Vehicle data

Hyundai Bayon vehicle data API: signals, model years and connection options

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DIMO gives developers API access to Hyundai Bayon vehicle data. Model years 2023 and newer connect with a DIMO device (AutoPi). Headline signals include odometer, fuel percentage and vehicle speed.

DIMO gives developers API access to vehicle-state data: diagnostics, fault codes, battery and fuel health, odometer, and maintenance signals. For the Hyundai Bayon, that data comes through a DIMO device on model years 2023 and newer, and this coverage has been tested rather than only expected. Vehicle owners consent to and control sharing, so builders get data with clear provenance. DIMO adds vehicle-state depth on top of GPS tracking; it doesn't replace it.

Signals by connection type

DIMO device — AutoPi (2023 and newer)

SignalDIMO nameUnit
OdometerpowertrainTransmissionTravelledDistancekm
Fuel PercentagepowertrainFuelSystemRelativeLevel%
Vehicle Speedspeedkm/h
Engine RPMpowertrainCombustionEngineSpeedrpm
Coolant TemperaturepowertrainCombustionEngineECT°C
Air TemperatureexteriorAirTemperature°C
Barometric PressureobdBarometricPressurekPa
Distance Since DTC ClearobdDistanceSinceDTCClearkm
Distance with MIL OnobdDistanceWithMILkm
Engine LoadobdEngineLoad%
Engine runtimeobdRunTimeseconds
Intake temperatureobdIntakeTemp°C
Long Term Fuel Trim (Bank 1)obdLongTermFuelTrim1%
Low Voltage BatterylowVoltageBatteryCurrentVoltagevolts
Manifold Absolute PressureobdMAPkPa
Short Term Fuel Trim (Bank 1)obdShortTermFuelTrim1%
Throttle PositionpowertrainCombustionEngineTPS%
Warmups Since DTC ClearobdWarmupsSinceDTCClear—
Altitude LevelcurrentLocationAltitudem
CoordinatescurrentLocationCoordinates—

No factory connectivity?

Hyundai Bayon model years 2023 and newer have no OEM cloud connection listed. For these years, a DIMO device (AutoPi) plugs into the OBD-II port and streams vehicle signals once the owner connects it and consents to sharing.

See the developer quickstart for how owners connect vehicles and grant access.

Events available

  • Idling
  • Refuel

Build it

Query the latest Hyundai Bayon signals with the DIMO TypeScript SDK. The vehicle owner must first share access with your app through DIMO Connect.

import { DIMO } from '@dimo-network/data-sdk';


const dimo = new DIMO('Production');
const tokenId = Number(process.env.DIMO_TOKEN_ID); // from DIMO Connect


const developerJwt = await dimo.auth.getDeveloperJwt({
  client_id: process.env.DIMO_CLIENT_ID,
  domain: process.env.DIMO_REDIRECT_URI,
  private_key: process.env.DIMO_API_KEY,
});
const vehicleJwt = await dimo.tokenexchange.getVehicleJwt({
  ...developerJwt,
  tokenId,
});


// Latest Hyundai Bayon signals
const data = await dimo.telemetry.query({
  ...vehicleJwt,
  query: `
    query {
      signalsLatest(tokenId: ${tokenId}) {
      powertrainTransmissionTravelledDistance {
        value
        timestamp
      }
      powertrainFuelSystemRelativeLevel {
        value
        timestamp
      }
      speed {
        value
        timestamp
      }
      }
    }`,
});
console.log(JSON.stringify(data, null, 2));

Full walkthrough: Developer quickstart.

FAQ

Can I read fuel level remotely on a Hyundai Bayon?

Yes, with a DIMO device, which reports Fuel Percentage as the powertrainFuelSystemRelativeLevel signal. Once the owner shares the vehicle, exchange your Developer JWT for a Vehicle JWT and query the signal through the Telemetry API.

How do I track a Hyundai Bayon with no connected services?

Use a DIMO device. After the owner shares the vehicle with your Developer License, request a Vehicle JWT from the Token Exchange API and use it with the Telemetry API to read the vehicle's data.

How do I detect idling on a Hyundai Bayon?

Query the segments resource in the Telemetry API with the idling mechanism, which requires a DIMO device. Segments are contiguous periods where engine RPM stays in the idle range, and you can adjust the upper bound with maxIdleRpm (default 1000).

How do I detect refuel events on a Hyundai Bayon?

Query segments with the refuel mechanism, which detects where fuel level rises significantly. The minIncreasePercent setting controls the minimum rise, with a default of 15 percent.

How do I verify Hyundai Bayon mileage?

The DIMO device reports the odometer signal. To get verifiable proof of it, call the Attestation API odometer-statement endpoint with a Vehicle JWT, then retrieve the resulting credential through the Telemetry API.

Which Hyundai Bayon model years work with DIMO?

DIMO devices have been seen working on Hyundai Bayon model years 2023 and newer. For older vehicles, contact DIMO for additional support.

Do I need hardware to get Hyundai Bayon data?

Yes. DIMO lists no OEM cloud connection for the Hyundai Bayon, so data comes from a DIMO device.

Source: DIMO vehicle compatibility records. Coverage tested on a connected vehicle. Last verified .