Differences

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--- tech [2026/03/24 06:23] – neds
+++ tech [2026/03/24 06:39] (current) – neds
@@ Line 565: / Line 565: @@
 </WRAP>
+</WRAP>
+===== Using /sys/boot =====
+<WRAP indent>
+The /sys/boot variable allows the TECH unit to automatically set variables at startup, allowing you to preserve settings across power outages or simply set the power on defaults.
+The syntax for the /sys/boot consists of multiple lines of text; a variable name followed by a single space and then the value: (there should not be any space before the variable name)
+<WRAP indent>
+<code>
+<variable1> <value of variable1>
+<variable2> <value of variable2>
+...
+<variableN> <value of variableN>
+</code>
+</WRAP>
+Example (save as boot.txt):
+<WRAP indent>
+<code>
+/tuner0/channelmap us-cable
+/tuner0/channel 103
+/tuner0/program 4
+</code>
+</WRAP>
+To store the configuration to the device:
+<WRAP indent>
+<code>
+Format: hdhomerun_config <id> set /sys/boot - < filename
+Example: hdhomerun_config FFFFFFFF set /sys/boot - < boot.txt
+</code>
+</WRAP>
+Changes will be applied the next boot; to execute the new /sys/boot immediately:
+<WRAP indent>
+<code>
+Format: hdhomerun_config <id> execute
+Example: hdhomerun_config FFFFFFFF execute
+</code>
+</WRAP>
+==== Static IP assignment ====
+<WRAP indent>
+A static IP address can be configured using the following command (the quotes are required as shown):
+<WRAP indent>
+<code>
+Format: hdhomerun_config <old ip> set /sys/ipaddr "<new ip> <subnet> <gateway>"
+Example: hdhomerun_config 169.254.34.98 set /sys/ipaddr "10.10.20.43 255.255.255.0 10.10.20.1"
+</code>
+</WRAP>
+Note: The TECH requires a gateway when used to stream multicast, even if on the same subnet.
+</WRAP>
+==== Reverting to DHCP ====
+<WRAP indent>
+The TECH can be configured for DHCP operation (default) using the following command:
+<WRAP indent>
+<code>
+Format: hdhomerun_config <old ip> set /sys/ipaddr dhcp
+Example: hdhomerun_config 169.254.34.98 set /sys/ipaddr dhcp
+</code>
+</WRAP>
+</WRAP>
+</WRAP>
+===== Setting the channel map =====
+<WRAP indent>
+The channel map is a non-volatile configuration option that is used to set the channel to frequency table, to configure the channel scan table, and to optimize the auto-modulation detection.
+GUI: The channel map can be set for each tuner by running HDHomeRun Config (GUI).
+Command line: The channel map can be set for each tuner using the following command:
+<WRAP indent>
+<code>
+Format: hdhomerun_config <ip|id> set /tuner<n>/channelmap <channelmap>
+Example: hdhomerun_config 10001000 set /tuner0/channelmap us-cable
+Example: hdhomerun_config 10001000 set /tuner1/channelmap us-cable
+</code>
+</WRAP>
+Channel maps supported by HDHR-TECH-US hardware:
+<WRAP indent>
+^ Name ^ Description ^ Location ^
+| us-bcast | Digital Antenna (ATSC). | US, Canada |
+| us-cable | Digital Cable - Normal frequency layout. | US, Canada |
+| us-hrc | Digital Cable - HRC frequency layout. | US, Canada |
+| us-irc | Digital Cable - IRC frequency layout. | US, Canada |
+</WRAP>
+Channel maps supported by HDHR-TECH-EU hardware:
+<WRAP indent>
+^ Name ^ Description ^ Location ^
+| au-bcast | Digital Antenna (Australia). | Australia |
+| au-cable | Digital Cable (Australia). | Australia |
+| eu-bcast | Digital Antenna (Europe). | Europe, New Zealand |
+| eu-cable | Digital Cable (Europe). | Europe, New Zealand |
+| tw-bcast | Digital Antenna (Taiwan). | Taiwan |
+| tw-cable | Digital Cable (Taiwan). | Taiwan |
 </WRAP>