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I am working on esp8266 with Arduino.

I have connected pins like arduino-esp 3.3-vcc gnd-gnd 3.3-CH_PD RX-TX TX-RX and reset to gnd using 3k resistor.

I couldn't send AT commands in serial monitor in Arduino IDE.

Later I connected a capacitor between Vcc and Gnd. Now I could send AT commands and I am getting same commands back. Whatever I entered, I am getting the same back.

I didn't get reply as OK. And I got some random characters too. Can anyone help me with this?

share|improve this question
    
I think TX needs to go to TX and RX to RX, if you are sending the command via the computer instead of the arduino-sketch. You also need to convert the 5v to 3.3v on the RX line. – Gerben Nov 5 '15 at 19:42
    
You also need to convert the 5v to 3.3v on the RX line. - s/he needs to do what? – Nick Gammon♦ Nov 6 '15 at 6:20
    
I have connected pins like arduino-esp 3.3-vcc gnd-gnd 3.3-CH_PD RX-TX TX-RX and reset to gnd using 3k resistor. - you connected what to what? This is very unclear. Please edit your question and clarify what you have done. Also try to write proper English if possible. Sentences start with a capital letter. – Nick Gammon♦ Nov 6 '15 at 6:22
up vote 0 down vote

Looks like your connection is somewhere missing.

Connect CH_PD and reset pin to high--i.e. 3.3v.

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Please do not insert advertisements into your post. You are welcome to add this to your profile page, but not into the post itself. I've edited it out. Thanks! – Anonymous Penguin♦ Nov 5 '15 at 23:31

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