The Ebyte EWM104-BT3095 is a high-performance Bluetooth Low Energy 5.4 audio transmission module powered by the Qualcomm QCC3095 SoC, delivering long-range wireless communication up to 200 meters, versatile DAC/I2S/SPDIF audio outputs, UART interfaces, integrated Class-AB and Class-D headphone drivers, and advanced power management for industrial and commercial wireless audio systems.
| Specifications | EWM104‑BT3095 |
| Chip Model | QCC3095 |
| bluetooth Version | V5.4 |
| Module Dimensions | 13*18mm |
| Supply Voltage | 3.0~4.3V@VBAT |
| Transmitting Power | 8dBm |
| Communication Range | 200m (Connect phone in an open area) |
| Communication Interface | UART |
| Antenna Interface | Stamp hole |
| Stereo | Support |
| DSP | 240MHz Qualcomm Kalimba™ Audio DSP |
| Aptx | Support |
| AptX‑HD | Support |
| Aptx‑Adaptive | License Required |
| Aptx‑LL | License Required |
| ANC (Active Noise Cancellation ) | License Required |
| CVC (Echo Cancellation) | License Required |
Key Features
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Qualcomm QCC3095 System-on-Chip Architecture: Combines on-chip Bluetooth, advanced audio codec, and a programmable application processor for single-chip audio streaming and system management.
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Triple-Format Audio Interface Versatility: Supports analog DAC, digital I2S, and SPDIF outputs alongside built-in Class-AB and Class-D drivers to drive external speakers or DAC ICs directly.
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Long-Range 200m BLE 5.4 Connectivity: Offers reliable Bluetooth 5.4 transmission up to 200 meters in line-of-sight environments for wide-area audio distribution.
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Ultra-Compact SMD Form Factor: Measures 13 x 18 mm and weighs 1.0g +/- 0.1g, enabling seamless surface-mount integration into space-constrained hardware boards.
Selection Warning: Verify host MCU interface requirements (UART/I2C), target audio output format (Analog DAC vs. Digital I2S/SPDIF), Bluetooth protocol version, and line-of-sight range requirements prior to hardware design.
| Model | Main Chipset | Bluetooth Version | Max Distance | Audio Outputs | Control Interface | Dimensions |
|---|---|---|---|---|---|---|
| EWM104-BT3095 | Qualcomm QCC3095 | BLE 5.4 | 200 m | DAC / I2S / SPDIF | UART | 13 x 18 mm |
| EWM104-BT5125 | Qualcomm QCC5125 | BLE 5.1 | 100 m | I2S / Analog DAC | UART | 13 x 18 mm |
| EWM104-BT3008 | Qualcomm QCC3008 | BLE 5.0 | 50 m | Analog DAC / I2S | UART | 13 x 18 mm |
Industrial Installation & Wiring
The EWM104-BT3095 features a castellated SMD stamp-hole package suitable for automated SMT pick-and-place assembly. Connect VCC (regulated power source) and GND pins, interface the UART TX/RX lines directly to the host MCU for AT command configuration, and route the DAC, I2S, or SPDIF signals to downstream audio amplifiers or codec processing boards.
