ESP8266 Community Forum

- Sat Mar 11, 2017 6:37 pm #63591 Hi Guys
Hope this is not a duplicate post

I have an ESP8266 on ESP-01 board mounted on a Wifi shield on Arduino UNO
I am following quick getting started guide: https://www.instructables.com/id/Gettin ... 66-ESP-01/

All powered up OK. Then wasted 3 days going nowhere!
When I send any AT command from Arduino IDE comms monitor via UNO, I get "ERROR" response.
When I reboot the ESP-01 board by grounding the RST pin, I get a strange response:
First I get "garbage" - a few hundred characters like "là| Œ lì b|�‚ì’s“bŒ bŒónnžlno". This looks like baud rate issue to me?
The second line looks fine "Ai-Thinker Technology Co. Ly" This indicates baud rate ok?

Anyone with ideas?
- Why the weird message on reboot?
- Why the "ERROR" message in response to all AT commands?

Thanks

- Sun Mar 12, 2017 4:29 am #63597

Anyone with ideas?
- Why the weird message on reboot?

Most modules will boot at 74,880 baudrate. Whatever speed you've set in your application will only take effect one it's loaded that app. If you change your baud rate to 74880 you can confirm this.

- Why the "ERROR" message in response to all AT commands?

When typing your command instead of typing enter, type ctrl-m ctrl-j (carriage return, line feed).

esp8266 otb-iot software - https://github.com/piersfinlayson/otb-iot
esp8266 otb-iot documentation - https://otb-iot.readthedocs.io/
esp8266 related blog - http://www.packom.net/

- Sun Mar 12, 2017 7:56 am #63600

Why the weird message on reboot?

piersfinlayson is correct about the 74880 baudrate on boot.
I posted an explanation here http://www.esp8266.com/viewtopic.php?f=160&t=12635