Model 21 23 - bobbybudnick/SFS-Mobile-Internet-Device GitHub Wiki

Model 21 and 23 front:

Model 21 rear:

Model 23 rear:

Model 21 and 23 are a continuation of Model 16. The Lattepanda (original) SBC is used with an improved form factor over Model 16. Speed, stability and features should all be working well.

Basic usage - Model 21
startup: screen power switch and power button on lattepanda sbc
sleep: screen power switch for automatic cpu speed control when asleep

Basic usage - Model 23
startup: power button on lattepanda sbc
sleep: screen power button and debug menu utility for manually controlling cpu speed

Comparison of Model 21 and 23 / 340 vs 313 / 5" vs 4.3"
model 21 with switch saves 400ma (1.2 - .80a)/model 23 button saves 100ma (1.3 - 1.2a)
model 21 running power is less (1.2a vs 1.3a) (may be due to increased usage of 313)
model 21 5" has better behavior for touchscreen gaming
model 21 5" is larger
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model 23 4.3" is clearer for reading text
model 23 4.3" has good view on left and right in portrait mode
model 23 4.3" does not have 9c/unresponsive screen bug
model 23 313 is more stable / does not reboot like 340