Bluetooth on T-Echo

[moshe-braner]

Can it be turned off? To save battery power. How?

[lewisxhe]

Are you asking about a specific firmware, or an API?

[moshe-braner]

I'm working on a fork of the SoftRF firmware, which uses Adafruit's library to access BT. The T-Echo version always starts up BT. If, when BT is not needed, I were to skip the begin() (which one?), would it save power? Enough to matter? (WiFi on the T-Beam uses a lot of power, but BLE on the nRF52?) Thanks.

[lewisxhe]

I don't know about SoftRF, you need to track the source code to locate it yourself. As long as you don't call to turn on BLE, nRF52840 is turned off by default.