These are chat archives for esp8266/Arduino
*((uint32_t*) 0x40200000) == 0
@me-no-dev @igrr: Thanks to both! And sorry for the very late reply. I was extremely busy these days.
digitalRead, maybe the problem is that I have a LED between the GPIO and VCC (because the GPIO is the pin 2, and connecting normally the LED would ruin the boot).
About the raw packet capture, I'll see later. This sounds very interesting.
About the MAC address...
RF_PRE_INIT() in the C++ part, it worked perfectly!