| Pin No. | Pin Name | Power | Pin Direction | Pin Description |
|---|---|---|---|---|
| 1 | GND | - | GND | Ground |
| 2 | PIO21 | VDD_PADS | I/O | Programmable I/O pin 21; when IO21 is high, SPDIF output is selected. Other functions: PCM_DOUT2 |
| 3 | PIO20 | VDD_PADS | I/O | Power amplifier enable pin, programmable I/O pin 20 |
| 4 | PIO19 | VDD_PADS | I/O | Programmable I/O pin 19, other functions: PCM_DIN0 |
| 5 | PCM_DOUT0 | VDD_PADS | I/O | Programmable I/O Port 18, connected to I2S_DIN or SPDIF_OUT |
| 6 | PCM_SYNC | VDD_PADS | I/O | Programmable I/O Port 17, connected to I2S_LRCK |
| 7 | PCM_CLK | VDD_PADS | I/O | Programmable I/O Port 16, connected to I2S_BCK |
| 8 | PCM_MCLK | VDD_PADS | I/O | Programmable I/O Port 15, connected to I2S_MCK |
| 9 | USB_DN | - | I/O | USB Data Negative Pin |
| 10 | USB_DP | - | I/O | USB Data Positive Pin |
| 11 | SYS_CTRL | VBAT | I | After maintaining a high level for 6 seconds, switch to a low level to power on or off; the device will automatically enter pairing mode |
| 12 | VBAT | VBAT | I | Battery Connector, Battery Voltage Input: 3.0‑4.3 V |
| 13 | CHG_EXT | VCHG | I | External Charging Control, External Charging Transistor Current Control |
| 14 | VCHG | VCHG | I | Charging Connector, Battery Charging Input: 4.0 V‑5.5 V |
| 15 | LED3 | - | I/O | Analog/Digital Input, Open‑Drain LED Output |
| 16 | LED2 | - | I/O | Analog/Digital Input, Open‑Drain LED Output, flashes when paired |
| 17 | GND | - | GND | Ground |
| 18 | LED1 | - | I/O | Analog/Digital Input, Open‑Drain LED Output |
| 19 | LED0 | - | I/O | Analog/Digital Input, Open‑Drain LED Output |
| 20 | PIO7 | VDD_PADS | I/O | Programmable I/O Port 7, UART_RX |
| 21 | PIO4 | VDD_PADS | I/O | Button PIO[4]: Short press to play/pause |
| 22 | PIO3 | VDD_PADS | I/O | Button PIO[3]: Short press to increase volume; long press to continuously increase volume; double‑click to skip to the next track |
| 23 | PIO6 | VDD_PADS | I/O | Programmable I/O Port 6: UART_TX |
| 24 | PIO5 | VDD_PADS | I/O | Button PIO[5]: Short press to reconnect; long press for 3 seconds to disconnect; 6 seconds to enter pairing mode; 8 seconds to clear the playlist |
| 25 | PIO8 | VDD_PADS | I/O | Programmable I/O Port 8; when IO8 is set high, select DAC output |
| 26 | PIO2 | VDD_PADS | I/O | Button PIO[2]: Short press to decrease volume; long press to continuously decrease volume; double‑click to skip to the previous track |
| 27 | RESET#/PIO1 | VDD_PADS | I/O | Press the PIO[1] module reset button to reset |
| 28 | GND | - | GND | Ground |
| 29 | VDD_PADS | - | PWR | PIO Power Input, 1.8 V/3.3 V PIO Power Supply |
| 30 | 1V8_SMPS | - | PWR_OUT | Power Output, 1.8 V Power Output |
| 31 | SPKR_N | - | O | Speaker Differential Output—Right Channel Negative |
| 32 | SPKR_P | - | O | Speaker Differential Output—Right Channel Positive |
| 33 | SPKL_N | - | O | Speaker Differential Output—Left Channel Negative |
| 34 | SPKL_P | - | O | Speaker Differential Output—Left Channel Positive |
| 35 | MIC_BIAS | - | O | Analog Output, Microphone Bias Output |
| 36 | MIC1_N | - | I | Analog Input, Microphone Differential Input 1 Negative |
| 37 | MIC1_P | - | I | Analog Input, Microphone Differential Input 1 (Positive) |
| 38 | MIC2_N | - | I | Analog Input, Microphone Differential Input 2 (Negative) |
| 39 | MIC2_P | - | I | Analog Input, Microphone Differential Input 2 (Positive) |
| 40 | MIC3_N | - | I | Analog Input, Microphone Differential Input 3 (Negative) |
| 41 | MIC3_P | - | I | Analog Input, Microphone Differential Input 3 (Positive) |
| 42 | MIC4_N | - | I | Analog Input, Microphone Differential Input 4 (Negative) |
| 43 | MIC4_P | - | I | Analog Input, Microphone Differential Input 4 (Positive) |
| 44 | GND | - | GND | Ground |
| 45 | GND | - | GND | Ground |
| 46 | RF_PORT | - | O | External Antenna |
| 47 | GND | - | GND | Ground |
| 48 | PIO39 | VDD_PADS | I/O | Programmable I/O Pin 39, Other Functions: QSPI2_IO3 |
| 49 | PIO38 | VDD_PADS | I/O | Programmable I/O Pin 38, Other Functions: QSPI2_CS# |
| 50 | PIO37 | VDD_PADS | I/O | Programmable I/O Pin 37, Other Functions: QSPI2_IO1 |
| 51 | PIO36 | VDD_PADS | I/O | Programmable I/O pin 36; when IO36 is high, it serves as a USB input; when low, it serves as an AUX input; other functions: QSPI2_IO2 |
