Step 1: Login to Ruuvi Web Station account
Login to your Ruuvi Station web interface at ruuvi.com/station. You will receive a four digit password to your email address which you need to type on to Sign In login field. This is not same as the Ruuvi Cloud activation code.
Step 2: Type activation code to Ruuvi Station web interface
Once you have completed your order, the Ruuvi Cloud activation code(s) will be automatically sent to your email.
Then tap the user profile icon in the upper right corner and select My Ruuvi Account from the drop-down menu. This page shows activation instructions and a field where you can enter the code from your email.