ESP8266 Community Forum

- Tue May 19, 2015 11:12 am #17870 Hello,

I have two ESP8266 modules. Connected each of the modules to a PC via a TTL serial to USB converter and powered the modules with 3.3 VDC.

On the computer I am running a Terminal program set to 115 kbaud.

Below is a copy of what I am getting from either of the modules on power up or on hard reset. As you see, after some gibberish the modules respond with "ready", however my attempts to send some AT commands produce no action and no response other than echo.

I need and will appreciate help figuring out what I am doing wrong or what I am not doing and should be. I do have a jumper between Vcc and CH-PD pins on the header.

The modules here are certainly at 115k, they don't do anything on 9600, but respond with "ready" on 115k. Are they supposed to boot from the on-board FLASH or a UART boot is necessary even if I am not trying to customize the firmware?

Regards and thank you in advance


Terminal output :


r _ _ _ Ž

b ç $ ‰ r _ _ r _ _ p ò n à Ã Ü €


_ à ‚ Ç À l _ €


_ €


_ €

b À _ n â ã n À _ ﾏ ‚ Œ Ž 8


_ Œ ò n n î _ Ä Á Œ Ž ’ Ü < _ Ä ß


_ à


b À Ä > ~ ò n î _ Ä ð


_ r _ _ ﾐ _ Ü # ‚ n À $ Ž Œ l ` _ ä 8 ` r n | ’ ’ n À _ Ž à r Ü _ ’ ` _ _ 9 ~ _ Ä À


_ ﾐ _ Ü # ‚ n À $ _ Œ


_ Œ ò n n î _ Ä È l ` _ _ n n à Ã Ü b À Ä ¾ ~ ò n î _ Ä Á Œ _ _ $ ` _ Ä Ž | ‚ Ü _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ j ¤ ü ä ÿ r _ _ Ž _ ô

A i - T h i n k e r T e c h n o l o g y C o . L t d .



r e a d y

A T
A T + R S T
A T + M O D E = 3
A T + C W L A P
A T + G M R

- Tue May 19, 2015 7:53 pm #17909 Make sure you have gpios, ch enable, and rst high. I have the most luck taking ch enable high 500ms after power up.

8 Mhz 28 PIN AVR!!!!!

- Tue May 19, 2015 9:57 pm #17915 This seems more that you didn't tried CR/LF instead of plain CR ...

- Wed May 20, 2015 11:07 am #17970

This seems more that you didn't tried CR/LF instead of plain CR ...

That was it!


Thank you all for responding. It is greatly appreciated.