The Arduino Mega is a useful tool for the maker. Generally, once one has come up with plans for blinking LEDs that require more IO than is available on the Arduino Uno, one graduates to the Mega ...

[Andy] didn’t want to use up 24 pins on his Arduino, so he used a latch to multiplex the lowest 8 address lines and the data lines together. With the 512KB RAM expansion installed, the Mega is ...

Upon trying I ran in to some hurdles and found the firmware version on the ESP8266 is older and doesn't support the WIFI_ESP library in Arduino. It took a while to figure everything out as I couldn't ...