GoogleCast

This component allows you to communicate with Chrome Cast dongles or smart TVs that support the Google Cast Protocol.

Using

Add these lines to your application componenent.mk file:

COMPONENT_DEPENDS += GoogleCast
ENABLE_SSL := Bearssl

Add these lines to your application:
```
#include <Network/GoogleCast/Client.h>
```

Basic example:

#include <Network/GoogleCast/Client.h>

GoogleCast::Client castClient;

void gotIp(IpAddress ip, IpAddress mask, IpAddress gateway)
{
   // connect directly to the IP of the devise
   castClient.connect(IpAddress("192.168.10.15"));

   castClient.onConnect([](bool success) {
      Serial.print(F("Client connect: "));
      Serial.println(success ? "OK" : "FAIL");
      if(success) {
        // Starting YouTube on the device
        castClient.receiver.launch(APPID_YOUTUBE);
      }
   });
}

Re-Generating C files from proto file

You can re-generate the C files from the proto file. This can be useful if you want to use a newer version of the Google Cast proto file. Make sure to compile it using nanopb. The re-generation can be done with the commands below:

cd $SMING_HOME/Libraries/GoogleCast/samples/basic
make python-requirements # should be executed once to download and install the required python packages
make rebuild-cast-proto

Protocol

There are multiple documents in internet that describe the Google Cast protocol and its inner workings. As a start one can take a look at the presentation and documents below.

App-Ids

List of current APP-IDS https://clients3.google.com/cast/chromecast/device/baseconfig

Individual app configurations are obtained from this url: https://clients3.google.com/cast/chromecast/device/app?a={appid}

Where {appid} is the id of the app, and the output of this is JSON in the format of a receiver app definition.

References

Used by

Google Cast Client Sample

SoC support

esp32
esp32c2
esp32c3
esp32s2
esp32s3
esp8266
host
rp2040