List devices using Advanced Google Services

listDeviceStates.gs

function listDeviceStatesForRegistry() {
  var cloudRegion = 'us-central1';
  var name = 'your-registry-name';
  var projectId = 'your-project-id';
  var parent = 'projects/' + projectId + '/locations/' + cloudRegion;
  var registryName = parent + '/registries/' + name;

  var response = CloudIoT.Projects.Locations.Registries.Devices.list(registryName);

  if (response.devices) {
    response.devices.forEach(
      function(device){
        var deviceName = registryName + '/devices/' + device.id;
        var states = CloudIoT.Projects.Locations.Registries.Devices.States.list(deviceName);
        var data = '';
        if (states && states.deviceStates) {
          states.deviceStates.forEach(function(state) {          
            state.binaryData.forEach(function(value) {
              data += String.fromCharCode(value);
            });
            data += '||';
          });
        }
        console.log(data);
      });
  }
}