Here are some apps that you can flash to your Carloop and use as example to build your own apps.
Code Reader

Reads engine diagnostic trouble codes and outputs them directly to the browser.
CAN Analyzer

Turn your Carloop into a SocketCAN device compatible with the can-utils analysis tools.
VIN Reader

Reads the Vehicle Identification Number (VIN) and prints it in the browser.
Visualize Car Data

Step-by-step project to find out what data is available in your car and publish it to your smartphone in the Blynk app.
Transmit CAN message

Shows how to transmit a single CAN message at a regular period.