Command Summary
19
Level
Byte
Trigger level as above.
1.6
Turn
Software Flow
Control On
Dec
Hex
ASCII
254 58
FE 3A
■
:
Full Empty
Full Empty
Full Empty
v8.0
Enables simple flow control. The display will return a single, Xoff, byte to the host when the display buffer is
almost full and a different, Xon, byte when the buffer is almost empty. Full value should provide enough room for
the largest data packet to be received without buffer overflow. No data should be sent to the display between full
and empty responses to permit processing. Buffer size is 128 bytes. Not available in I2C. Default off.
Full
Byte
Number of bytes remaining before buffer is completely full, 0 < Full < Empty < 128.
Empty
Byte
Number of bytes remaining before buffer can be considered empty enough to accept data.
1.7
Turn
Software Flow
Control Off
Dec
Hex
ASCII
254 59
FE 3B
■
;
v8.0
Disables flow control. Bytes sent to the display may be permitted to overflow the buffer resulting in data loss.
1.8
Set Software
Flow Control
Response
Dec
Hex
ASCII
254
Xon Xoff
60
FE
Xon Xoff
3C
■
<
Xon Xoff
v8.0
Sets the values returned for almost full and almost empty messages when in flow control mode. This command
permits the display to utilize standard flow control values of 0x11 and 0x13, note that defaults are 0xFF and 0xFE.
Xon
Byte
Value returned when display buffer is almost empty, permitting transmission to resume.
Xoff
Byte
Value returned when display buffer is almost full, signaling transmission to
halt.
1.9
Echo
Dec
Hex
ASCII
254 255
FE FF
■
Length Data
Length Data
Length Data
v8.3
Send data to the display that it will echo. Useful to confirm communication or return information from scripts.
Length
Short
Length of data array to be echoed.
Data
Byte(s)
An arbitrary array of data that the module will return.
Response
Byte(s)
The same arbitrary array of data originally sent.
1.10
Delay
Dec
Hex
ASCII
254 251
FE FB
■
√
Time
Time
Time
v8.3
Pause command execution to and responses from the display for the specified length of time.
Time
Short
Length of delay in ms, maximum 2000.
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