ESP8266 Community Forum

- Sun Jun 11, 2017 1:26 pm #67023 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

- Mon Jun 12, 2017 6:53 pm #67069 I only upgraded to SDK 2.0.0 July 19, 2016, and I don't have that problem.

- Mon Jun 12, 2017 7:30 pm #67073 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.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Tue Jun 13, 2017 2:35 pm #67128 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.