Creating a security certificate

Before we use AWS IoT, we should create a security certificate. Then, this certificate will be attached to our registered IoT device. Follow these steps:

1. On AWS IoT Management Console, open your IoT device. Click on the Security option on the left-hand menu. You should see a form, as shown in the following screenshot:

1. You should see a Create certificate button. Click on this button. Then, AWS IoT will generate private and public keys for your IoT device. Please download all certificate and key files:

These certificate and key files will be used in our program to access the  AWS IoT server. You should get four files, as follows:

• • Certificate file (*.pem)
  • Certificate public key file (*.key)
  • Certificate private key file (*.key)
  • Root certificate (*.pem) or (*.crt)

1. Put all these files into a folder. Our program will access these files:

The next step is to write a program. We will do so in the next section.