ESP8266 Community Forum

Hi
I have ESP-01 module. When I bought him, he had SDK V1.5.4.1 and command AT+CWLAP worked properly.

I have updated the firmware to the latest one SDK V2.1.0 https://github.com/espressif/ESP8266_NONOS_SDK

AT+CWLAP command does not find the network.
[lis]
AT+CWLAP

OK
[/lis]
Sometimes he will find one network (With old SDK is 10 network)

Command AT+CWJAP="SSID","password" return
[lis]AT+CWJAP="SSID","password"
+CWJAP:1

FAIL
[/lis]
I tested CWMODE 1 and 3.

Does anyone have any idea?
SDK V2.1.0 has SNTP Which I need

I only upgraded to SDK 2.0.0 July 19, 2016, and I don't have that problem.

Someone else here on the forum is having the exact same problem.

My guess (upto now) is that:

• you're using the wrong .bin-files for your flashmemory (4Mbit <=> 8Mbit)
  or
• the latest firmware simply doesn't support your (4Mbit?) device anymore (or isn't properly tested).

You'd better go back to an older version that still works.

I have 8Mbit Flash.
When I upgraded to SDK 2.0.0 AT+CWLAP command also does not find the network.
The problem was solved.
I erased the chip (25F08) and uploaded the firmware again on empty flash.
Strange case, but it works
Sorry for the spelling, but I'm from Poland.