ESP8266 Community Forum

- Tue Nov 17, 2015 3:43 pm #34330 Yes, I have everything set up as described here http://www.electrodragon.com/w/Category:ESP8266_Basic_Usage#Module_Pin_Description

When I try to flash it, XTCOM_UTIL opens the port successfully, but does take a bit of a time to connect ( around 100, sometimes more). However, when I go and try to download the .bin files, I get an error.

- Tue Nov 17, 2015 3:46 pm #34331 Try some other boot loader tools, such esptool.py
Check your power supply voltage and rating.
Do you have big decoupling capacitor such 220uF or 470uF on ESP power pins ?
What kind of USB-TTL are you using ?

- Tue Nov 17, 2015 3:58 pm #34333

Try some other boot loader tools, such esptool.py
Check your power supply voltage and rating.
Do you have big decoupling capacitor such 220uF or 470uF on ESP power pins ?
What kind of USB-TTL are you using ?

No I don't have any capacitors between ESP power pins.
And I'm using arduino to connect my ESP to my PC. Can this pose any problems?

- Tue Nov 17, 2015 5:08 pm #34340

No I don't have any capacitors between ESP power pins.
And I'm using arduino to connect my ESP to my PC. Can this pose any problems?

Please, add a capacitor of 220uF or 470uF between ESP power pins, it will fix many issues.
You can use Arduino as USB-TTL, as long as the sketch running don't interfere with the Serial between PC and ESP, but make sure you have a voltage divider on the TX, since the RX of ESP is 3.3V and not tolerant to the 5V of Arduino.
Also, how do you power the ESP ? Because the 3.3V output of Arduino is NOT capable enough to provide required current of the ESP.