No AT commands after flashing

Posts: 3
Joined: Wed Jan 17, 2018 4:16 am

No AT commands after flashing

Postby who_took_my_nick » Thu Jan 18, 2018 7:33 pm

I flashed my ESP-01 with ESP Flash download tool V2.3. SDK i used is ESP8266_NONOS_SDK_V.2.0.0_16_08_10 downloaded from here. I added this paths:
blank.bin 0xFB000
esp_init_data_default.bin 0xFC000
blank.bin 0x7E000
blank.bin 0x7E000
boot_v1.6.bin 0x00000
at\...\ 0x01000
I set:
crystalfreq to 26M
SPI speed to 40MHz
Flash size to 8Mbit
proper com port
baudrate to 115200

After i set ESP to flash mode i hit START. All gone ok with last lines on terminal:
writing at 0x000fc000... (99%)
com closed

And on download tool i get massage Finish. I pressed reset on my ESP and after that i started Serial to check the result. But there is nothing.
When i disconnect CH_PD for a sec i get: ets Jan 8 2013,rst cause: 1, boot mode:(1,7) which i think indicates not enough power.

I power ESP with external power supply on 9V 600mA step down with XL4015 to 3,3V which i checked with multimeter.

No it doesn't work or i didn't do something right. Any help would be nice.

Her Majesty
Posts: 315
Joined: Mon Oct 27, 2014 11:09 am

Re: No AT commands after flashing

Postby Her Majesty » Tue Jan 23, 2018 12:32 pm

You should check your GPIO0, when GPIO0 is low-level, it is in UART downloading mode; if GPIO0 is high-level, it will boot up from flash.

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