hottohts
Version:
TypeScript library for HottoH pellet stoves
100 lines • 3.75 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.Request = exports.CommandMode = exports.Command = void 0;
/**
* hottohts - Protocol request/packet builder for HottoH stoves
*
* Handles CRC, packet formatting, and protocol details for all commands.
* Ported 1:1 from Hottohpy for protocol compatibility.
*
* @module request
*/
const crc = __importStar(require("crc"));
var Command;
(function (Command) {
Command["DAT"] = "DAT";
})(Command || (exports.Command = Command = {}));
var CommandMode;
(function (CommandMode) {
CommandMode["READ"] = "R";
CommandMode["WRITE"] = "W";
CommandMode["EXECUTE"] = "E";
})(CommandMode || (exports.CommandMode = CommandMode = {}));
/**
* Build and encode a protocol request for the HottoH stove.
*/
class Request {
constructor(command = Command.DAT, mode = CommandMode.READ, parameters = ["0"], id = 0) {
this.request = "";
this.command = command;
this.mode = mode;
this.parameters = parameters;
this.id = id;
this._buildRawPacket();
}
_buildRawPacket() {
// Python: strSocketId = str(0).zfill(5)
// TypeScript: always use 0 for socket id for parity
const strSocketId = '00000';
const strRawData = this._getRawData();
const strData = `${strSocketId}C---${strRawData}`;
const strCrc = this._getCrc(strData);
this.request = `#${strData}${strCrc}\n`;
}
_getRawData() {
// Python: lenParameters = f"{len(self._getParameters()):0>4X}"
// TypeScript: getParameters().length, pad to 4 hex digits
const paramString = this._getParameters();
const lenParameters = paramString.length.toString(16).toUpperCase().padStart(4, '0');
return `${lenParameters}${this.command}${this.mode}${paramString}`;
}
_getParameters() {
return this.parameters.join(';') + ";";
}
_getCrc(message) {
// Python: crc-ccitt-false, which is crc16ccitt in npm 'crc'
const crcValue = crc.crc16ccitt(Buffer.from(message, 'utf-8'));
return crcValue.toString(16).toUpperCase().padStart(4, '0');
}
/**
* Get the encoded request as a Buffer for TCP transmission.
*/
getRequest() {
return Buffer.from(this.request, 'utf-8');
}
}
exports.Request = Request;
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