'How to cast a boolean into a number in App Inventor?

When I toggle a switch in App Inventor, a number must be sent in Bluetooth Low Energy (BLE).

The problem is the following:
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and I want to use the value inside a call to BLE:
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The boolean is correct, the value sent is correct if it is set to a number. How to cast a boolean to a number then on AppInventor ? Any ideas ?

app-inventor


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