no wifi (esp_0) after flash on S20

[dynamicdave]

I've got the same problem trying to flash a couple of S20 Sonoff.
Never done this before!!

Tried all sorts of flashers/loaders and various firmware files.

I received 5-off Wemos D1 Mini devices in the same package as the S20s and they flashed with no problem at all.
The markings on the PCB says S20-EU-V1.3 date 2017-2-16
The chip has engravings saying it is an ESP8266.

Any help/guidance/devine wisdom would be much appreciated.

Cheers from David

[grovkillen]

You could try flashing it using 8255.

[dynamicdave]

I've got the same problem trying to flash a couple of S20 Sonoff.
I've used SonOff switches in the past, but never used the S20 before!!

Tried all sorts of flashers/loaders and various firmware files.
It seems as if the S20 has been flashed, but the ESP_easy_0 wifi never shows up.

I received 5-off Wemos D1 Mini devices in the same package as the S20s and they flashed with no problem at all.
The markings on the PCB says S20-EU-V1.3 date 2017-2-16
The chip has engravings saying it is an ESP8266.

Any help/guidance/devine wisdom would be much appreciated.

Cheers from David

[dynamicdave]

You could try flashing it using 8255.

The markings on the chip says it's an ESP8266.

What are you suggesting?
1. Try flashing it with firmware for 8255, or
2. Flashing with the ESP8255 flasher tool

Reading all the above messages it sound as if lots of people are having this problem.

My S20s are for the UK mains plugs with code; S20-EU-V1.3 dated 2017-2-16

Any help/suggestions would be appreciated as I'm pulling my hair out!!!

Cheers from David

[grovkillen]

My suggestion is to flash it using the bin file for ESP8285 (sorry 'bout that typo) since the ESP8285 is equal to the ESP8266 except that the 8285 has 1MB built in mem.

The newer Sonoff seems to need other flash settings active, which the bin file for ESP8285 seems to have (please correct me if I'm wrong here...).

[dynamicdave]

My suggestion is to flash it using the bin file for ESP8285 (sorry 'bout that typo) since the ESP8285 is equal to the ESP8266 except that the 8285 has 1MB built in mem.

The newer Sonoff seems to need other flash settings active, which the bin file for ESP8285 seems to have (please correct me if I'm wrong here...).

Thanks for your swift response.
I'll try it later today.
This morning I had a couple of SonOff Touch Switches arrive - it will be interesting to see if I can flash them - I think they do have ESP8285 chips inside them.

Cheers from David.

[grovkillen]

Regarding the Touch you should follow the wiki. They are covered with a guide on how to flash etc.

[dynamicdave]

Regarding the Touch you should follow the wiki. They are covered with a guide on how to flash etc.

BRILLIANT news to report to you.
Thanks to your suggestion, I've managed to get both S20 working.

Kind regards from David.

[grovkillen]

Great! Happy to have helped.

[bobbybeans]

wow didn't know this thread was still going! yeah I can confirm mine has 8266 on it but the new ones I will try the 8285

[kurczak2]

Hi,
I am a new user. I just wanted to say that I had the same symptoms as described here. Flashing always successful, but later AP ESP_0 is missing. I tried different versions of Mega, 2.0, R120 .. - always the same result - wifi does not appear. Different flaschers. Finally, I used ESP Easy Flasher created by Grovkillen and the first time I was able to program my Sonoff TH10 v2.0. I have marked options:
"Post flash action",
"Halt app before flash"
"Force D-OUT"
I chose the firmware for ESP8285 - this chip is in Sonoff TH10 / 16 v2.0
I entered the details of my WiFi and IP address.
After pressing the "Flash ESP Easy FW" button my Sonoff was programmed. I unplugged Sonoff's power and plug it in again. I pressed the continuation button that appeared in the ESP Easy Flasher program. Over the serial connection WiFi details and IP address were transferred to Sonoff. After restarting, Sonoff has already started up connected to my WiFi! A huge thank you to Grovkillen for making this program - it saves a lot of stress to beginning users like me.

[grovkillen]

Wow, thank you for the feedback!

[Methuselah]

The S20 is technically more or less same as the sonoff basic.

I have two Sonoff basics. The wifi chip is emprinted with "ESP8266EX" writing, but the only way I have gotten ESPEasy to work on it is to flash it with the 8285 image rather than the 8266 image.

[Ath]

Another struggler here.
Flashing my S20's didn't result in the device booting up correctly. Flashing the prebuilt bin files wouldn't work with the default flash tools, including the Espressif flasher...
After building the bin file myself using Arduino IDE, setting Board to Generic ESP8266 Module, Flash Mode to DOUT, and Flash Size to 1M (128 K Spiffs) I finally succeeded in flashing my Sonoff S20 devices (Chinese nock-offs, but fine quality altogether).

Thanks for all the tips I found here!

[mortyone]

As with everyone else, I've spent stupid hours trying to flash my Sonoff S20 too.

It's a UK plug, the board is printed with S20_EU_V1.3 2017-2-16 1882.

The chip has ESP8266 printed on it.

I got it working with ESPEasy_v2.0.0-dev9_normal_8285.bin, which I flashed using MODEMCU Firmware Flasher. I changed to DOUT!

For whatever reason, the chip has 8266 printed on it, however only the 8285 firmware works! Trying to use the 8266 binary just results in a dead device.

Thank you to the others in this thread for highlighting the 8255 issue with the newer UK S20 devices.

[dampa]

I use the CP2102 moduls USB-TTL connecter and plug the four pins to the correct header points on the S20.

One thing I discovered is that (for me) using the S20's
– S20's with versions < v1.3 - I need to connect TX-RX and RX-TX
– S20's with versions v1.3+ – I need to connect TX-TX and RX-RX.