rxjs-obd/lib/operators/oxygenSensorSTFT.js

RxJS Implementation for OBD (On Board Diagnostics) of vehicles via ELM 327 connections.

import { OBDOuterSubscriber } from '../model/OBDOuterSubscriber';
export function oxygenSensorSTFT(sensor) {
    return function (source) {
        return source.lift(new OxygenSensorSTFTOperator(sensor));
    };
}
class OxygenSensorSTFTOperator {
    constructor(sensor) {
        this.sensor = sensor;
    }
    call(subscriber, source) {
        return source.subscribe(new OxygenSensorSTFTSubscriber(subscriber, this.sensor));
    }
}
class OxygenSensorSTFTSubscriber extends OBDOuterSubscriber {
    constructor(destination, sensor) {
        super(destination);
        this.sensor = sensor;
    }
    /**
     * Return the frequency of execution of this command.
     * @return that this command must be executed every pulse.
     */
    pulse() {
        return 1;
    }
    /**
     * Return the string representation of the OBD Read command.
     * @returns the string representation of the OBD Read command
     */
    command() {
        return `01 ${['14', '15', '16', '17', '18', '19', '1A', '1B'][this.sensor - 1]} 1\r`;
    }
    /**
     * Return the name of the OBD Field on OBD Data object.
     * @returns the name of the OBD Field on OBD Data object.
     */
    field() {
        return [`oxygenSensorVoltage${this.sensor}`, `oxygenSensorShortTermFuelTrim${this.sensor}`];
    }
    /**
     * Parse the OBD response.
     * @param bytes the response read from OBD.
     * @returns the parsed response.
     */
    parse(bytes) {
        return [parseInt(bytes[2], 16) / 200, (parseInt(bytes[3], 16) * 1.28) - 100];
    }
}
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