Step 3: Deploy

What you’ll do: start the CARP engine on the phone and deploy the protocol to it. A deployment is one participant’s copy of the protocol, running on their phone.

There are three ways to deploy. This guide uses the first:

	Protocol comes from	Good for
On the phone (this guide)	Your app code	Trying things out, single-phone studies
Via CAWS	The CARP Portal; the app downloads it after sign-in	Real studies with many participants
CARP Studies App	The Portal; no app code at all	Studies that don’t need a custom app

Steps

1. Start the engine. SmartPhoneClientManager runs studies on the phone.

   final client = SmartPhoneClientManager();
   await client.configure();

2. Add the study and deploy it.

   final study = await client.addStudyFromProtocol(createProtocol());
   await client.tryDeployment(study.studyDeploymentId, study.deviceRoleName);

You’ll put this into the app, together with the next step, in Step 4.

Other ways to deploy

Deploy via CAWSParticipants sign in; the app downloads their study from the server.

Use the Studies AppA ready-made app. Set up the study in the Portal, no code.

Deployment in depthThe client manager, deployment states and app tasks.

Next: Step 4: Collect