undervoltage issue?

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That's great news that you got it working well!

Voltage Indicator Question:  
Well, that's a solid "kinda."  As far as I know, you can measure the core voltage, but you can't measure the 5V or 3.3V.  

If you're ssh'd in, do

Code:

for id in core sdram_c sdram_i sdram_p ; do     sudo echo -e "$id:\t$(vcgencmd measure_volts $id)" ; done

It will print something like

Code:

core: volt=1.2000V
sdram_c: volt=1.2000V
sdram_i: volt=1.2000V
sdram_p: volt=1.2250V

What you mentioned with pin35 is likely something someone wrote that would interface with some external voltage ADC hardware.

WiFi Disable Question:
Please see http://forum.freeplaytech.com/showthread...475&page=4