Besides using CAN or LIN, V-Link is capable of showing analog data from 3rd party sensors.

Introduction

Using an ADC interface with V-Link is straightforward, especially when you have the V-Link HAT. If you don’t have the HAT, you will need to connect an analog-to-digital converter to the I2C bus on GPIO 2 and 3. V-Link can support up to 4 different sensors. The HAT has a dedicated jumper that lets you convert one of the inputs to an input for an NTC thermistor.

JSON File Configuration

You can configure the ADC integration in V-Link using the file /v-link/backend/adc.json.

Sensors

Here, you can define the parameters you want the app to retrieve/intercept from the ADC interface. You can add up to 4 sensors using the template given below.

"sensors": {
        "pressure": {
            "app_id": "oilp",
            "label": "Oil Pressure",
            "unit": "kPa",
            "min_value": 0,
            "max_value": 1000,
            "limit_start": 3000,
            "ntc": false,
            "channel": "P1",
            "characteristic": {
                "0.5": 0,
                "4.5": 1000
            }
        },
}

min_value / max_value

• Define the minimum / maximum value to be displayed in the app.

limit_start

• Define the start of the redline.

ntc

• If you are connecting an NTC set this to true. NTC is supported on channel P0 / AN1.

characteristics

• Provided through the sensor datasheet. In this example, 0.5V refers to 0 psi and 4.5V refers to 1000 psi.