Ben Lye

That's a C8. The B has a single straight line down the left hand edge. Your best option is to return it as it is not what they claim it...

For comparison, here's a photo of the STM32F103CB in my IRX4 module. Once you know what they look like, the 8 and the B become easier to distinguish. 

> Yes it's small, and I'll probably bust it, but I guess it's my best chance. It will save me from going mad with BG support. It's probably easier to...

The USB port won't work until you flash the bootloader. You need to do that with a USB-to-serial adapter. Once you hook the adapter up you also need to bridge...

Sure, I can look into it. I think the main reason we've stuck with the current toolchain is the bad experience from a few years ago when an upstream core...

@smaller09 what made you pick that specific version of the compiler? Also, how did you install it? Did it come with another board/package or did you install it manually? I'm...

> gcc will complain about duplicate inline. what I have done was just remove that inlines just like [https://github.com/rogerclarkmelbourne/Arduino_STM32/pull/551](url) Can you explain how you removed the inlines? If your code...

So you manually installed the 8.3.1 compiler and linked it? I was hoping you had installed some other Arduino IDE package that had installed it and I could grab their...

OK. Need to look at the inline thing in more detail because the compiler generates a lot of warnings about it now. ``` :\Users\blye\AppData\Local\Arduino15\packages\multi4in1-devel\hardware\STM32F1\1.3.0\system/libmaple/stm32f1/include/series/gpio.h:487:29: warning: always_inline function might not be...

Once you can get to it, if you add this as an additional board URL you can install the devel board package. 1.3.0 uses the new gcc compiler ``` https://raw.githubusercontent.com/pascallanger/DIY-Multiprotocol-TX-Module-Boards/devel/source/package_multi_4in1_board_devel_index.json...