Just a follow up with another configuration option. If you wanted to have the Bluetooth receiver module operate with just a simple toggle switch you can use the amended configuration below. As always in integration there are no perfect solutions only trade-offs. The advantages of this system is a simple intuitive toggle control, the downside is the battery management module is always on and ready to deliver power, so the battery life of the system overall will be lower if the device is left unplugged from a charger.
In the event the battery goes completely flat, you would need to plug it back in via USB to start the charging process, then a short-press on the battery management module to re-enable the output power to the Bluetooth receiver.
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