correct wiring and pullups
Posted: Wed Jul 22, 2015 12:12 pmI had read an articles and forums about correct wiring, but then has read "ESP8266 Datasheet - Module Application Design Guide - 20.08.2014 English" and confused. According to the last document: "Work mode: GPIO0, GPIO2 and U0TXD should be kept high when powering on the chip. If it is not used, it could be left floating (it has internal pull-up)". Those if I understand correctly, then ESP8266 already have pull-up resistors inside and outside is not necessary to install pull-up resistors outside of ESP. Or I do not understand correctly this phrase?