WEMOS D1 mini Pro - 16M supporting

[4refr0nt]

Hardware

Hardware: WEMOS D1 mini Pro - 16M

What's new with D1 mini Pro

• 16M bytes (128M bit) Flash
• External antenna connector
• Built-in ceramic antenna
• New CP2104 USB-TO-UART IC
• Same size as D1 mini, but more light

View D1 mini Pro on WeMos Aliexpress store

[WereCatf]

This is not an issue and this is not the place to advertise your affiliate-links.

[TotallyInformation]

Hi, I've got 2 of these now and would like to understand how to update the boards.txt to make use of the 16M memory?

Not as simple as I'd hoped. I'm guessing that these are a copy of the D1 Mini but with the larger FLASH chips attached.

[WereCatf]

@TotallyInformation It'd be best to make a proper variant out of it. I can take a stab at it in a few hours.

[TotallyInformation]

Fab, thanks WereCatf.

https://www.wemos.cc/product/d1-mini-pro.html

[WereCatf]

@TotallyInformation Okay, copy https://github.com/WereCatf/Arduino/blob/WemosD1MiniPro/boards.txt over your existing one and that should be it. I do not have one of these boards, so I can't actually verify that it works, so it would be nice if you'd chime back here if it works as it should.

[pieman64]

@WereCatf I have some of the Pro's and did some manual adjustments to boards.txt. Am I right in thinking we still can't access the memory from 4M to 16M?

[WereCatf]

@pieman64 I don't know, I ain't got any 16MB-boards. If you've got the pros then you could just try.

[wfraga18]

why WEMOS never answer the forum questions ?? launch a product, but don't have support !

HOW TO USE 16MB ???

[WereCatf]

@wfraga18 Ask them, not us. We don't work for Wemos. As for using it: how about you actually read the replies here, instead of raging? I provided a new boards.txt above you can try.

[TotallyInformation]

Thanks @WereCatf, I'm at a conference for a few days, I'll try after that. Good work.

[4refr0nt]

@WereCatf, I'm try flash one of examples to Wemos D1 mini Pro with new boards.txt without any issues (spiffs not tested)

[martinayotte]

I've received my Mini Pro today. The sketch is running fine with 16MB settings, but SPIFFS and OTA becomes broken. It is not broken if I switch back to 4MB settings.
So, for now, I think the additional free Flash is only usable using direct calls to Esp.flashWrite() and Esp.flashRead(), although I didn't try it yet ...

EDIT : I think using Esp.flashWrite() and Esp.flashRead() as is won't work either, but doable if hacked with the following method :
http://www.packom.org/esp8266/16mb/flash/eeprom/2016/10/14/esp8266-16mbyte-flash_handling.html

[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.

[pbecchi]

Any update on over 4 mB support?
I read that should be included in next Arduino Code release 2.4!
It is already supported by the GitHub version?

[martinayotte]

Take a look at #2351 (comment)
Of course, you need to tweak Arduino code to get those hacks merged manually.