PeriPage
P21
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PeriPage P21 Printed from a web page over Bluetooth LE — no app, no server. Protocol reverse-engineered from the Android APK.
Font size
Align
Left
Center
Right
Font
Sans
Serif
Mono
Bold
Wrap long lines
Drop an image here, or click to choose
Mode
Sketch — line art, logos (best default)
Photo — dithered, for photographs
Text — hard threshold
Brightness
0
Contrast
0
Preview
Printer
—
Print
Density
normal
Copies
1
Print
Feed
Density 0–2 maps to wire 0/2/4 — the P21 saturates at 4.
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