Module model: BTM525
Bluetooth chip: QCC5125, 32m SPI flash built in the module
Bluetooth version: 5.1
Module size: 13mm x 18mm x 2.5mm
Power supply voltage: 3.0-4.3v
Default firmware:
1. Support SBC, AAC, aptx, aptx ll, aptx HD, aptx adaptive decoding, no call function, optional I2S, SPDIF, analog output
2. Key Description:
SYS_ CTRL: power on at high level, power off at low level, and enter pairing mode automatically when starting
PIO2: short press play pause, long press for 3 seconds to enter pairing, and long press for 5 seconds to clear pairing record
Press pio3 to decrease the volume
PIO4: short press a song, long press volume up
PIO5: connected to high level, not connected to low level
PIO19: audio output high level, no audio low level
PIO20: SPDIF output port
Description of indicator light:
Bluetooth not connected: LED0 LED1 alternate flash
Bluetooth connected: LED1 is always on
Bluetooth audio playback: LED1 is always on
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