sOnOff Basic R2 v1.0 2017-10-11 : Cant flash it

[xMad]

Hi,

I can flash sOnOff TH16 on a Rasp Pi 3B with esptool.py  from arendst/Sonoff-Tasmota.

BUT

on a sOnOff Basic R2 V1.0 2017-10-11 I can't. Looks it don't enter in flash mode.

Do someone manage to flash on these ?

Thanks

[Andy Maddick]

Looks it don't enter in flash mode.

So when you hold down the button & apply power, what does the LED do ?
What version firmware ? eWeLink
There maybe an option to OTA

[xMad]

Device is Ok with eWelink

No led are blinking before flash.

For TH16 I flash it with last release of tasmota (Sonoff-Tasmota) and with standard sonoff.bin (I then use button (4 click) to enable wifi and change it through web)

For Basic R2 I can't connect to esp (try DOUT ....)

[Andy Maddick]

Tried to help you on github...
I solved 3 others flashing problems..
Gave up because I need information, so ask questions..
Ask yourself... Did you answer my questions ?

I will repeat & add more..

It may have PUYA on the flash chip, can you see those letters ?

So when you hold down the button & apply power, (to flash) what does the LED do ?

What does the LED do when you turn it on, without trying to flash ?

Does it work in eWelink ?
What version of eWeLink firmware is installed on the device ? eWeLink App will tell you...

Andy

[Andy Maddick]

Also put it into flash mode

use esptool.py read_mac

do you get a response ?

[xMad]

Hi,

It may have PUYA on the flash chip, can you see those letters ?

=> No (on ESP chip)

So when you hold down the button & apply power, (to flash) what does the LED do ?

=> No LED (connected to Rasp Pi)

Does it work in eWelink ?

=> Yes

What version of eWeLink firmware is installed on the device ? eWeLink App will tell you...

=>1.6.0
Xavier

[xMad]

pi@X_Pi:~/sonoff/Sonoff-Tasmota $ esptool.py --port /dev/ttyAMA0 read_mac

esptool.py v2.3.1

Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header

Note : I swap RX/TX, same result

Note2 : Same config Ok for sOnOff TH16

[Andy Maddick]

It may have PUYA on the flash chip, can you see those letters ?

=> No (on ESP chip)

No the memory chip, not the ESP8266 chip, anyway does not matter, you can not even connect via serial cable..
This is the first step which you must get past..

Have you every flashed older Sonoff Basic modules ?

Can you show a picture of your soldering ?
Where are you connecting the 4 leads, 

Power pin is closest to 'button', followed by 2 coms wires (RX<TX) then GND..

[Andy Maddick]

It may have PUYA on the flash chip, can you see those letters ?

=> No (on ESP chip)

No the memory chip, not the ESP8266 chip, anyway does not matter, you can not even connect via serial cable..
This is the first step which you must get past..

[xMad]

No can't read PUYA elsewhere

For sure a I have to connect via serial first...

I've flashed several "old" sOnOf previously and a TH16 recently. Never had this issue

I respect tuto : Vcc (close to the button), TX, RX (or swap), GND, Not used

I've 4 of those Basic R2

[Colin Law]

On 29 March 2018 at 09:03, xMad <xavier....@gmail.com> wrote:

No can't read PUYA elsewhere

For sure a I have to connect via serial first...

I've flashed several "old" sOnOf previously and a TH16 recently. Never had this issue

I respect tuto : Vcc (close to the button), TX, RX (or swap), GND, Not used

I've 4 of those Basic R2

Well if the others all work and that one doesn't I suspect a hardware issue.  I guess you have already checked that you haven't got a solder bridge on one of the header pins you soldered in.  Other than that in your situation I would probably bin it (well metaphorically at least) and get another one.  It is not worth spending hours trying to analyse the problem on something that costs so little.

Colin

[Andy Maddick]

do you still have older Sonoff, can you connect serial cable with sonoff off, power up & using monitor and view serial output ?
Soldering looks fine
@Collin he has just purchased 4 of these new Sonoff Basic modules, can not flash one..
It will get harder for us all to find older stocks of Sonoff modules, the cause needs to be investigated..
The Sonoff Basic modules I own are TH_V1.1, 2017-5-5

these new ones are R2 V1.0 Sonoff Basic 2017-10-11

xMad can you try esptool.py and hold button down, not for a moment.. but hold down and keep holding down while you power, is there any serial output at all ?
esptool.py READ_MAC will not work while something else is already using the serial connection..So turn other programs off..

