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Added Note about Pullup and Pulldown resistors.

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h4rm0n1c 2015-07-16 18:02:50 +08:00 committed by Ivan Grokhotkov
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doc/README.md
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@ -247,6 +247,7 @@ ESPxx Hardware
- GPIO15 is also named MTDO
- Reset is also named RSBT or REST (adding PullUp improves the stability of the Module)
- GPIO2 is alternative TX for the boot loader mode
- **Directly connecting a pin to VCC or GND is not a substitute for a PullUp or PullDown resistor, doing this can break upload management and the serial console, instability has also been noted in some cases.**
###### ESP to Serial
![ESP to Serial](https://raw.githubusercontent.com/Links2004/Arduino/esp8266/docs/ESP_to_serial.png)