CODEWITHSUNDEEP
esp8266
learningtech
learningtech

Reputation: 33715

ESP8266 AT+CWLAP gives generic ERROR message with no details

I have been having trouble all day learning how to enable "AT" commands for the ESP8266 module. I'm using my Arduino Uno as a bridge to my ESP8266. So my pin connections are:

ESP8266     |   Arduino
-----------------------
TX          |   TX
RX          |   RX
CH_PD       |   3.3V (separate battery that has common ground with arduino)
VCC         |   3.3V (separate battery that has common ground with arduino)
GND         |   GND
GPIO0       |   GND

I initially had some success with an ESP8266 Flasher that someone shared here and he provides instructions here. Essentially I use an esp8266_flasher.exe to load a ESP8266_BIN0.92.bin into my ESP module. This worked so far as in when I load up my Arduino IDE Serial Monitor, I can type the command AT and get OK response, and I can type AT+GMR and get the firmware version number. But typing AT+CWLAP after any of AT+CWMODE=1,2,3,etc.. gave a generic ERROR response, with no other details.

Has anyone else had this issue and know how to resolve it?

EDIT

I also tried a second way to resolve my AT command issues as described here: ESP8266 No response in serial monitor from official AT firmware

Upvotes: 1

Views: 2399

Answers (1)

urbanSoft
urbanSoft

Reputation: 760

I know this thread ist super old but I dealt with the same question.

  1. That AT+CWLAP returns an error without any prior connection is desired behaviour. The doc states that AT+CWLAP "[c]onnect[s] an ESP station to a targeted AP with [the] last Wi-Fi configuration." Since there is no last Wi-Fi configuration an error is returned.
  2. Moreover if you have characters like ,, " or \ in your SSID and/or password you do have to escape them (see here). The documentation has an example.
  3. AT+CWMODE=1 is the correct mode if you want your esp to be a client only.

Upvotes: 5

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