[Colin Law]

On 29 March 2018 at 14:00, Andy Maddick <oxy...@gmail.com> wrote:
> ...

> @Collin he has just purchased 4 of these new Sonoff Basic modules, can not
> flash one..

Oh, I misunderstood, I thought the others were ok. If all are failing
then it is obviously something more serious.

Colin

[Andy Maddick]

xMAD, 

you need to confirm that your serial interface still works OK on older Sonoff hardware that you have, 

you do not need to change anything on that device if is already perfectly operating,

but you must confirm at least you can get a read...
Do you use any form of serial monitor ?

I use the one internal to platformIO inside Atom, without a serial monitor things become guess work..
If you have never used a Serial Monitor, it is time you learnt
Your PC is Windows or Linux ?

[xMad]

Hi Andy,

I'm flashing through Rasp Pi 3 B.

I don't use any serial monitor thus I flash old/recent (but NOT sOnOff Basic R2) without any issues....

Recently my RaspPi/ miniterm.py can see data from a sOnOff TH16.

=>So I need to have a look to platform IO

Keep you inform. But I think that Basic R2 have something new....

Xavier

[Andy Maddick]

So if you connect your 'R2 Sonoff Basic' with power OFF to a "Serial Monitor Program" with your serial cable connected...

Power ON Sonoff, baud 115200 or maybe 74880, do not put in flash mode.
Just turn on, do you see any output in the "Serial Monitor Program" at all ?
Can you even make a screenshot ?

[Andy Maddick]

Just to clarify, you should also specify the port too

esptool.py /dev/ttyAMA0 read_mac

[Andy Maddick]

Avoid the new post on Github, there are better ways than that, 

just get a USB to TTL UART adapter which supports 3.3V logic lines & has a 3.3V regulator on board..
Much easier & less messy

[Andy Maddick]

For example CH340G

[xMad]

HI,

I use this adapter

I use puTTy on W10 (connect on port given when I plug adapter : COM4 )

See https://uplogix.com/docs/local-manager-user-guide/introduction/connecting-to-usb-console-windows-10

NOTHING on the console (try baud 115200 and 74880, swap TX, RX )

Note : My adapter is blinking (litle green light) when I strike key

Note :  No light on the sOnOff R2 even if I just put VCC and GND

Le samedi 31 mars 2018 00:26:29 UTC+2, Andy Maddick a écrit :

For example CH340G

[xMad]

And I have check voltage : 3.3v for all

[Andy Maddick]

I use this adapter

I use puTTy on W10 (connect on port given when I plug adapter : COM4 

That looks like a FTDI  chip adapter, I see no 3.3V regulator, only switchable TTL logic voltage 'jumper'.
I can not see the labels for the "Output Pins", if it has a 3.3V output pin (not TTL) then it may not be able to supply enough current.
I have used the 5V pin on FTDI adapter with no issues to supply power to the Sonoffs, with around 40 Sonoff basic units connected this way..

If you have Arduino Board which has 3.3V you could use that as a power supply, 

only connect RX, TX & GND from your adapter & 3.3V & GND from your other power source..

If you use 3.3V from adapter, after it is connected to Sonoff does the voltage drop.. Use a Multimeter ?

[xMad]

So

I use an external power supply : ywRobot (voltage could be 3.3V and 5 V)

I've connected RX, TX & GND from your adapter & 3.3V (or 5V)  & GND from your other power source..

Voltage are not dropping while sOnOff is powered on.

While not in flash mode :

Terminal is empty (use Win10 Terminal/1.9.3b from br@y++)

If I test adapter with it (connectionf TX and RX) it works.

I do the test on 3  sOnOff R2 V1

Of course i can't flash it !

Any ideas ?

[Andy Maddick]

[xMad]

It is connected

Just a perspective issue with the image

Again i've flash 2 "old " Basic sonoff (don't have access to them) and recently 2 TH16 with no issues.

My problem is with those new R2

Is there something else I can do ?

- No led blinking if I power sonoff (with no adpater) (TH16 was blinking)

- Nothing on serial (not in flash mode)

I can read some issues on github for R2.

Thanks

Le jeudi 5 avril 2018 01:27:39 UTC+2, Andy Maddick a écrit :

[Andy Maddick]

Is there something else I can do ?

So when you power the Sonoff with Main power, led blinks ?

