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5PCS BTM331 QCC3031 Bluetooth Module Audio Module (Default Firmware I2S Output) for APTX-HD APTX
Specifications:
- Model number: SJR-BTM331
- Bluetooth chip: QCC3031 and module built-in 32M SPI FLASH
- Bluetooth version: 5.1
- Module size: 13mm x 18mm x 2.5mm
- Power supply voltage: 3.0-4.3V
Default Firmware:
- For SBC, AAC, aptx and aptx-HD decoding. No call function. Optional I2S, SPDIF and analog output
Button Description:
● SYS_CTRL: It will be powered on when there is high level. And it will be powered off when there is low level. It will automatically enter pairing mode when it is powered on.
● PIO2: Short press to play/pause. Long press for 3 seconds to enter paring mode. Long press for 5 seconds to clear the pairing record.
● PIO3: Short press for the previous song. Long press to turn it down.
● PIO4: Short press for the next song. Long press to turn it up.
● PIO5: There is high level when it is connected and there is low level when it is not connected.
● PIO19: With audio, it outputs high level. There is low level without audio.
Indicator Description:
- Bluetooth is not connected: LED0 and LED1 flash alternately
- Bluetooth is connected: LED1 stays on
- Bluetooth audio playing mode: LED1 stays on
Attention:
- To use a USB sound card, you must connect the four wires of the module: USBDP, USBDN, VCHG and GND.
Package Included:
- 5 x Bluetooth Modules
