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add link to device selection chart 

Add a link to the device selection chart in the section on choosing 
hardware.
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AB7PA 2022-04-17 16:59:48 -07:00 committed by WU2S
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10
arednGettingStarted/selecting_devices.rst
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Selecting Radio Hardware
========================
The amateur radio community has recognized the benefits of using inexpensive commercial :abbr:`WISP (Wireless Internet Service Provider)` radios to create AREDN |trade| networks. Each of these devices come with the vendor's firmware pre-installed, but by following a few simple steps this firmware can be replaced with an AREDN |trade| firmware image. Several open source software features have been adapted and enhanced to create the AREDN |trade| firmware, including `OpenWRT (Open Wireless Router) <https://en.wikipedia.org/wiki/OpenWRT>`_ and `OLSR (Optimized Link State Routing protocol) <https://en.wikipedia.org/wiki/Optimized_Link_State_Routing_Protocol>`_. The AREDN |trade| team builds specific firmware images tailored to each type or version of radio, and the current list of supported devices is found on the AREDN |trade| website in the `Supported Platform Matrix <https://www.arednmesh.org/content/supported-platform-matrix/>`_.
The amateur radio community has recognized the benefits of using inexpensive commercial :abbr:`WISP (Wireless Internet Service Provider)` radios to create AREDN |trade| networks. Each of these devices come with the vendor's firmware pre-installed, but by following a few simple steps this firmware can be replaced with an AREDN |trade| firmware image.
Several open source software projects have been adapted and enhanced to create the AREDN |trade| firmware, including `OpenWRT (Open Wireless Router) <https://en.wikipedia.org/wiki/OpenWRT>`_ and `OLSR (Optimized Link State Routing protocol) <https://en.wikipedia.org/wiki/Optimized_Link_State_Routing_Protocol>`_.
The AREDN |trade| team builds specific firmware images tailored to each type of radio, and the current list of supported devices is found on the AREDN |trade| website in the `Supported Platform Matrix <https://www.arednmesh.org/content/supported-platform-matrix/>`_.
There is additional guidance on the features and characteristics of specific devices in the `Device Selection Chart <https://www.arednmesh.org/content/device-selection-chart/>`_ on the AREDN |trade| website.
When selecting a device for your AREDN |trade| hardware there are several things to consider in your decision.
- Radios should be purchased for the specific frequency band on which they will operate. Currently AREDN |trade| supports devices which operate in several bands. Check the AREDN |trade| `website <https://arednmesh.org>`_ for the latest information.
- Radios should be purchased for the specific frequency band on which they will operate. Currently AREDN |trade| supports devices which operate in several bands. Check the `frequency and channel chart <https://arednmesh.readthedocs.io/en/latest/appendix/freq_charts.html>`_ on the AREDN |trade| website for the latest information.
- Many devices have an integrated dual-polarity :abbr:`MIMO (Multiple Input-Multiple Output)` antenna which helps to leverage multipath propagation. AREDN |trade| has always supported and recommended using MIMO hardware, since these devices typically outperform single chain radios when used as mesh nodes.