Description
This product, MH-M28, is a low-power Bluetooth design solution, supporting the latest Bluetooth 4.2 transmission, two-channel stereo lossless playback, and Bluetooth connection after the module is connected to Bluetooth, which is very convenient. In an open environment, the Bluetooth connection distance can be up to 20 meters.
Widely used in a variety of Bluetooth audio receptions, a variety of audio DIY modifications.
Pinout
| Pin number | Pin header | Description |
| 1 | 5V | Power positive 5V |
| 2 | GND | Negative power supply |
| 3 | VBAT | Lithium battery positive 3.7-4.2V |
| 4 | L | Left channel output |
| 5 | R | Right channel output |
| 6 | AGND | Audio ground |
Function Description
Bluetooth V4.2 version, supports Bluetooth automatic connection technology, supports WAV/WMA/FLAC/APE/MP3 lossless decoding, and supports stereo dual channel output.
After the module is powered on, the mobile phone searches for the Bluetooth name MH-M18/MH-M28/MH-M38, and can play music after connecting Bluetooth.
 Â
1. Power supply: You can directly use the Micro USB Android cable (5V) for direct power supply, or you can also connect a 5V power supply or a 3.7V lithium battery (as shown below). Note that the 5V and 3.7V power supply interfaces are different. The 5V voltage is connected to 5V and GND, and the 3.7V lithium battery is connected to VBAT and GND.
2. Audio output: The earphone can be directly connected to the 3.5mm audio interface, or it can be wired for the audio input of the power amplifier board
Package Includes
- 1 x MH-M28 Wireless Bluetooth MP3 Audio Receiver board BLT 4.2 mp3 lossless decoder