MicroPython Forum (Archive)

I am on Sunshine Coast just north of Brisbane.

The Ardunio community is also building a small form factor STM32F405 board in same form factor as the famous blue Pill (stm32f103c8t6) here is a pic of it https://ibb.co/m512be. They have https://robotdyn.com/ to manufacture it for them but they r wanting a very noise free ADC so r still in the testing stage of the ADC and I am not sure when/if it will ever be available. They are aiming for $10US plus postage price range.

A STM32F405 offers a lot more then the STM32f103 but all the cheap STM32F405 boards don't have the same form factor. I have a STM32F407VET that I prototype on but it is a very big for a robot control board.

I am keen to get one of the nano's on this thread if the postage isn't a killer on the price.

I have also made a STM32F405 board, it is bigger then pyb nano.
https://item.taobao.com/item.htm?id=570903196977

And I plan to design a new board, with very small size and lower cost, no onboard SD socket, no accelerometer.

I am really interested in the super small form factor STM32F405RG. On Aliexpress you can buy a much larger very fully featured STMF407VET for under $10US see https://www.aliexpress.com/wholesale?ca ... 32f407vet6

Maybe you should check out the design the Ardunio guys have been working on as they have designed a STM3232F405RG board same size and pin compatible as a blue-pill with a SD card slot on the bottom of the board and then 4 solder pads for the remaining pins that didn't fit on the bread board breakout being pin compatible with blue pill. see the super long thread http://www.stm32duino.com/viewtopic.php?f=19&t=2633

I would like to buy a few of these, but taobao is a show-stopper for me.

Why not put it on tindie, or ebay or some place that is more accessible to those of us not located in China.

https://www.taobao.com/go/chn/transit/index.php

It is not easy for me to ship outside China, is somebody can help?

I have one of your pub nano boards. My boot.py and main.py files got corrupted. By any chance, do you still have a copy of these files?

Kind regards,
-Kirk Franks

[quote=shaoziyang post_id=14698 time=1476241969 user_id=1625]
My new PYB Nano board is coming, I am testing it now.

[b]main feature:[/b]

[list]
[*]STM32F401CEU6 microcontroller
[*]2 uart
[*]3 I2C
[*]3 SPI
[*]10 ADC input
[*]RTC
[*]battery input
[*]one user button and one RESET button
[*]4 user LED, with intensity function support
[*]with MMA7660 sensor
[*]usb power or external power (12V input maximum)
[*]low cost
[*]very small[/list]

01.jpg

02.jpg

03.jpg
[/quote]

Just do factory reset to restore files. Please remember eject the disk before disconnect usb.

http://docs.micropython.org/en/latest/p ... tory-reset

Yes TAOBAO is very complicated for non-chine.
You have to find a way to put in Aliexpress, otherwise the number of customers will be very limited.
I really want to buy your product and maybe use it in my commercial projects, however it has to be in a channel that I can buy.
For me who live in Brazil, Aliexpress is the best.

Is PYB NANO better than an ESP32?

Thank you for your help. I wasn't aware these can be restored like that.

Kind regards,
-Kirk

shaoziyang wrote: ↑

Wed Jul 31, 2019 1:53 am

Just do factory reset to restore files. Please remember eject the disk before disconnect usb.

http://docs.micropython.org/en/latest/p ... tory-reset