@icoms-detection/server-esp32/dist/Device.js

This is the OFFICIAL SERVER library created by Icoms Detection to run their apps.

"use strict";
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var __generator = (this && this.__generator) || function (thisArg, body) {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.Device = void 0;
var stream_1 = require("stream");
var Util_1 = require("./Util");
/**
 * This function represent an interface of a Device
 * You are allowed to send commands on a specific UART port
 *
 * @param uartConfiguration is a parameter who specify the UART configuration
 * @returns
 */
var Device = function (uartConfiguration) {
    if (uartConfiguration === void 0) { uartConfiguration = {
        baud: 115200,
        pinRX: 32,
        pinTX: 27,
    }; }
    var uart;
    if (Util_1.isOnEsp32) {
        uart = require("uart");
    }
    var icomsBusUART;
    var sending = false;
    /**
     * Array of commands to execute
     */
    var commands = [];
    /**
     * Close the last UART connection and open a new one
     * @returns a new UART object
     */
    var getIcomsBusUART = function () {
        if (icomsBusUART && !icomsBusUART.destroyed)
            icomsBusUART.destroy();
        if (!Util_1.isOnEsp32) {
            return (icomsBusUART = new stream_1.PassThrough());
        }
        return (icomsBusUART = new uart.UART(uartConfiguration));
    };
    /**
     * If commands > 0 call writeOnUART with the next command
     * @returns
     */
    var fetchNext = function () {
        if (commands.length !== 0)
            writeOnUART(commands.shift());
    };
    /**
     * Send a command to a device using UART protocol.
     * Read the response and merge into one buffer sent throught a stream when validatation return true or timed out
     * @param command object with information about the current command to send
     */
    var writeOnUART = function (command) { return __awaiter(void 0, void 0, void 0, function () {
        var buffers, icomsUART, validationPromise, timeoutPromise;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    sending = true;
                    buffers = [];
                    icomsUART = getIcomsBusUART();
                    validationPromise = new Promise(function (resolve) {
                        icomsUART.on("data", function (buff) {
                            buffers.push(buff);
                            if (command.validation(Buffer.concat(buffers)))
                                resolve(true);
                        });
                    });
                    timeoutPromise = new Promise(function (resolve) { return setTimeout(resolve, command.timeout); });
                    icomsUART.write(command.cmd);
                    return [4 /*yield*/, Promise.race([validationPromise, timeoutPromise])];
                case 1:
                    _a.sent();
                    command.stream.push(Buffer.concat(buffers));
                    command.stream.end();
                    sending = false;
                    fetchNext();
                    return [2 /*return*/];
            }
        });
    }); };
    /**
     * Add a command to the waiting array of commands
     * @param command object with information about a command to send
     */
    var sendCommand = function (command) {
        commands.push(command);
        if (!sending)
            fetchNext();
    };
    return {
        sendCommand: sendCommand,
    };
};
exports.Device = Device;
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