Flashed the ESP-01S to new firmware, now can't send any AT commands

Asked Mar 02 '20 at 22:29

Active Mar 02 '20 at 22:29

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I've have been trying to flash the ESP-01S to the 1.5.1 from the official website. I am also using their own flash tool. The tool detects the component and completes the update all the time, this is what it detects:

5Eh : N/A
flash devID:
4014h
QUAD;8Mbit
crystal:
26 Mhz

AP:  CA-2B-96-03-59-AF  STA:  C8-2B-96-03-59-AF

Now when I try connect everything up with my arduino and try some AT commands through the serial port, nothing happens. When the ESP is first switched on it spits out the normal gibberish however, it now doesn't say "READY" and every time i send an AT command it sends no reply. I can still reflash the device but, no matter what I try no AT command work.

asked Mar 02 '20 at 22:29

Ajay Varghese

did you disconnect io 0 from ground after flashing? – Juraj Mar 03 '20 at 07:09
Yeah I did, I removed IO0 from ground to try the AT commands – Ajay Varghese Mar 03 '20 at 18:10
how do you power it? – Juraj Mar 03 '20 at 18:46
External power supply on 3.3 volts. – Ajay Varghese Mar 03 '20 at 22:33
now I remembered the problem. use DIO setting – Juraj Mar 04 '20 at 06:38
Alright i'll give that a go. – Ajay Varghese Mar 04 '20 at 17:20
why do you flash so old version? – Juraj Mar 04 '20 at 17:22
I'm flashing the old one because my chip only has 1mb of flash memory and after 1.5 all the updates are for chips with 2mb. I tried flashing with DIO but also to no avail. I did however find this, ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x40100000, len 1856, room 16 tail 0 chksum 0xef load 0x00000000, len 0, room 8 tail 0 chksum 0xef load 0x00000000, len 0, room 0 tail 0 chksum 0xef csum 0xef csum err ets_main.c Sorry about formatting, can't seem to get the code format to work in comments. The above come up with the baud rate is set to 74880 – Ajay Varghese Mar 04 '20 at 18:11
1.6 has 512+512. and here is 1 MB build of 1.7 https://github.com/loboris/ESP8266_AT_LoBo with a flashing script – Juraj Mar 04 '20 at 18:32
Followed the instructions on the github page but, unfortunately it still doesn't work. – Ajay Varghese Mar 04 '20 at 20:21

Flashed the ESP-01S to new firmware, now can't send any AT commands

0 Answers0