ESP8266 Community Forum

- Mon Apr 03, 2017 8:14 pm #64584 Hello Everyone,

I'm really upset cuz i'm facing a lot of troubles trying to comunicate with esp8266-12.

5 Months ago when I started an Udemy course that presented an schematic that worked really fine at the time to my old esp8266-12 .I used it to communicate with terminal programs and later with arduino IDE and upload and run programs.

Now I bought some fresh new ESP12 to program them, but i cant even comunicate with Terminal Programs like Termite / Putty anymore. (neighter esp's: the new ones and old ones)

Since from beginning i used external 3.3v supply to esp.

I searched a lot in forums without success. Can anyone help me?

Schematics im using:

VCC - 3.3v CH_PC - (R - 1kohm) - 3.3v
RST - (R - 1kohm) - 3.3V + Button to GND for reset
TXD - TXD FTDI
RXD - RXD FTDI
GPIO0 - (R - 1kohm) - 3.3V + Button to GND for prog. mode
GPIO15 - (R - 1kohm) - GND
]GND - GND

Ps: When I turn the power supply on and press the RST button, the esp LED turns ON. But when I put the FTDI to the same GND as the esp, the LED turns OFF

PS2: I'm using the COM port that the device manager identifies.

PS3: I tryed to use every baud rates I found: 9600 / 115200 / 57600/ 77400. But none has made me comunicate with the esp.

PS4: When i make the eco test to FTDI it comunicates as expected.

PS5: When the LED goes ON i can view a new wifi Network called AI-THINKER_19CCEC

here is my schematics.

I tryed with 5 esps without succes, I re-mounted the wireing over and over again and also tested all the ports and soldering continuity.

Thanks in advance!

- Tue Apr 04, 2017 12:45 pm #64606 I Changed the TX RX order.. now its running ok!

I dont know how to remove this post, it could stay here for another users issues.

tks!