Add WeMos D1 mini pro

[ordonot]

Please add support for WeMos D1 mini pro (16 MBytes)
https://www.wemos.cc/product/d1-mini-pro.html

(Moved my wish on behalf of ivankravets from platformio/platformio-core#798 - hope I got the right place now.)

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[ivankravets]

I don't see this board here https://github.com/esp8266/Arduino/blob/master/boards.txt

Is the only 1 difference Flash size?

[ordonot]

Yes, but seems to be the first one with SPIFFS >4MBytes so esptool needs an update too.
esp8266/Arduino#2323
esp8266/Arduino#2351

[mcauser]

Waiting on this: esp8266/Arduino#2550

[adrianmihalko]

Guys, any update on this?

[martinayotte]

Using the hack details here http://www.packom.org/esp8266/16mb/flash/eeprom/2016/10/14/esp8266-16mbyte-flash_handling.html, I was able to get SPIFFS working on 16MB, but there still issues : SDK still try to access WiFi configs like 4MB, so I had to move SPIFFS_START after the first 4MB, with 12MB remaining. Also, I still face issue with OTA, when e-boot is call, I get "need boot 1.4+", and hangs forever until doing a erase_flash with esptool.py.

[ivankravets]

Does it work in Arduino IDE?

[mark-hahn]

Bump. I just got my D1 mini pros and I need the extra file space on my product. Anything I can do to help?

[martinayotte]

As mentioned earlier, the hack provided in http://www.packom.org/esp8266/16mb/flash/eeprom/2016/10/14/esp8266-16mbyte-flash_handling.html is the way to go.

[mark-hahn]

Thanks for the reply.

I tried accessing SpiFlashChip but platformIO doesn't have the library. What library should I use? His routines would get me the ability to write and read the flash but only in a way like the EEProm which isn't very useful.

Secondly, it's kind of hard to call it a workaround when the upload tools and the file system don't work. I saw the reply that had some kludges for the FS but I didn't understand what he was suggesting.

[martinayotte]

I'm only play a bit with PlateformIO, I'm still using plain ArduinoESP framework.
But PlateformIO has a copy of this framework, so it has also the SPIFFS there too.
The changes needed should be done in Esp.cpp, where there are method EspClass::flashEraseSector()/EspClass::flashWrite()/EspClass::flashRead().
The hack mentioned above should be done in this file. Then, you will still use normal upload tools like before with 4M, but you also have to change LD script so that _SPIFFS_start is equal to 0x40600000 instead of 0x40300000 to avoid that WiFi configs settings been in the middle of SPIFFS. This hack will give 12MB available in SPIFFS.
The only pitfall is that OTA isn't working anymore, I will have to dig a bit more when I get chance :
To fix that issue, _SPIFFS_start need to be dynamically reverted to 0x40300000 when OTA is done.

[mark-hahn]

Thanks, I'm keeping this information. However it is a messy fix and also I need OTA. I can wait a while for a simple solution.

[valtersitz]

Hi everybody,

First thank you for developping such useful tools for the ESP!
I am currently working on the ESP WEMOS D1 mini pro and I have difficulties uploading my code on it (same as you I guess). I took a look at the hack solution but I need the OTA and SPIFFs to both work for my project. As any improvment been released since January? If not do you have an idea of when it will be out? Should I look for an other solution in the meantime?
I am novice with Platform.io and my project includes js, css and py files.

Thank you in advance,
Val

[martinayotte]

You can still use the Pro 16MB as a simple 4MB in the mean time we found a fix for having full usage of the 16MB, it still give you pretty much space.

[mark-hahn]

in the mean time we found a fix

Did you mean that you have a fix now, or to wait until you find a fix?

[martinayotte]

As mentioned above in January, there is a hack to use the above 12MB in SPIFFS, but it make OTA becomes broken until we found another hack to fix the OTA issue. If you use the 16MB as a simple 4GB, there is no issue other than loosing the above 12MB.