User Manual

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Commands
Command format
Fields <Cmd>, <RespCode> and <Len> are always 1 byte long.
<Data> can be from 0 to 255 bytes.
● Direction: MCU to F803-0049
<CMD><Len><Data>
● Direction: F803-0049 to MCU
<RespCode><Len><Data>
Note: EchoCode is an exception as it has only one byte (0x55).
List of commands
Table2 lists the command set available for standard use.
Table 2. List of commands
Code
Command
Description
01
IDN
Requests short information about F803-0049
and its firmware version.
02
Protocol Select
Select communication protocol and specify
some protocol-related parameters.
04
SendRecv
Sends data using previously selected
protocol and receives the tag response.
07
Idle
Switches the F803-0049 into TagDetect or
Hibernate state and specifies under which
condition to exit from these states.
08
RdReg
Reads wakeup flags.
0A
BaudRate
Sets UART baud rate.
55
EchoCode
Performs a serial interface echo.
Other codes
Reserved