I have ESP-01 module. When I bought him, he had SDK V126.96.36.199 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.
Sometimes he will find one network (With old SDK is 10 network)
Command AT+CWJAP="SSID","password" return
I tested CWMODE 1 and 3.
Does anyone have any idea?
SDK V2.1.0 has SNTP Which I need