source.md

Source (Bluetooth transmitter)

Pulls PCM from your code, encodes it and streams it to a speaker or headset.

int32_t get_audio(Frame* frames, int32_t count) { /* fill frames */ return count; }
BluetoothA2DPSource source;
void setup() { source.start("MySpeaker", get_audio); }   // name of the remote device

The speaker (in pairing mode) is found by an inquiry and matched by name.

API

Method	Purpose
start(name, cb)	scan for the device name and connect; cb provides Frames
start_raw(name, cb)	same, the callback delivers raw 16 bit stereo bytes
start_with_address(addr, cb)	connect directly to a known address
set_ssid_callback(cb)	decide for each discovered device whether to connect
set_local_name(name)	name under which this device is visible
set_volume(v), set_volume_control(bool)	volume (applied to the PCM data by default)
set_on_connection_state_changed(cb)	state callbacks
play(), pause(), stop()	start / suspend / stop the stream
add_codec(), set_sbc_codec()	additional codecs, see codecs.md