variable heartBeat Codec for <HeartBeat>. Examples Build a <HeartBeat> element import { assertStringIncludes } from "@std/assert"; import { heartBeat } from "@hertzg/reolink-api/protocol/params"; const xml = heartBeat.encode({ sec: 1700000000, usec: 500 }); assertStringIncludes(xml, "<usec>500</usec>"); Type XmlParam<"HeartBeat", HeartBeat>