> For the complete documentation index, see [llms.txt](https://docs.macchina.cc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.macchina.cc/projects/p1-projects/p1-can-vehicle-data.md).

# P1 CAN Vehicle Data

#### Items Used

* 1x [P1](https://www.macchina.cc/catalog/p1-boards/p1-under-dash)
* 1x Car with OBD-II port

#### Download P1 Vehicle Data Python Program

After connecting to P1 via SSH, run the command below to download the python program and save it to \~/scripts. (If using putty to SSH, just right click to paste!)

```
wget -P ~/scripts https://gist.githubusercontent.com/kenny-macchina/cf47daf663f9091460fc3454f5e38de9/raw/676f2a36f300fa8e5c9c43c05a7bc18af2479b5c/p1_data.py
```

![Downloading the python program](/files/-MBdsXg6Y2fBvKroH5dG)

#### Install Pip

Run the commands below to install the "Pip" package manager and reboot.

```
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py
sudo reboot now
```

![Installing Pip, curl and reboot not shown.](/files/-MBeBM6Egbq-GPjrOMCY)

#### Install Python-CAN Library

Run the commands below to install the python-can library and reboot.

```
pip install python-can
sudo reboot now
```

![Installing python-can, reboot not shown.](/files/-MBeBClG2gqUeVufii_3)

#### Collecting Data

First, start your car, then plug P1 into the OBD-II port and run the data collection program using the command below. (Make sure you're in the home directory beforehand by running the command "cd".) P1 will prompt for a password as the program sets up the CAN0 bus. After entering the password data collection will begin until the program is halted by pressing CTRL-C.

```
python scripts/p1_data.py
```

![Terminal while data collection is running](/files/-MBeFexvWZz3AKtqF_30)

#### Retrieving Data

To download the CSV file from P1, the command below can be used to host an HTTP server on the port specified, this can then be visited in a web browser (from a computer on the same LAN) and the file(s) downloaded.

```
python3 -m http.server 1337
```

![Hosting the HTTP server](/files/-MBeFvlVRh_WMpX2d0vJ)

![Retrieving the file from a browser](/files/-MBeG7bEBQ8mB-Rmc2_8)

#### Example Results

![Vehicle and engine speed for a short drive around the block](/files/-MBeNJTbNzjnbtIppcuA)

![Coolant temperature from the same test drive](/files/-MBeNMyQnUQ6wm6aYnjJ)