ESP8266 Community Forum

Hi all.
I'm trying to power up my new ESP-12 with a stable 3.3v power supply as suggested because USB may not supply the mA needed.
I'm using the Ywrobot Power mb2 (http://www.petervis.com/Raspberry_PI/Br ... upply.html)
To the communication I'm using a FTDI232 Serial adapter.

If I dont use the external power supply and connect the ESP to the FTDI It works OK without problems.
If I use the Power supply I get tons of this:
\0xfe\0xfe\0x00\0x00\0x00\0x00\0x81\0xff\0xff\0x00\0xc0\0x00\0x00\0x00\0xff\0xf0\0x00\0x00\0x00\0x00\0x80\0x00\0x00\0x00\0xfe\0x00\0x00\0x00\0x00\0x00\0xfc\0xfc\0xfc\0xe7\0x00\0x00\0x00\0x00\0x00\0x9e\0xc7\0xf8\0xc0\0x00\0x00\0x00\0x00\0xff\0x80\0xff\0xf8\0x00\0x00\0x00\0xff\0x00\0x00\0x00\0x80\0xfc\0x00\0x80\0x80\0x00\0x00\0x00\0x00\0x00\0x80\0xff\0xff\0xfc\0xfc\0x00\0x000\0xfc\0xff\0x00\0x00\0x00\0xff\0xfc\0x00\0x00\0x00\0x80\0x00\0x00\0xfc\0x00\0x08\0xfc\0xfc\0x80\0x00\0x00\0x00\0x00\0xf8\0xc0\0xf8\0x00\0x00\0x00\0xff\0xfe\0x00\0x00\0x00\0xff\0x08

The connections:
Using a 7.5V/2.4A from an old scanner to connect Ywrobot:
P Supply --> ESP12
+ --> VCC
- --> GND

FTDI --> ESP12
TX --> RX
RX --> TX

Thanks for any help

You need a common ground.
Connect the FTDI's GND pin to the ESP's GND.

lethe wrote:You need a common ground.
Connect the FTDI's GND pin to the ESP's GND.

right

SOLVED
Thank you very much for your replies.