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ESP8266 Pin Description
Pin | High Status | Low Status | Note |
VCC, GND | Use standalone power source, or large capacitor, all power of this module from external | ||
UTXD, URXD | The serial port | ||
RST | - | restart | |
CH_PD | Flash boot and Update Mode | - | chip enable, so always connect to high status with VCC |
GPIO0 | - | Update mode | |
GPIO2 | - | - | |
* No need any pull-up