Chengdu Ebyte Electronic Technology Co.,Ltd
E104-BT30-TB User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd
2-4
(green).
B:
Adapter board interface, which can be used with our core board and adapter board.
C:
This module is an audio input and output module.
S8: press the key, press to switch the input to the MIC interface, the default is the AUX interface
Mic: mic audio input.
Aux_in: aux input (reserved)
Aux_out: audio output interface (3.55mm headphones)
D:
program download interface
E:
LED indicating circuit, there are three states of LED combination state, unconnected, connected,
and discoverable state
Disconnected state: LED0 flashes twice quickly and then turns off, so reciprocate
Connected status: LED2 is always on
Discoverable status: LED0 and LED2 blink alternately
F:
power amplifier circuit
The amplifier circuit is divided into the left channel and the right channel, which can be directly
connected to the speaker. Note that our amplifier can only push 3W power.
To use this external amplifier, you need to connect the jumper cap to the F plate as shown in the
figure.
G:
Button circuit. There are five buttons as shown in the figure above. From left to right are MFB,
PLAY, V-, V +, PREV, NEXT.
MFB
: It is a start button. Press and hold the power switch. After turning on the phone, it is still in the
pressed state to enter the discoverable state. If it is not pressed after turning on, it is in the
unconnected state. At this time, the paired mobile phone can directly connect to the module.
PLAY
: For music playback, the pause button has the following states.
When the phone is connected, short press the PLAY button to play music and pause playback.
When connecting to a mobile phone, long press to disconnect the current connection and enter the
discoverable state. At this time, LED1 will blink once.
When connected to a mobile phone, when there is an incoming call, short press the PLAY button to
answer the call.
V-:
This button is for volume reduction. It can be divided into long-press and short-press. Long-press
can continuously decrease the volume. Short-press decreases it a little.
V +:
This button is for volume increase. There are long press and short press for the key. Long press
continuously increases the volume. Short press increases it a bit.
Note: The above two volume buttons cannot synchronize the volume of the mobile phone by default.
