Open/EdgeTX Battery Warnings

Step 1: Identify the Telemetry Sensor

First, ensure that your telemetry is correctly set up and that you can see the receiver battery voltage on your transmitter. The sensor might be labeled as "RxBt" or something similar.

Step 2: Create a Logical Switch

1. Go to the Logical Switches Menu:
• On your transmitter, navigate to the logical switches menu.
2. Set Up a Logical Switch:
• Choose an empty logical switch (e.g., L1).
• Set the function to a<x (less than).
• For the first value (V1), select your receiver battery voltage sensor (e.g., RxBt).
• For the second value (V2), set the threshold voltage below which you want the notification. For example, if you want a notification when the voltage drops below 7.4V, set this to 7.4.

Step 3: Create a Special Function

1. Go to the Special Functions Menu:
• Navigate to the special functions menu on your transmitter.
2. Set Up a Special Function:
• Choose an empty special function slot (e.g., SF1).
• For the switch, select the logical switch you just set up (L1).
• Set the action to Play Sound, Play Track, Play Value, or any other notification type you prefer.
• Play Sound can play a predefined sound like a beep.
• Play Track can play a custom voice track if you have them loaded on your transmitter.
• Play Value will read out the voltage.
3. Adjust Additional Settings:
• You can set the special function to repeat at intervals if you want the notification to repeat until the voltage goes back above the threshold.

Example Configuration

• Logical Switch L1: a<x RxBt 7.4
• Special Function SF1: L1 -> Play Sound -> Beep 1 (or your preferred notification method)

Testing

• Test your setup to make sure the notification activates when expected. You can simulate a low voltage condition to verify that everything works correctly.