rxjs-obd
Version:
RxJS Implementation for OBD (On Board Diagnostics) of vehicles via ELM 327 connections.
50 lines • 1.51 kB
JavaScript
import { OBDOuterSubscriber } from '../../model/OBDOuterSubscriber';
export function supportedPIDs(pid = '00') {
return function (source) {
return source.lift(new SupportedPIDsOperator(pid));
};
}
class SupportedPIDsOperator {
constructor(pid) {
this.pid = pid;
}
call(subscriber, source) {
return source.subscribe(new SupportedPIDsSubscriber(subscriber, this.pid));
}
}
class SupportedPIDsSubscriber extends OBDOuterSubscriber {
constructor(destination, pid) {
super(destination);
this.pid = pid;
}
/**
* 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 ${this.pid} 1\r`;
}
/**
* Return the name of the OBD Field on OBD Data object.
* @returns the name of the OBD Field on OBD Data object.
*/
field() {
return `supportedPIDs.segment${this.pid}`;
}
/**
* Parse the OBD response.
* @param bytes the response read from OBD.
* @returns the parsed response.
*/
parse(bytes) {
return parseInt(bytes[2], 16) + (parseInt(bytes[3], 16) * 256) + (parseInt(bytes[3], 16) * 65536) + (parseInt(bytes[3], 16) * 16777216);
}
}
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