No Wi-Fi AP named sonoff-xxxx after flashing S20

[Achim Weßling]

Hi!

I tried to flash a brand new Sonoff S20. Everything seams to work fine, but I do not get any Wi-Fi after restarting the device!

How can I figure out, what went wrong?

I did the following:

root@ZenBook:~/work/Heimautomation# esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v2.6
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
MAC: dc:4f:22:37:b3:b5
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 2.9s
Hard resetting via RTS pin...
root@ZenBook:~/work/Heimautomation#

Reconnect in flash-mode and ...

root@ZenBook:~/work/Heimautomation# esptool.py --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 sonoff-DE.bin
esptool.py v2.6
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
MAC: dc:4f:22:37:b3:b5
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Compressed 521056 bytes to 356399...
Wrote 521056 bytes (356399 compressed) at 0x00000000 in 31.5 seconds (effective 132.3 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
root@ZenBook:~/work/Heimautomation#

For me everthing looks fine!? After this I reassambled the device and plugged it to 240 V, but dit not get a Wi-Fi.

Any help is welcome! Thanks in advance!

Achim

[Phil]

try connecting your usb/ftdi device and opening a serial monitor/terminal emulator at the device to monitor its serial output as it starts up.

 

it means dissembling again sorry, but its bound to shed some light on the situation.

also sometimes the ap ssid is ITEAD-XXXX too !!

[Yann Mengin]

Hi

After the steps you have described, switch off then switch on the 3.3V and send the foolowing command

python3 /usr/bin/miniterm.py /dev/ttyUSB0 115200

At the prompt type Wificonfig 2

The Sonoff Hotspot should apprear

Yann

On 8 Jun 2019, at 02:50, 'Phil' via SonoffUsers <sonof...@googlegroups.com> wrote:

try connecting your usb/ftdi device and opening a serial monitor/terminal emulator at the device to monitor its serial output as it starts up.

 

it means dissembling again sorry, but its bound to shed some light on the situation.

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