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CONFIGURATION.md
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## Required global variables
* GW_ID required
* GW_KEY required
This gateway ID and gateway Key for TTN will be used to fetch the gateway's information form the TTN console. When SERVER_TTN is true, this will also be used to conenct and forward packets to TTN.
* This gateway ID and gateway Key for TTN will be used to fetch the gateway's information form the TTN console. When SERVER_TTN is true, this will also be used to conenct and forward packets to TTN.
## Optional global variables
* GW_CONTACT_EMAIL optional - default an empty string
The gateway owner's contact information. Will be overridden by the value from the TTN console.
* GW_EUI - by default an EUI will be generated from the Raspberry Pi's ethernet MAC address.
* The unique identifier for this gateway. It is used in LoRaWAN networks to identify where the packet was received and to address where a downlink packet needs to be sent from.
* GW_CONTACT_EMAIL - default an empty string
* The gateway owner's contact information. Will be overridden by the value from the TTN console.
* GW_DESCRIPTION optional - default an empty string
A description of this gateway. Will be overridden by the value from the TTN console.
* A description of this gateway. Will be overridden by the value from the TTN console.
* GW_RESET_PIN - default 22
The physical pin number on the Raspberry Pi to which the concentrator's reset is connected. See the [README](README.md) file for a description and a list of common values.
* The physical pin number on the Raspberry Pi to which the concentrator's reset is connected. See the [README](README.md) file for a description and a list of common values.
* GW_GPS optional - default False
* If true, use the hardware GPS.
* If false,
use either fake gps if a location was configured in the TTN console,
otherwise try using fake gps with the reference location as set via environment variables,
otherwise don't send coordinates.
* use either fake gps if a location was configured in the TTN console,
* otherwise try using fake gps with the reference location as set via environment variables,
* otherwise don't send coordinates.
* GW_GPS_PORT optional - default /dev/ttyAMA0
The UART to which the hardware GPS is connected to.
* The UART to which the hardware GPS is connected to.
* GW_REF_LATITUDE optional - default 0
The latitude to use for fake gps if the coordinates are not set in the TTN console.
* The latitude to use for fake gps if the coordinates are not set in the TTN console.
* GW_REF_LONGITUDE optional - default 0
The longitude to use for fake gps if the coordinates are not set in the TTN console.
* The longitude to use for fake gps if the coordinates are not set in the TTN console.
* GW_REF_ALTITUDE optional - default 0
The altitude to use for fake gps if the coordinates are not set in the TTN console.
* The altitude to use for fake gps if the coordinates are not set in the TTN console.
* GW_FWD_CRC_ERR optional - default false
Forward packets with an invalid CRC.
* Forward packets with an invalid CRC.
* GW_FWD_CRC_VAL optional - default true.
Forward packets with a valid CRC.
* Forward packets with a valid CRC.
* GW_ANTENNA_GAIN optional - default 0.
Set this to the dBd gain of your antenna. The dBd value is the dBi value minus 2.15dB, ie. dBd = dBi-2.15. This is used to reduce the TX power of the concentrator to stay within the legal limits.
* Set this to the dBd gain of your antenna. The dBd value is the dBi value minus 2.15dB, ie. dBd = dBi-2.15. This is used to reduce the TX power of the concentrator to stay within the legal limits.
## Server variables
All server variables are optional, but when a server is enabled, it is recommended to set all variables to configure it completely.