Specifications

Table Of Contents
Serial port intercommunication agreement | VI-88TR development handbook
F0H 02H 04H 0AH
Command format with reader address:
Command code: 04H
Parameter of reader address: address
Command parameter: 1 byte of P expresses power value 20~33.
Command packet: 40H 04H 04H address P CheckSum
Return data: if command execution correct, return data is null.
F0H 03H 04H address CheckSum
2.2.6 Set Frequency
Function: to set the frequency channel number for reader to transmit
microwave signal. It takes effect immediately when operation frequency is
set ready, and will keep same till reset, no matter power supply is off or not.
Command code: 05H
Command parameter: 2 bytes, byte1 expresses start frequency fmin, value
1~59; byte2 expresses end frequency fmax, value 0~59. If fmax>fmin,
reader works by FHSS, range is fminfmax. If fmax=fmin, reader works in
fixed frequency, frequency is fmax. Note: its linked with countries’
frequency.
Command packet: 40H 04H 05H fmin fmax CheckSum
Return data: if command execution correct, return data is null.
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