at+ commands respond with error

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Joined: Wed Oct 04, 2017 7:06 am

at+ commands respond with error

Postby microic » Wed Oct 04, 2017 2:38 pm

Hi to all,

I purchase 20 x ESP8266-12 from e-bay. I connect two of them for test and notice that both can communicate on 115200 baud, AT command respond with OK, but on all AT+ command respond with error.
At the end I can not use AT command with both unit. Firmware installed is AI Thinker 0.9.2
I will appreciate any help.

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Posts: 467
Joined: Wed Jun 29, 2016 7:17 pm
Location: India

Re: at+ commands respond with error

Postby pratik » Fri Oct 06, 2017 7:37 pm

The firmware is REALLY REALLY outdated. You need to have at least v.1.5.4, which is stable. Please check out the latest firmware at
To flash the firmware to ESP8266, you will find many tutorials online.
Pratik Panda

Custom firmware, Knowledge base and freelancing (ESP8266/ESP32):

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