Fixed some GPO listener bugs

.gitignore

@@ -132,6 +132,10 @@ config_relays.json
 *.hex
 *.hex.bin
 
+# don't include Python listener clients dev files
+venv
+env
+
 # don't include .DS_Store file and vscode workspace file
 .DS_Store
 TallyArbiter.code-workspace

listener_clients/gpo-listener/README.md

@@ -26,6 +26,7 @@ These will have to be installed on the Pi in order for the script to function co
     * `sudo pip3 install "python-socketio[client]<5"`: This library is used to communicate with a Tally Arbiter server over websockets.
     * `sudo pip3 install RPi.GPIO`: This is the GPIO library used to communicate with the General Purpose In/Out pins on your Raspberry Pi.
     * `sudo pip3 install zeroconf`: This library is used for discovering TallyArbiter in your network without providing the host
+	* `sudo pip3 install argparse`: This library is used for parsing CLI args passed to this program
 
     *If `pip3` is not installed, you can get it by running `sudo apt-get install python3-pip`.*
 
@@ -53,16 +54,22 @@ Upon startup, the program will enumerate through the `config_gpo.json` file and
 TODO: update docs
 Tally Arbiter GPO Listener uses the built-in GPIO pins of a Raspberry Pi. In order for the program to use the correct pins for your wiring, it must be configured prior to execution. A configuration file, `config_gpo.json` is required to be in the same folder as the listener script.
 
-The `config_gpo.json` file contains two sections:
+The `config_gpo.json` file contains two sections and two others independent config keys:
+
+* `clientUUID`: This is used to keep the same id in TallyArbiter listener client
+
+* `output_invert`: If this is set to `true`, the GPO output are inverted. You need to use this only if you are using a common-anode led setup.
 
 * `server_config`: The IP and Port of the Tally Arbiter server.
 ```javascript
  "server_config":
  {
 	"ip": "192.168.11.141",
 	"port": 4455
+	"use_mdns": true
  }
 ```
+If `use_mdns` is set to `true`, then the listener will use MDNS instead of configured ip and port. Doing this you don't need to update the config file every time your server changes the IP Address.
 
 * `gpo_groups`: The groupings of GPO pins that you want to control. Each GPO Group can be associated with one Tally Arbiter Device.