Software

Core:STM32

32-bit microcontrollers based on the Arm® Cortex®-M processor

Platform: Arduino IDE with STM32duino library

The Arduino integrated development environment (IDE) is a cross-platform application (for Microsoft Windows, macOS, and Linux).

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To download Arduino: https://www.arduino.cc/en/software

Introduction: Firmware programming is based on STM32duino, which enables us to program it directly on Arduino IDE. It reduces the difficulty for beginners to write hardware code for STM32.

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Wiki: https://github.com/stm32duino/wiki/wiki
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Getting Start: https://github.com/stm32duino/wiki/wiki/Getting-Started

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Please strictly follow the web page to install the required library

Firmware (The final vision will be provided later)

Download the program by click icon

Arduino

Under Tools selection , pick correct settings:

set Board to Generic STM32F1 series
set Board part number to Generic F103C8Tx
set U(S)ART support to Enabled (generic 'Serial')
set USP speed to Low\Full Speed
set Optimize to Smallest(-Os default)
set C Runtime Library tp Newlib Nano (default)
set Upload method is STM32CubeProgrammer(Serial)

We highlight uploading switch in our PCB layout.

Before you upload your program, make sure these are already done:

Use jumper to connect BOOT1 to GND
Use another jumper to connect VCC to BOOT0
Connect USB-B to computer
Press the Botton

After finish uploading:

Disconnect the jumper between VCC and BOOT0
Use jumper to connect BOOT0 and GND

If you dont follow these two steps after uploading, the firmware will be erased.

Instruction Table

This table contains all instructions that you can use to directly control the OpenPneu.
You can send instructions through Arduino IDE, Python or any other programing language which can support serial communication.

Instruction	Reply	Functionality
AT	OK	Check Connection
AT+ADD	ADD=XX	Check Device Address
AT+SADD=XX	SADD=XX	Modify Device Address
PREAD=XX	Val=xx	Pressure of Channel XX: xx kPa
VON=XX	OK	Set Valve xx to High
VOFF=XX	OK	Set Valve xx to Low
PSPEED=XX,YY	OK	Set Channel XX Flow Rate to YY
CON=XX	ON	Enable PID Control on Channel XX
CON:ALL	ALL ON	Enable PID Control on all channels
COFF=XX	OFF	Disable PID Control on Channel XX
COFF:ALL	ALL OFF	Disable PID Control on all Channels
PSET=XX,YY	XX=YY	Set Target on Channel XX to YY kPa
PSET:X,X,...,X;	OK	Update Target Pressure on All Channels
AT+RST	OK	Reset All

Graphical user interface (The final vision will be provided later)

Download the Surface interface (UI) in python code by click icon

you may need to download pyqt5 before using this code.

Type: "python main.py" in command window under same address with UI to open the User Interface.
Follow the step from figure, you can simplly start the system and set target pressure on different channel under Target Pressure Adjustment.

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Here is how the UI look like