Setting up Trezor One for use with Casa

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This article details how to set up (initialize) your Trezor One hardware device for use with Casa App.

Not a Casa member yet? You can try Casa App for free for 30 days!

To begin, verify the integrity of the device box to ensure that it is free from tampering.

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Once your Trezor One has been unboxed, head over to suite.trezor.io in your browser. You will have the choice to either download Trezor's Desktop App, or use the web suite.

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We recommend downloading the desktop app. The following instructions are written for the desktop app.

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After downloading the desktop app, install it to your computer, open it up, and connect your Trezor One, using the provided cord.

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If your device is not recognized once plugged in, head over to wallet.trezor.io/#/bridge to download the bridge and resolve this issue.

Next, you'll see a security check, which verifies the authenticity of your Trezor device. Click "Setup Trezor" at this step.

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If this is your first time setting up this device, you'll be asked to do a firmware update.

Casa always recommends getting the latest firmware when initializing a device for the first time, before the key is used to secure funds. You can view the latest firmware versions for Trezor here.
Follow the steps to update your firmware if needed.
 
Next, choose "Create New Wallet," and confirm the action on your device.
 
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Now you’ll need to complete the backup process. Choose "Wallet Backup," confirm the action on your Trezor device, then press "Create Backup." You'll then select "Standard seed backup" in the next window.
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During this backup process, you’ll be prompted to write down the 12-word seed phrase.

Casa multisig allows for a fully "seedless" setup, so if you'll be using this Trezor One exclusively with Casa, writing down the 12-word recovery seed is considered optional.

You can write down the seed phrase if you choose to. If you ever lose or break the device, the seed phrase will be able to restore the Casa signing key on a new device. 

See: Seedless multisig for more info on this topic and decide what's right for you.

At this step, you can either "Begin Backup," or "Skip Backup" if you choose not to write down the seed phrase.

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If you choose to write down your backup, you'll be shown the 12 words on your Trezor device, and write them down.
 
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Next, you’ll set the PIN code on your Trezor. It’s very important that you do not forget this, a lost PIN is a lost key! If you are using multiple hardware devices, we recommend using the same 4-8 character PIN (no zeros) across all your hardware devices, and saving it in a password manager.

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To set the PIN, use the mixed number panel (map) on the Trezor One device as a guide to correspond with the blank, dotted squares that appear in the browser to select your PIN. You will enter the PIN twice to confirm.

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Activate the bitcoin app for your Casa setup.

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That’s it! Your Trezor One device is now initialized and ready to be added to your keyset.

You will see the option to name your Trezor if you wish, and change other settings about the device, but this is optional. 

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While you won't be using the desktop app going forward (you primarily interact with your funds via Casa App), you may need to open the desktop app prior to adding the device to Casa, or while signing transactions. 

Finally, keep your Trezor somewhere safe and secret. Though there may not be funds in the wallet yet, keeping it secure and protected from tampering prior to funds placement is very important.

Your Trezor One can now be added to your Casa setup. See Adding Trezor to Your Casa Keyset  for more information about setting up your Key Shield or Basic Multisig wallet with your Trezor in Casa App.

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