RichardS wrote:You can use 12,13,14,16,4,5,0,2,15
Make sure 15 is low at reset and 0,2 are high, then it will be OK.
Also make sure 16 is not connected to reset as it is in some modules, this is used to deep sleep wakeup.
RichardS
I'm sorry, I dont quite understand "at reset" as you explain. So you mean I must measure pin 15 is low, 0 & 2 is high when restart (unplug power source and replug)?