Thanks for the local header file. (LRDuinoGFX.h)
I had to install several libraries. Fortunately they were all available through the Library Manager.
I also had to install the Maple Core
The “code” that was pasted in #0 was seriously broken.
Fortunately your PasteBin link contained the code.
Yes, the sketch built for a Maple Mini with Roger’s Maple Core using your code from the PasteBin.
Using library Adafruit_SSD1306 at version 1.1.2 in folder: C:\Users\David Prentice\Documents\Arduino\libraries\Adafruit_SSD1306
Using library SPI at version 1.0 in folder: C:\Users\David Prentice\AppData\Local\Arduino15\packages\stm32duino\hardware\STM32F1\2018.5.11\libraries\SPI
Using library Adafruit_GFX_Library at version 1.2.3 in folder: C:\Users\David Prentice\Documents\Arduino\libraries\Adafruit_GFX_Library
Using library Adafruit_MAX31856_library at version 1.0.1 in folder: C:\Users\David Prentice\Documents\Arduino\libraries\Adafruit_MAX31856_library
Using library Adafruit_Unified_Sensor at version 1.0.2 in folder: C:\Users\David Prentice\Documents\Arduino\libraries\Adafruit_Unified_Sensor
Using library Adafruit_ADXL345 at version 1.0.0 in folder: C:\Users\David Prentice\Documents\Arduino\libraries\Adafruit_ADXL345
Using library Wire at version 1.0 in folder: C:\Users\David Prentice\AppData\Local\Arduino15\packages\stm32duino\hardware\STM32F1\2018.5.11\libraries\Wire
Sketch uses 48528 bytes (43%) of program storage space. Maximum is 110592 bytes.
I have no idea whether it works. I do not have your hardware.
Incidentally, it would not build with the ST Core. I had to change your Adafruit_MAX31856 object name from max to max56. Seriously, max is a very BAD name.
The ST Core did not like INPUT_ANALOG. I must investigate.
Porting a large-ish program from one target to another is fairly complex.
I suggest that you split into smaller tasks. e.g. test Adafruit_SSD1306 examples. test multiple objects.
Likewise, you test all your other libraries.
If you request help again, please can you make sure that you attach the necessary source files.
A bad “paste” in a CODE window is unwise ™.