# MAPID – Malte's Arduino-Powered Info Display

Info display powered by two parts:

1. Command line OS running on Arduino (MAPID/CP)
2. Python pyserial script controlling the display over a serial connection

## Requirements

- Arduino libraries
   - [SerialCommand Advanced](https://github.com/shyd/Arduino-SerialCommand)
   - [serLCD](http://playground.arduino.cc/Code/SerLCD)
     *Note: This is not the official library, but an old one found on the legacy Arduino Playground!*
- Python libraries
   - pyserial
   - python-dotenv

## Configuration

MAPID is configured using a dotenv file. Currently you have to set three options:

`SERIAL_DEV`
: Serial device file. `/dev/ttyUSB\*` on Linux, `/dev/cu.usbserial-*` on macOS.

`SERIAL_SPEED`
: Speed (in Baud) of the serial connection. `9600` is the default value of the Arduino Sketch.

`FIFO`
: File name for the FIFO. Note that systemd uses a private `/tmp` for services, so the Web-UI cannot access these files, and you have to use a different location.

An example file for GNU/Linux:

```sh
# Serial device
SERIAL_DEV="/dev/ttyUSB0"

# Serial baud rate
SERIAL_SPEED=9600

# FIFO filename
FIFO="/var/mapid/fifo"
```

## Components

### `MAPID-CP/`

An Arduino sketch containing the command line os *MAPID/CP* (CP=Control Program). It supports some commands to control a LCD and a LED (there are even a few more non-relevant ones):

- Turn the LED on/off: `ON`/`OFF`
- Turn the display on/off: `LCDON`/`LCDOFF`
- Select a line for output: `LINE i`
- Display some text: `ECHO Foo bar`
- Clear the display: `CLS`

### `mapid.py`

A Python library used by the other scripts

### `mapid-count.py`

Displays a fake bomb countdown like in one of those action movies. Written as a first test for Pyserial communication with *MAPID/CP*.

### `fifo_bridge.py`

A Python script that provides a FIFO file to pass commands to *MAPID/CP*. Each line read from that file is directly passed over a serial connection.

### `fifo-webui/`

PHP based Web interface for `fifo_bridge.py` supporting all commands of *MAPID/CP* (except for those without a real purpose, that only return some information relevant for interactive serial connections).

### `notification.sh`

Use the LED and display to show a notification, the purpose of the whole MAPID project.