ESP8266 Community Forum

- Sun Feb 01, 2015 12:53 pm #8708

I've seen it but still having doubts...

Would it be like this to upload firmware?

1. CH_PD to VCC
2. GPIO02 to VCC
3. GPIO00 to GND
4. GPIO15 to GND
5. URXD to TX (USB to serial adapter)
6. UTXD to RX (USB to serial adapter)

And what about for "normal" use?

Remove the gpio2 connecting to vcc, you dont need to do that, but everything else is right. FYI make sure you serial adapter is on 3.3v mode or you have to make voltage devider to cut 5v tx pin to 3.3v. Other solution is use 3.3v zener diod with a resistor to cap the voltage to 3.3v. good luck

- Sun Feb 01, 2015 12:57 pm #8709 GPIO0 needs to be connected to GND at the power up inorder to put the chip on bootloader mode so you can up load the firmware but after you done with the firmware uploading, remove GPIO0 from the GND. This should be your normal operation. Everything else should be connected as you mentioned above