ESP8266 Community Forum

- Wed Apr 08, 2015 7:30 am #13860 Hello! I bought 5 ESP8266-201 recently and I can't get any of them to work. I wire them up like this:



But as soon as I connect the white wire to 3v3, the ESP's serial LED (the blue one) flashes and the chip starts to heat up. Can anyone help with this?

- Wed Apr 08, 2015 10:24 am #13878 I have the same board and use the following connections:
GPIO0 -> GND (only when flashing)
GPIO15 -> GND
CH_PD -> VCC (I am using a 1K resistor here)
VCC -> 3.3v
GND-> GND
RX -> TX (USB converter, Arduino, etc.)
TX ->RX (USB converter, Arduino, etc.)

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- Wed Apr 08, 2015 12:56 pm #13888 I also use the same module to play, and it works fine.
My connection is as described by bruster999, without any resistor.
But I am using fake ftdi module.

What you should chek is :
1) are the voltage levels of your serial adapter really 3,3 V ?
2) try to not connect also power from serial adapter, it should not be necessary when you power from breadboard power adapter pcb
3) my breadboard has some contacts really poor, you can measure even 40 omh at some holes, maybe you have too big voltage drop there
4) try to remove all unneeded connections, and leave only power + esp connected directly to each other

- Wed Apr 08, 2015 1:02 pm #13889 I was having stability issues with my 201 since yesterday. When Lua was installed I couldn't get the module to respond. It would respond when an AT firmware was installed but not Lua. I read somewhere that RST should be tied HIGH with a resistor (1K-10K, 4.7K being the most common) so I tried that using 1K. Low and behold the module started responding again.

So, my new pinout recommendation is:
GPIO0 -> GND (only when flashing)
GPIO15 -> GND
RST -> VCC (I am using a 1K resistor here)
CH_PD -> VCC (I am using a 1K resistor here)
VCC -> 3.3v
GND-> GND
RX -> TX (USB converter, Arduino, etc.)
TX ->RX (USB converter, Arduino, etc.)