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CLR key is used to backspace the last key.
ESC key is used to erase all keys in the LCD and buffer.
If you have already key-in some keys and then stop key-in over 10 seconds, FAT820W will erase all keys
in LCD and buffer. And issue a timeout notice to host (refer to Paragraph
6-M
).
Host can erase LCD and buffer by Paragraph
6-C
command.
If you need reader to read barcode/magnetic stripe card, please make sure reader is enabled. If the card
data can’t be decoded, it sends an error notice to host. If the card data is correct, it sends the card data to host,
and sounds a beep.
You can get the existing information and status on FAT820W by Paragraph
6-A
command. We suggest you
may use this command to make sure the correct correspondent settings you want between host and FAT820W.
FAT820W support 2 viewing. The one is desktop viewing; and the other one is wall-mount viewing. Once
you change the viewing, the FAT820W will keep this setting and restart itself. So, please re-connect this
FAT820W on ETHERNET network. After restart, you typing key and send text message will meet your
specific viewing, but not the saved graphics message page. For the saved graphics message, we suggest you
redraw and save it again.
Setting IP address and port number of device
Setting network parameters by command, as following,
Ethernet Header(14)
IP Header(20)
UDP Header(8)
UDP command or response
CRC
After got the device IP and port, we can operation
UPD Broadcast & Networking configuration protocol
1.
UDP Port Number
The port number of transferring is
883
(Factory default value)
2.
Structure of a packet
The FAT820W devices are programmed using following command that can be sent through the
Ethernet.
About the structure of packet was defined as below:
STX
Command
Parameter
ETX
Bytes
1
1
N
1
STX:
It is fixed at 0x02. That is the signal of broadcast packet.
Command:
It is command code of the packet.
Parameter:
the data that will be execute.
ETX:
end of the packet. It is fixed at 0x03
3.
Structure of a reply packet
Device returns the reply command to host with the result information of executing the operation of
requested command. This command is sent from device to host.
About the structure of a reply packet was defined as below:
STX
ACK
Parameter
ETX
Bytes
0x02
1: ASCII
N
0x03
