2400
41
4800
207
9600
103
19200
51
28800
34
38400
25
57600
16
1.3.Setting a Non- Dec
Standard Baud Rate Hex
254 164 Speed
FE A4 Speed
Immediately changes the baud rate to a non-standard value. Range is 977 to 153800. Speed must be a whole number.
Due to rounding, error increases with baud rate, actual baud must be within 3% of desired baud to ensure accurate
communication. Baud rate can be temporarily forced to 19200 by a manual override.
Speed 2 byte, calculations shown below
Speed =
CrystalSpeed
 8 × DesiredBaud 
? 1
ActualBaud =
CrystalSpeed
 8 × Speed  1  
 0.03
∣ DesiredBaud ? ActualBaud ∣
DesiredBaud
1.4.Transmission
Dec
254 160 Protocol
Protocol Select Hex
FE A0 Protocol
Selects the protocol used for data transmission to the host. Data transmission from the host is not affected. Must be set
to the protocol in use to receive data correctly.
Protocol 1 byte, 1 for Serial (RS232/TTL/USB) or 0 for I 2 C
17
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