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Merge pull request #436 from smika6/radxa-gs-wiki-info-update 

Update fpv-radxa.md for GPIO Buttons & HDZero GS
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Signor Pellegrino 2025-01-15 02:01:19 +03:00 committed by GitHub
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@ -25,6 +25,7 @@ This documentation provides a list of enclosures for OpenIPC VRX setups, availab
7. [OpenIPC Radxa Zero 3W HDMI Ground Station](https://www.printables.com/model/1020246-openipc-radxa-zero-3w-hdmi-ground-station)
8. [Radxa Zero 3W Case for OpenIPC](https://www.printables.com/model/1054879-radxa-zero-3w-case-for-openipc)
9. [OpenIPC VRX Case on Thingiverse](https://www.thingiverse.com/thing:6680584)
10. [OpenIPC Radxa Zero 3W HDZero Rail Mount](https://www.printables.com/model/811132-openipc-radxa-zero-3w-hdzero-goggle-case-rail-moun/files)
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@ -49,12 +50,13 @@ Note: for RubyFPV you will either need a USB Network Dongle like the one below
or access serial console, please check [here](https://wiki.radxa.com/Zero/dev/serial-console) on how to do that.
### DVR with FPV firmware
### GPIO Buttons
DVR functionality; It requires a push button to be installed to the gpio header between physical pins 25 and 27 like so:
Connect a button or switch to 3.3v and physical pins 16 and 18 to increase/decrease your vrx channel.
Connect a button or switch to physical pin 38 and 3.3v to toggle your vrx bandwidth between 20MHz and 40Mhz.
Physical pin 32 controls DVR recording, connect a button/switch to join 3.3v and pin 32 to start/stop recordings.
![image](../images/fpv-radxa-gpio.png)
(![GPIO Mappings](https://github.com/user-attachments/assets/6b524a5a-37d8-4bc0-8bdd-e3b15b33ddf5)
To record DVR, push the button once. The stream will start and DVR will begin recording. When finished, push the button once to stop the recording and save the file.