ESP8266 Community Forum

- Fri May 06, 2016 1:16 pm #46996 Hi friends, i'm testing my new ESP8266 - 01 module.
I want it to run arduino code so im flashing it with Arduino IDE with blink program.
I'm having problems in flashing it, it says on the arduino log:
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed

my connections with the ESP-01:
pin RESET, CH_PD, and GPIO 2 connected to Vcc
and GPIO 0 connected to GND,
TX-RX, RX-TX.

Note:
i'm using USB-UART with CP2102 module.
i have tried supplying power of ESP01 from another source (Pi or Arduino)
but still no luck.
Can someone help me! Any kind of information is appreciated, thanks!

- Fri May 06, 2016 2:48 pm #47005 Hi

Try this

PIN 1 - GND to GND
PIN 4 - CH_PD to Vcc (3.3V)
PIN 6 - RST (solder wire to this pin and leave it floating)
PIN 8 - Vcc to Vcc
PIN 7 - Rx to Tx of TTL
PIN 2 - Tx to Rx of TTL
PIN 3 - GIPIO 2 dont connect to anything
PIN 5 - GIPIO 0 (solder wire to this pin and leave it floating)

Connect your module to USB and run flashing tool.
In flash tool select serial port.
Then PIN 6 - RST take wire and connect to ground, Then Take PIN 5- GIPIO 0 and connect to ground.
Now Remove PIN 6 - RST from ground (blue LED on esp will blink) and then remove PIN 5-GIPIO 0 from ground and your module is set to FLASHING mode

- Fri May 06, 2016 3:33 pm #47010 You get the same result my friend..

- Sun May 08, 2016 4:53 pm #47144 Hi

You need to check your serial connection first , connect the serial adapter with ESP module & open the serial monitor on Arduino IDE then power ESP module , you should see something like below :



if so , then you connected the module properly to your computer , if not please change the connection so that RX to RX & TX to TX , I faced that once & reverse the connection solve the issue , after that you need to put the module in flashing status by connecting GPIO0 to ground & reset the module be connect the reset to ground then release it , please try these steps & let us know if it work for you .

Thank you.