[xMad]

Yes, it's fully operable with eWelink

Regarding your experience I've buy the same adapater as yours

But result is the same 

Test with 3.3 V (voltage checked wit multimeter)

(of course I try swapping TX RX)

CONNECT BAUD: 115200

============

....._____....._____....._____....._____....._____....._____....._____....._____....._____....._____[2018-04-05 19:08:47,424][ESP8266Loader_spi[1]][espDownloader.pyo][line:351][ERROR]: Chip sync error: Failed to connect to ESP8266: Timed out waiting for packet header

[2018-04-05 19:08:47,424][ESP8266Loader_spi[1]][espDownloader.pyo][line:439][ERROR]: ESP8266 Chip sync error esp_sync_blocking.

What else would I try ?

[Andy Maddick]

5 pins on header
Closest to long button, is power then - rx, tx, then GND then GPIO14
Does this new adapter if only used to supply power, do not enter flash mode, just as power source make green light come on ?

Next ?
First connect RX, TX & GND only - no power
Connect mains... Be an adult be careful...
Read Serial...... Putty ?

[xMad]

Coud you explain
“Does this new adapter if only used to supply power, do not enter flash mode, just as power source make green light come on ?”

[Phil]

Fwiw i also use the same usb programmer with the gold edge, mine is able to supply enough power to flash sonoff basic, rf,pow,th-x, 4ch-pro and other devices without additional power needed,

how many of these V2 devices do you have?  do they all exhibit the same behaviour?  sonoff-rfs ordered direct from itead within the last 3 months arrived and flashed ok??

The only other thing i can think of is trawling the web for pics of the soc with gpio0 etc clearly indicated and attempt to trace the relevant tracks back to the gpio pin header and push button to confirm its the same animal.

However there have been no changes to the itead wiki page https://www.itead.cc/wiki/Sonoff since the exciting release of the ip68 box..

Perhaps its a faulty module?  is the factoty flashing done post assembly via pogo pins and the gpio header or if perhaps at an earlier stage or thru a different interface then a tracking/component fault from the user header and soc may exhibit the behaviour your experiencing?   

ask the official itead support list? 

http://support.iteadstudio.com/support/discussions

[Andy Maddick]

Using new adapter to supply power,

not entering flash mode, 

just as a power source 

Does green light come on ?”

On Friday, April 6, 2018 at 5:56:28 AM UTC+10, xMad wrote:

Coud you explain
“Does this new adapter if only used to supply power, do not enter flash mode, just as power source make green light come on ?”

New question, 

When using Mains AC power, (carefully) measure voltage between 

power VCC pin (first pin, closest to long push button) on Sonoff

& 

GND pin (fourth pin) on programming header..
How much ?

[xMad]

I have 4 of those SonOff Basic R2 V1.0 2017-01-11

All have the same issue with tasmota flashing (can't enter flash mode) but are all fully fonctionnal with eWelink.

I can't find any specific pics for this new R2 ! 

Will try to ask to iTead...

Thanks

[Phil]

Please keep us up to date with any progress..  if it wasnt for the photos you posted of the device in question with sonoff clearly visible on the pcb i would suspect they were clones or copies ??  

AS its pulling gpio0 to gnd at startup that puts the device into flashing mode and you dont seem to be able to get the device into flashing mode...  its a fair bet that the problem may lie in that area so i would try to identify the gpio0 leg on the soc and ground it directly..

this pic in the wiki  indicates its usually an esp8266EX component employed.

https://github.com/arendst/Sonoff-Tasmota/wiki/Sonoff-Basic#serial-connection

(not gpio0 connected to in the pic btw..)

 If yours is the same here is the data sheet for that component that will tell you the leg gpio0 is connected to.

https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf

There are pics on the tasmota wiki of some devices like the B1 bulb? indicating the gpio0 leg of the smd soc component tho thats using a 8265 iirc,  have a hunt about and if soldering onto a tiny leg is a problem i would suggest trying a lump of blu-tak as a moveable wire holder ;) 

cant promise this will help/work, but it seems like the next thing to try ??

[xMad]

I have some undreadable data in putty (115200 or 74880, databits 8, stop bits 1, parity noneflow xon/xoff)

[xMad]

Input is 250 AC

Voltage is at 0.25 V DC

[Andy Maddick]

On the R2 picture you supplied there are changes in the power circuits...
I will measure the voltage on these pins and report back later, just woke...

have you tried to FLASH, while it is connected this way ?
Give it a go ;)

I have never connected serial output while running original sonoff firmware, so not sure if garble is expected..
and I do not have a Sonoff handy with original firmware to test..

