uMP3 Settings Table

Communication Settings

SettingNameValueDescription (default)
DBaud/Bit Rate09600 bps
  119200 bps
  238400 bps
  357600 bps
  4115200 bps
  52400 bps
  64800 bps
  7230400 bps
  8460800 bps
PPrompt Character1 to 25462 (‘>’)
RResponse Delay0 to 254Time in 10 ms increments (e.g. 5 = 50 ms)
0 = No response delay (immediate response)

Non-volatile Playback Settings

SettingNameValueDescription (default)
VStart-up Playback Volume0 to 254Volume setting (in -0.5 dB increments) for when the unit powers up. Default is 16 (i.e. -8 dB)
ORepeat/Loop Count0 to 2540 = Infinite loop (until interrupted or stopped)
   1 = Single
   2 to 254 = number of loops to play
BTreble/Bass Boost0 to 65535See Boost

File System Settings

SettingNameValueDescription (default)
CCopy Progress Style0none
  1progress hash “#” every 2048 bytes
  2total bytes copied & copy rate
  3progress hash, bytes copied & copy rate
ERead/Write Line Terminator0CR
  1LF
  2CRLF
TWrite Time-out0 to 254Time in 10 ms increments (e.g. 20 = 200 ms)
0 = No time-out (waits indefinitely)
LDirectory Listing Style0old style
  1new style

Input/Output Interface Settings

SettingNameValueDescription (default)
SInput Style0Input ignored
  18 Button/Switch Input
  27 Bit plus Trigger Input
HHardware Busy Indicator0 or 1“D” pin becomes a hardware busy logic output (high = playing)
NInput File Number Offset0 to 9872Numbering offset for Input files
UInput Non-stop Control8 bit maskIn 8 Button/Switch mode, this 8 bit mask indicates which buttons will be considered non-stop (a 1 in the mask indicates non-stop). In 7 Bit mode, anything > 0 will indicate non-stop playback.
AInput Polarity Control8 bit maskUsed only in 8 Button/Switch mode, this 8 bit mask indicates the polarity of input for each individual input pin (a 1 in the mask indicates positive edge triggering).
MSwitch Input Debounce Mode0 or 1Used only in 8 Button/Switch mode, this setting will turn on a simple 40 ms debounce algorithm for the inputs