I have a problem connecting to the ESP-8266. Everything connected according to this diagram (step 3). Installed esptool. uploaded new firmware: . . I then started ESPlorer, unfortunately I can't connect to the chip (I have the same in minicom - I can't type anything in the console) . Anyone have...

. What is this mysterious firmware? I couldn't find any information about it on that page you linked to, and the name esp8266-20190529-v1.11.bin doesn't say much.

Have you checked that after uploading this firmware and rebooting the ESP, the WiFi network named MicroPython-xxxxxx is visible?

It should be visible , if the MicroPython firmware is correctly uploaded. What model of ESP8266 do you have?

I uploaded the file again - the result is the same ( no network, RX/TX does not work). I bought the module some time ago, on the casing it says ESP8266MOD. Module itself looks like yes , it is soldered to yes board. I would add that after uploading the software, no LEDs light up on it (not sure if they should). Maybe there's something wrong with this connection - I've seen different variations on the internet.

I have uploaded this firmware to the ESP-12 you pointed out in post #3 and there are no problems. Code: PythonLog in, to see the code . You can also see the default WiFi network. Do you already have GPIO 0 disconnected from ground after uploading the software?

I have uploaded the firmware. I only left the VCC, GND, and VCC to CH_PD connections and nothing.

RST, GPIO 0 and GPIO 2 should also be 'pulled up' with a 10k resistor to the power supply. GPIO 15 is safe to connect with a 10k resistor to ground. .

Failed connection to ESP-8266 after uploading new firmware

lexom 2046 9

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How can I get an ESP8266 to boot normally and connect after flashing MicroPython firmware?

The ESP8266 is probably not booting into normal MicroPython mode because the boot pins are wired incorrectly; after flashing, GPIO0 must be disconnected from GND, and RST, GPIO0, and GPIO2 should be pulled up to VCC with 10k resistors while GPIO15 should be pulled down to GND with a 10k resistor [#18258646] [#18260860] One reply also confirmed that the same MicroPython firmware worked on an ESP-12 and that the default Wi‑Fi network was visible, so the firmware itself is likely fine [#18258646] If MicroPython is running correctly, a network named like “MicroPython-xxxxxx” should appear [#18257143]

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#1 18256913 03 Nov 2019 21:46

lexom lexom

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Post #1

18256913 03 Nov 2019 21:46

I have a problem connecting to the ESP-8266.
Everything connected according to this diagram (step 3).

Installed esptool. uploaded new firmware:

sudo esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v2.8
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 9.9s
Hard resetting via RTS pin...

sudo esptool.py --port /dev/ttyUSB0 write_flash -fm qio 0x00000 /home/pawel/Pobrane/esp8266-20190529-v1.11.bin
esptool.py v2.8
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Flash params set to 0x0040
Compressed 617880 bytes to 402086...
Wrote 617880 bytes (402086 compressed) at 0x00000000 in 35.5 seconds (effective 139.1 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

.

I then started ESPlorer, unfortunately I can't connect to the chip (I have the same in minicom - I can't type anything in the console)

.
Anyone have any idea what the problem could be ?

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#2 18257100 03 Nov 2019 23:13

Anonymous Anonymous

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Post #2
18257100 03 Nov 2019 23:13

lexom wrote:
uploaded new firmware
.
What is this mysterious firmware? I couldn't find any information about it on that page you linked to, and the name "esp8266-20190529-v1.11.bin" doesn't say much.
#3 18257121 03 Nov 2019 23:27

lexom lexom

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Post #3
18257121 03 Nov 2019 23:27

I uploaded from this page.
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#4 18257127 03 Nov 2019 23:31

Anonymous Anonymous

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Post #4
18257127 03 Nov 2019 23:31

Have you checked that after uploading this firmware and rebooting the ESP, the WiFi network named "MicroPython-xxxxxx" is visible?
#5 18257139 03 Nov 2019 23:36

lexom lexom

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Post #5
18257139 03 Nov 2019 23:36

I have no such network.
#6 18257143 03 Nov 2019 23:41

Anonymous Anonymous

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Post #6
18257143 03 Nov 2019 23:41

It should be visible , if the MicroPython firmware is correctly uploaded.
http://docs.micropython.org/en/latest/esp8266/tutorial/intro.html#wifi
What model of ESP8266 do you have?
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#7 18257158 04 Nov 2019 00:00

lexom lexom

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Post #7
18257158 04 Nov 2019 00:00

I uploaded the file again - the result is the same ( no network, RX/TX does not work).
I bought the module some time ago, on the casing it says ESP8266MOD.
Module itself looks like yes , it is soldered to yes board.
I would add that after uploading the software, no LEDs light up on it (not sure if they should).
Maybe there's something wrong with this connection - I've seen different variations on the internet.
#8 18258646 04 Nov 2019 20:37

Anonymous Anonymous

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Post #8
18258646 04 Nov 2019 20:37

I have uploaded this firmware to the ESP-12 you pointed out in post #3 and there are no problems.
Code: Python
Log in, to see the code
.
You can also see the default WiFi network.

Do you already have GPIO 0 disconnected from ground after uploading the software?
#9 18260789 05 Nov 2019 22:11

lexom lexom

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Post #9
18260789 05 Nov 2019 22:11

I have uploaded the firmware.
I only left the VCC, GND, and VCC to CH_PD connections and nothing.
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#10 18260860 05 Nov 2019 22:44

Anonymous Anonymous

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Post #10
18260860 05 Nov 2019 22:44

RST, GPIO 0 and GPIO 2 should also be 'pulled up' with a 10k resistor to the power supply. GPIO 15 is safe to connect with a 10k resistor to ground.

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Topic summary

The discussion revolves around a user's inability to connect to an ESP-8266 module after uploading new firmware (esp8266-20190529-v1.11.bin) using esptool. The user reports that the expected WiFi network "MicroPython-xxxxxx" is not visible post-upload, and no LEDs light up on the module. Other participants suggest checking the wiring, ensuring GPIO 0 is disconnected from ground during the upload, and pulling up GPIO pins with resistors. The user confirms the module is labeled ESP8266MOD and has attempted re-uploading the firmware without success.
AI summary based on the discussion. May contain errors.

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Failed connection to ESP-8266 after uploading new firmware

Failed connection to ESP-8266 after uploading new firmware

How can I get an ESP8266 to boot normally and connect after flashing MicroPython firmware?

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