[Andy Maddick]

XMAD

Can you confirm

The LED only glows while connected to mains...
The LED never glows while using the normal 'programming header pins' to supply power
0.25V seems like the main problem, they have changed the power circuit, I can see that in pictures you showed of the circuit board

[Andy Maddick]

On Saturday, April 7, 2018 at 2:11:02 AM UTC+10, xMad wrote:

[Andy Maddick]

So you can flash now ;)

This is the problem, without modifying the board, the first pin closest to the 'long button' is no longer able to supply power..
Choices are connect: 

1. USB to TTL ------ to RX, TX & GND, do not connect power low voltage power, use AC mains
   
2. or supply low voltage to board, will require soldering.. likely 5V zener diode on the board, or 3.3V to regulator..
   

I would love to see existing firmware

esptool.py.exe --port /dev/ttyAMA0 -b 230400 read_flash 0x0 0x100000 Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

This command will back-up / copy the Original Firmware

[Andy Maddick]

Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

[xMad]

Hi Andy

I confirm

LED only glows while connect to main power

LED never glows while connected to pin (3.0v or 5v)

[Andy Maddick]

Ready to flash ?

[xMad]

Andy,

My 2 others have different labels.

Le samedi 7 avril 2018 00:51:51 UTC+2, Andy Maddick a écrit :

will export you the firmware this we

Xavier

 

Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

[xMad]

Ready but not flash

RX, TX & GND (of RasPi), do not connect power low voltage power, use AC mains

Put Main power while holding down button (no LED glowing on sOnOff) (If I only put without holding button, sOnOff is online with LED glowing)

=>

pi@X_Pi:~/sonoff/Sonoff-Tasmota $ sudo esptool.py --port /dev/ttyAMA0 -b 230400 read_flash 0x0 0x100000 Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

esptool.py v2.3.1

Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Invalid head of packet ('\xe0')

[Andy Maddick]

Sounds great !

have you tried swap RX, TX <--> TX, RX ??

[Andy Maddick]

Or use windows and USB TTL ?

looks ready

[Andy Maddick]

Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

Original_Sonoff_Basic_R2_Firmware_1M_10002E2738.bin

Original_Sonoff_Basic_R2_Firmware_1M_10002E9BE1.bin

 yes, change to match each device's serial, the firmware only works on original device

[Andy Maddick]

Any luck Xavier ??

[xMad]

I have to build the Win10 environnement to flash

Currently I only flash with RaspPi / esptool.py

Note : I've try to swp RX/TX : Same results

Keep you inform

[Andy Maddick]

On Sonoff

pin 1 power (closest to long button)

pin 2 RX goes to TX on USB TTL device (Also GPIO 3)

pin 3 TX goes to RX on USB TTL device (Also GPIO 1)

pin 4 GND

pin 5 GPIO 14

This is absolutely correct, keep for reference ;)

Even try basic read in flash mode

like READ_MAC

esptool.py /dev/ttyAMA0 read_mac

Windows

esptool.py --port COM5 read_mac

End this ! Hurry up and flash already :)

[Andy Maddick]

COM5 as above, of course change to suit your device's USB port.

[xMad]

So

Main Power from sOnOff

Adapater

GND => Pin4

TX => Pin 2

RX=> Pin3

VCC not connected

Connect Adpater to sOnOff (COM5)

Hold button down while putting Main power on sOnOff (LED not blinking on sOnOff)

....

................

T:\sOnOff\esptoolPY>esptool.py.exe --port COM5 read_mac

esptool.py v2.3.1

Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Invalid head of packet (b'\x01')

..............

T:\sOnOff\esptoolPY>esptool.py.exe --port COM5 read_flash 0x0 0x100000 Original_Sonoff_Basic_R2_Firmware_1M_10002E5EEF.bin

esptool.py v2.3.1

Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Invalid head of packet (b'\x90')

Note tried with several --baud options : always same result

=> Looks like not entering in flash mode

[xMad]

Trace if it can help

Connecting...TRACE +0.000 command op=0x08 data len=36 wait_response=1 timeout=0.100 data=b'\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU'

TRACE +0.000 Write 46 bytes: b'\xc0\x00\x08$\x00\x00\x00\x00\x00\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU\xc0'

TRACE +0.008 Read 1 bytes: b'\xc0'

TRACE +0.001 Read 11 bytes: b'\xf9\xcez\xfc\x07\x07\x92>x\xfc\xfe'

