modbus-connect/utils/getSerialPorts.js

Modbus RTU over Web Serial and Node.js SerialPort

// utils/getSerialPorts.js

async function getSerialPorts(transport, option = {}) {
    if (transport === 'node') {
        const { SerialPort } = await import('serialport');
        const ports = await SerialPort.list();
        const { vendorId } = option;

        if (vendorId !== undefined) {
            return ports
                .filter(port => port.vendorId?.toLowerCase() === vendorId.toLowerCase())
                .map(port => ({
                    path: port.path,
                    vendorId: port.vendorId?.toLowerCase(),
                    productId: port.productId?.toLowerCase(),
                    serialNumber: port.serialNumber,
                    port
                }));
        }

        return ports
            .filter(port => port.vendorId !== undefined)
            .map(port => ({
                path: port.path,
                vendorId: port.vendorId?.toLowerCase(),
                productId: port.productId?.toLowerCase(),
                serialNumber: port.serialNumber,
                port
            }));
    }

    if (transport === 'web') {
        if (!navigator?.serial) {
            throw new Error('Web Serial API is not supported in this environment');
        }

        const { vendorId, requestNewPort = false } = option;
        let ports = [];

        if (requestNewPort) {
            try {
                const newPort = await navigator.serial.requestPort({
                    filters: vendorId ? [{ usbVendorId: parseInt(vendorId, 16) }] : []
                });
                ports.push(newPort);
            } catch (err) {
                console.warn('User cancelled port request or it failed:', err);
                return [];
            }
        } else {
            ports = await navigator.serial.getPorts();
        }

        const results = [];

        for (const port of ports) {
            const { usbVendorId, usbProductId } = port.getInfo();

            // Игнорируем порты без vendorId
            if (usbVendorId === undefined) continue;

            const hexVendorId = usbVendorId.toString(16).padStart(4, '0').toLowerCase();
            const hexProductId = usbProductId?.toString(16).padStart(4, '0').toLowerCase();

            // Фильтрация по переданному vendorId
            if (vendorId && hexVendorId !== vendorId.toLowerCase()) {
                continue;
            }

            results.push({
                port,
                vendorId: hexVendorId,
                productId: hexProductId
            });
        }

        return results;
    }

    throw new Error(`Unknown transport type: ${transport}`);
}

module.exports = { getSerialPorts }