just found that

    public  void showToast(String message, String iconData, String iconExtension, ResponseListener<Object> listener)
    {
        JSONObject payload = new JSONObject();

        try {
            payload.put("message", message);

            if (iconData != null)
            {
                payload.put("iconData", iconData);
                payload.put("iconExtension", iconExtension);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        sendToast(payload, listener);
    }

So it is possible by adding iconData and iconExtension attributes to the payload. ~~Question is how we get the image. We could send it e.g. base64 encoded via an MQTT message - or we could define an image folder in lgtv2mqtt options where files reside that can be used.~~ Will put that on my todo, nice feature, wasn't aware that this is possible :)

Edit: just read your link and saw that we can simply supply an URL where the image can be loaded. Do you have a Webserver where you can put the images or do we need to integrate a simple webserver in lgtv2mqtt?

Use icons in Toast #7

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