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By BitBanger
#5831
jankop wrote:Because the internal pullup resistors can be switched off by sw, in my opinion should connect to external resistors also RST and GPIO0



This is a late reply but I never saw anyone pick up on he way you implemented this suggestion. It looks like you connected a single resitor between RST and GPIO0. The term "Pullup Resistor" is used to denote a resistor connected from an I/O pin to Vcc (or Vdd) in this case. So, rather than connecting a single resistor between RST and GPIO0 you should actually have placed one resistor from RST to Vdd and a second resistor from GPIO0 to Vdd.