====== First steps ======

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<span class="dev-unipi11">Unipi&nbsp;1.1</span>
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The Unipi 1.1 device does not contain internal storage, so it is necessary to purchase a [[https://www.unipi.technology/memory-cards-c33|memory card]] for each device. For more detailed information and recommendations on which card to choose, see [[en:hw:03-unipi11:suitable-sd-card|the SD card article]]. 

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[[en:hw:03-unipi11:download-image|Available OS images for Unipi 1.1 devices]] are based on the Linux Debian system and may also contain pre-installed software (SW), such as Mervis.

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**Note:** \\
This article assumes the choice of Base OS. 

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To use Mervis system the [[en:sw:01-mervis:running-on-unipi11-hidden|Mervis OS must be flashed onto the SD card]]. After connecting the power supply continue with [[en:sw:01-mervis:creating-new-project-hidden|]].

Each Unipi 1.1 complete set is [[en:sw:01-mervis:getting-mervis-licence-hidden|shipped with a request for a Mervis RT license]].
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[[.:safety-instructions#symbols_and_notes|{{:en:hw:05_safety-instructions_iso-7010-m002.png?nolink |(🕮)}}]]
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**Attention**: \\
Always follow the [[.:safety-instructions|]] when handling the device. 
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===== Flashing OS =====

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===== Connection =====
Before the first startup, it is necessary to insert an SD card with a flashed OS into the unit. \\
**Instructions for flashing the OS can be found [[en:hw:03-unipi11:image|on this link]].**


==== Connecting peripherals, sensors, control elements and communication cables ====
Before connecting the power supply it is necessary to connect all other terminals and interfaces.

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For now, only connecting an ethernet cable to the ethernet interface is needed. \\
Unipi 1.1 / Lite can be connected as follows: 
  - To the network with DHCP server {{ en:hw:connecting_to_unipi11-lan.png?direct&600 |Connecting to a network with DHCP server}}
  - Directly to the PC/Notebook {{ en:hw:connecting_to_unipi11-direct.png?direct&600 |Connecting directly to PC/Laptop}}


==== Connecting the power supply ====
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**Warning**: \\
Take extra care when plugging in, there is a risk of electric shock! Always ensure and check that the environment and device are disconnected from all voltage sources before starting work.
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**Attention:** \\
Make sure to connect the power supply last. Connection and disconnection of other interfaces should be done with power supply disconnected; otherwise, the device can be damaged.
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To ensure correct operation of the device, it is necessary to first connect the 5 V power supply. 
For information on recommended supply voltage tolerance and power consumption, refer to [[en:hw:03-unipi11:downloads|the manual]].

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**Tip:** \\
Unipi 1.1 / Lite unit must be powered by [[https://www.unipi.technology/power-supply-for-din-rail-5v-dc-2-4a-p65?categoryId=19|5 V⎓ power supply]].
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**Warning**: \\
The device has appliance class III. To protect against electric shock the circuit should not leave SELV.
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===== Accessing the device =====
The device will startup fully a few seconds after the power supply is plugged in, it may take even longer for the first startup.


==== Device address ====
Unipi 1.1 / Lite can be addressed with [[en:hw:03-unipi11:01-first-steps:mdns-hidden|mDNS record]]. mDNS address format is as follows:
  * **[model]-sn[serial number].local**
Example:
<code>UNIPI1-sn126.local</code>
**Model** and **serial number** can be found on the product label.

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**Note:** \\
Alternatively the Unipi 1.1 / Lite can be addressed via its IP address.
The IP address can usually be found on the DHCP server or by using a network scanner (such as [[en:files:software:tools:advanced-ip-scan-hidden|Advanced IP Scanner]]).

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When the Unipi 1.1 / Lite is connected to a network without DHCP server (for example directly to a PC or laptop), the Unipi 1.1 / Lite assigns itself a random IP address from the range 169.254.XXX.XXX.

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==== Connecting via SSH ====
The unit is now ready to house the implementation of any project done in Base OS.
To install additional SW and to create control logic, it is necessary to [[en:automation:unipi-ssh-connect-hidden|connect via SSH]] using the address from previous step.

Username for the SSH connection is **unipi**. The user password is the one that was inserted on the SD before. For further information see [[en:sw:04-unipi-firmware:02-passwords]].

/* Co dále */
===== Further info =====
  * [[.:image#flashing_the_os_using_the_service_interface|Flashing an OS image]]
  * [[.:image#creating_a_os_back-up_on_a_usb_flashdisk|Backup OS]] or [[.:image#restore_the_os_from_back-up_on_the_usb_flashdisk|restore the OS from backup]]
  * [[en:sw:01-mervis:running-on-unipi11-hidden|Flashing Mervis on Unipi 1.1 / Lite]] and [[en:sw:01-mervis:creating-new-project-hidden|create the first program in Mervis on Unipi]]
  * [[en:sw:03-3rd-party:nodered:installation-unipi|Installing Node-RED on Unipi 1.1 / Lite]]
  * [[en:sw:04-unipi-firmware#apt_repository|Unipi tools in our OS images]]