to makomk: No first-hand experience, but entotheteeth on reddit, says that 5v data on the I/O will kill your device in this thread: https://www.reddit.com/r/esp

to makomk: No first-hand experience, but entotheteeth on reddit, says that 5v data on the I/O will kill your device in this thread: https://www.reddit.com/r/esp8266/comments/3bm061/5v_board_with_esp8266_or_a_board_i_can_plug_in/ https://www.reddit.com/r/esp8266/comments/3bm061/5v_board_wi...