TRACE +0.005 Read 1 bytes: b'\x90'

TRACE +0.000 Read 31 bytes: b'\x04\x02\x00\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x00\x00\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x00\x00\xc0\xc0\x01\x08'

TRACE +0.001 Full packet: b'\xf9\xcez\xfc\x07\x07\x92>x\xfc\xfe\x90\x04\x02\x00'

TRACE +0.002 Full packet: b'\x01\x08\x02\x00\x07\x07\x12 \x00\x00'

TRACE +0.010 Full packet: b'\x01\x08\x02\x00\x07\x07\x12 \x00\x00'

TRACE +0.010 Read 123 bytes: b'\x02\x00\x07\x07\x12$@!\xc0\xc0\xf1\xcf\xe5\xff\xfe\xf9\xef\xfa\xfe\xe7\xe7\xba\xeb\xe5\xef\xff\xfd\xef\xfb\xfc\xff\xc0\xc0\xc8\x00\xff\xc0\xff\xc0\xff\xf8\x02\x00\x07\x90 \x01\xfd\xc0\xc0\x01\x08\x02\x00\xff\xff\xfe \x01\xf5\xc0\xc0\x01h\x00\xe7\xff\x12?|A\xfd\x8c\xf3\xfe\xc7\x07\x12>\xfd\x85\xfe\xff\xf1\xce\xfa\xfe\x87\x07\x12\xf8\x04\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0'

TRACE +0.001 Full packet: b'\x01\x08\x02\x00\x07\x07\x12$@!'

TRACE +0.011 Full packet: b'\xf1\xcf\xe5\xff\xfe\xf9\xef\xfa\xfe\xe7\xe7\xba\xeb\xe5\xef\xff\xfd\xef\xfb\xfc\xff'

TRACE +0.000 Full packet: b'\xc8\x00\xff'

TRACE +0.001 Read invalid data: b'\x02\x00\x07\x07\x12$@!\xc0\xc0\xf1\xcf\xe5\xff\xfe\xf9\xef\xfa\xfe\xe7\xe7\xba\xeb\xe5\xef\xff\xfd\xef\xfb\xfc\xff\xc0\xc0\xc8\x00\xff\xc0\xff\xc0\xff\xf8\x02\x00\x07\x90 \x01\xfd\xc0\xc0\x01\x08\x02\x00\xff\xff\xfe \x01\xf5\xc0\xc0\x01h\x00\xe7\xff\x12?|A\xfd\x8c\xf3\xfe\xc7\x07\x12>\xfd\x85\xfe\xff\xf1\xce\xfa\xfe\x87\x07\x12\xf8\x04\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0'

TRACE +0.001 Remaining data in serial buffer: b'\xc0\x01\x08\x02\x00\x07\x07\x12"AE\xfe\xff\xde\x9f\xe6\xeb\xe5\xff\xf9\xcf\xfa\xff\xf7g\x9f\xbf\xfd\xe5\xff\xff\xe1\xf0\xc0\xff\xf8\xff\xff\xfc\xfe\xf0\xe0\xff\x1f\xfd\xc0\xf8\xf0\x90 \x01\xf7\xc0\xff\xe8\x03\xf8\xff\xff\xf2?\xf1\xe5\xff\xfe\xf9\x0f\x02\xf8\x07\x07\x1a\xbc\xfd\xe5\xff\xfe\xf1\x8e\xfa\xfe\xc7\xe7'

.TRACE +0.060 command op=0x08 data len=36 wait_response=1 timeout=0.100 data=b'\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU'

TRACE +0.000 Write 46 bytes: b'\xc0\x00\x08$\x00\x00\x00\x00\x00\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU\xc0'

TRACE +0.003 Read 20 bytes: b'\xf2\xfe\xe7\xc7\x9a\xbf\xf1\xe5\xfc\xc0\x01\x88\xf2\xfe\xe7\xe7\x13/\xe1\xf5'

TRACE +0.002 Read invalid data: b'\xf2\xfe\xe7\xc7\x9a\xbf\xf1\xe5\xfc\xc0\x01\x88\xf2\xfe\xe7\xe7\x13/\xe1\xf5'

TRACE +0.001 Remaining data in serial buffer: b':\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01'

.TRACE +0.062 command op=0x08 data len=36 wait_response=1 timeout=0.100 data=b'\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU'

