async function main(args) {

    // token configurable desde args o desde configuración
    const token = args._token;


    const inputString = args.inputString;

    if (!inputString) {
        return { status: "error", message: "Por favor, ingresa una cadena de texto." };
    }

    let outputValue;
    
    switch (inputString.toLowerCase()) {
        case "uno":
            outputValue = 10;
            break;
        case "dos":
            outputValue = 20;
            break;
        case "tres":
            outputValue = 30;
            break;
        default:
            return {
                status: "error",
                message: `Cadena no reconocida: "${inputString}". Solo 'uno', 'dos' o 'tres'.`
            };
    }

    // Enviar a Ubidots
    const device = "tension-real-calibracion";
    const variable = "prueba";

    const url = `https://industrial.api.ubidots.com/api/v1.6/devices/${device}`;
    
    const body = {};
    body[variable] = outputValue;

    const res = await fetch(url, {
        method: "POST",
        headers: {
            "X-Auth-Token": token,
            "Content-Type": "application/json"
        },
        body: JSON.stringify(body)
    });

    const ubidotsResponse = await res.json();

    return {
        status: "ok",
        inputValue: inputString,
        outputValue: outputValue,
        ubidots: ubidotsResponse
    };
}