SerialScope 0.0.3

A serial-port based oscilloscope

A serial port oscilloscope.

Install

$ pip install SerialScope --user    # just for you

or,

$ sudo -E pip install SerialScope   # for all users

After installation, launch it.

$ serialscope

Path ~/.local/bin should be in your PATH environment variable.

The default baud rate are serial port is 115200 and /dev/ttyACM0 respectively. You can change these values from command line

usage: serialscope [-h] [--port PORT] [--baudrate BAUDRATE]

Arduino NeuroScope.

optional arguments:
  -h, --help            show this help message and exit
  --port PORT, -p PORT  Serial port.
  --baudrate BAUDRATE, -B BAUDRATE
                        Baudrate of Arduino board.

Dependencies

• pyserial
• pysimplegui
• screeninfo (optional)

How it works

This oscilloscope has two channels. It assumes that 1 byte of data is sent for each channel. That means you have 255 levels. If you are using arduino board analog pins to read data, then your resolution would be 5/255 volts.

Arduino board

Function analogRead returns 10 bit value i.e., between 0 and 1023. You should scale it to 255, cast it to char before writing to serial port. You can use following snippets in your sketch.

Make sure that your arduino is set to use maximum possible baud-rate. I have used 115200 baud rate.,

// Two critical functions.
char intToChar( int val)
{
    // analogRead is 10 bits. Change it to 8 bits.
    char x = (char) (255.0 * val/1023.0);
    return x;
}

void write_data_line( )
{
    // channel A is on pin A0 and channel B is on A1
    char a = intToChar(analogRead(A0));
    char b = intToChar(analogRead(A1));
    Serial.print(a);
    Serial.print(b);
    Serial.flush();
}

CHANGELOG

• v0.0.1: Initial release