TRACE +0.000 Write 46 bytes: b'\xc0\x00\x08$\x00\x00\x00\x00\x00\x07\x07\x12 UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU\xc0'

TRACE +0.002 Read 63 bytes: b'\x10\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x03\x88\xd0\xff\xff\xfd\x8e\xf3\xfc\xe7\xe7\x93?\xf9\xf9\xfe\xfd\xce\xfb\x07\xf7\xdb\xff'

TRACE +0.001 Read invalid data: b'\x10\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x02\x00\x07\x07\x12 \x01\x05\xc0\xc0\x01\x08\x03\x88\xd0\xff\xff\xfd\x8e\xf3\xfc\xe7\xe7\x93?\xf9\xf9\xfe\xfd\xce\xfb\x07\xf7\xdb\xff'

TRACE +0.000 Remaining data in serial buffer: b''

......

[Andy Maddick]

your device's USB port really is COM **5** , not com1, com2  etc?

Otherwise, I am not going to be online for a week..

I really thought 'power' / 'voltage' to first pin was only problem..

Looks like holding button down, device enters flash mode..
Have you tried a different circuit board this time ?

Starting to run out of ideas :(

You said you had garbage on serial output ?

[xMad]

Sure it's COM5.

I tried to flash with RasPi or Adapter on several sOnOff

It's looks like it's entering in something different that normal operation state since Green LED is not blinking.

But can't flash.

When i put esptool in --tracemode i have the above output. But can't understand it !

As it is serial what different --baut rates could I use ? Other parameters ?

Thanks for your time.

I will try this week to look at Phil solution (find another GPIO0)

Merci

[Andy Maddick]

Still no progress ?

[Oxyandy]

xMad you can not leave it hanging without a resolution..
Did you manage to flash ?

or

Have you stopped trying ?
Cheers
Andy

[Mateusz Karbowski]

Hello! My first post here and I am complete beginner. I hope that you will understand me bringing this topic up again. The problem is not solved. ;)

I have exactly the same device Sonoff RF R2 V1.0 with ESP8266 (Tasmota wiki on GitHub says "The R2 V1.0 version of the Sonoff RF uses an ESP8285" - not my case), the same problem, but a little bit more info.

When I am connecting to serial without button pressed, LED blinks - normal behaviour.

When I am connecting to serial with button pressed or K_P and GND shorted (procedure for Sonoff RF) LED is not blinking, and I can reach device with esptool:

~/Temp$ sudo esptool --port /dev/ttyUSB3 read_mac
esptool.py v2.1
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266
Enabling default SPI flash mode...
MAC: dc:4f:22:df:7b:23
Hard resetting...

But I can't perform read and write operations on flash:

~/Temp$ sudo esptool --port /dev/ttyUSB3 read_flash 0x00000 0x100000 sonoff-basic-stock.bin
esptool.py v2.1
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266
Enabling default SPI flash mode...

A fatal error occurred: ESP8266 ROM does not support function read_flash.

Any ideas?

[Phil]

Try nodemcuflasher??  though i would not hold my breath..  perhaps try holding the k-p gnd short a few seconds longer after startup?

I have flashed modules with esp8265 chips with tasmota (1 x bz01 21w led ceiling light, now discontinued.. and it died shortly after, due probably to my soldering to the chip legs) ..  and iirc some sv boards..

On Wednesday, 28 March 2018 14:34:57 UTC+1, xMad wrote:

Hi,

I can flash sOnOff TH16 on a Rasp Pi 3B with esptool.py  from arendst/Sonoff-Tasmota.

BUT

on a sOnOff Basic R2 V1.0 2017-10-11 I can't. Looks it don't enter in flash mode.

Do someone manage to flash on these ?

Thanks

[George Ioakimedes]

I actually keep GPIO0 grounded the whole time during flashing

[Mateusz Karbowski]

I have already tried to flash with button/K_P grounded constantly. Result is the same as with short hold.

I tried NodeMCU Flasher today. It detects chip model, but it doesn't show COM port on drop list. Same problem as with esptool i guess.

[Norbert Maier]

Hi!

I've just managed to flash the new board without soldering ... simply you need to press a second time the button leaving 2 sec pause between the two presses after connecting to USB .. it worked flawlessly.

[yasmine lahrir]

hello, I'm new in the group and in the sonoff system, I falashe my sonoff on tasmota without saving the original firmware !!! now i want to flash it on the original firmware, is it possible to send me the original firmaware? thank you group

[Laurentp]

Here it is :)

Laurent