ESP8266 Community Forum

- Sun Sep 06, 2015 7:33 pm #27975 Hi,

I just got my ESP8266, and I'm already stuck... At boot I get this message;

"Some random characters"
Ai-Thinker Technology Co. Ltd.

invalid

AT command gives me OK

AT+GRM:
AI version:0.21.0.0
SDK version:0.9.5
OK

AT+RST:
est Jan 8 2013, rst cause:4, boot mode: (3,6)

wdt reset
load 0x40100000, len 816, room 16
tail 0
chksum 0x8d
load 0x3ffee8000, len 788, room 8
tail 12
chksum 0xcf
ho 0 tail 12 room 4
load 0x3ffe8314. len 288, room 12
tail 4
chksum 0xcf
csum 0xcf

2nd boot versionn : 1.2
SPI Speed: 40 MHz
SPI Mode: QIO
SPI Flash Size: 4 Mbit
jump to run user1

rl ,ÿ
Ai-Thinker Technology Co. Ltd.

invalid



What can I do to make it work?
For now, I just want to connect to my WiFi.
Tried to google it, but I can't find anyone with a similar problem.


Thanks in advance!

- Sun Sep 06, 2015 8:08 pm #27979 Do you means you wish to know which AT commands let you connect to another router ?

Do some reading there https://github.com/CHERTS/esp8266-devki ... _v0.40.pdf

In short, you need to do an AT+CWMODE=3, then AT+CWLAP to list all APs available around, then you can connect to specific one with AT+CWJAP="MyDLink","MyPassword".

- Mon Sep 07, 2015 4:49 am #28246 Ok, so you mean that it doesn't matter that it says invalid instead of ready?

- Mon Sep 07, 2015 8:47 am #28514 I don't known why/where this "invalid" comes from, especially that I'm not using AT firmware.
It is probably that saved wifi configs are invalid when trying to do auto-reconnect.
Maybe it will disappear when you will succeed to have your first connection.