| 52 | PIO35 | VDD_PADS | I/O | Programmable I/O pin 35; other functions: QSPI2_CLK |
| 53 | PIO34 | VDD_PADS | I/O | Programmable I/O Pin 34, Other Functions: QSPI2_IO0 |
| 54 | PIO22 | VDD_PADS | I/O | Programmable I/O Pin 22, Other Functions: PCM_DIN1 |
| No. | Definition | Function Description |
|---|---|---|
| 1 | USB_IN | 5V power supply from the backplane; connects to the USB port on the EWM104‑BT3095 |
| 2 | Battery Connector | Battery input port; connects to the VBAT pin on the EWM104‑BT3095 |
| 3 | Power Switch | Backplane power switch: slide to ON to turn on the power, slide to OFF to turn off the power |
| 4 | Chassis Power Supply Selection Switch | Switch the power supply method for the resources on the base board: slide the switch to "5V" to power the base board resources via USB, or slide it to "BAT" to power them via battery |
| 5 | KEY_SYS_CTRL | Default: Module power on/off control; user‑programmable |
| 6 | KEY_RESET | Module reset control button: Press to reset |
| 7 | KEY_PIO2 | By default: Short press to decrease volume; long press to continuously decrease volume; double‑tap to skip to the previous track |
| 8 | KEY_PIO3 | By default: Short press to increase volume; long press to continuously increase volume; double‑tap to skip to the next track |
| 9 | KEY_PIO4 | By default: Short press to play/pause |
| 10 | KEY_PIO5 | By default: Short press to reconnect; long press for 3 seconds to disconnect; long press for 6 seconds to enter pairing mode; long press for 8 seconds to clear the playlist |
| 11 | I/O Voltage Switch | Used to switch the supply voltage for the module's VDD_PADS and on‑board digital I/O; set to 3.3V to supply 3.3V, and set to 1.8V to supply 1.8V |
| 12 | Module Power Supply Jumper | Used to measure the module's operating current |
| 13 | 1.27mm Pitch Female Connector Strip | EWT104‑QC02Z Installation Location |
| 14 | MIC_L | Left‑channel microphone |
| 15 | AUX_IN | AUX audio input port, compatible with 3.5mm three‑pin plugs, featuring insertion detection and path switching. When a 3.5mm three‑pin plug is inserted, the microphone power is disconnected, and the module's audio input channel switches to AUX_IN. When the 3.5mm three‑pin plug is removed, the microphone power is restored, and the module's audio input channel switches back to the microphone |
| 16 | MIC_R | Right‑channel microphone |
| 17 | Stereo Headphone Amplifier | Stereo headphone amplifier; input connects to the module's AUX output, and output connects to the AUX_OUT port |
| 18 | AUX_OUT | AUX_OUT port, compatible with 3.5mm three‑pin and four‑pin plugs, with path switching: when no 3.5mm plug is inserted, the audio signal is output to the 3W stereo amplifier; when a three‑pin 3.5mm plug is inserted, the audio signal is output to the AUX_OUT port |
| 19 | 3W Stereo Power Amplifier | A stereo amplifier with 3W output power; the input is connected to a stereo headphone amplifier and a stereo audio DAC, and the output is connected to the left and right speaker terminals |
| 20 | OUT_L | Left Channel Speaker Connector |
| 21 | OUT_R | Right Channel Speaker Connector |
| 22 | Stereo Audio DAC | Stereo audio DAC with I2S interface; the input connects to the module's I2S interface, and the output connects to the I2S_OUT |
| 23 | I2S_OUT | AUX_OUT connector, compatible with 3.5mm three‑pin and four‑pin plugs, with path switching; when no 3.5mm plug is inserted, the audio signal is output to the 3W stereo amplifier; when a three‑pin 3.5mm plug is inserted, the audio signal is output to the I2S_OUT connector |
| 24 | SPDIF_IN | Optical audio input connector |
| 25 | SPDIF_OUT | Optical Audio Output Port |
Real-World Application Scenarios
1. Industrial Public Broadcasting and Wireless PA Terminals
In large manufacturing factories and industrial parks, deploying wired audio cabling across extensive production workshops and assembly lines leads to high construction and maintenance costs. Built for industrial wireless audio transmission, the EWM104-BT3095 Bluetooth audio module features a 200-meter long-distance transmission capability based on the BLE 5.4 protocol. Embedded into local wireless broadcast receivers, the module stably receives high-fidelity audio streams from central control hosts and outputs standard I2S or SPDIF digital audio signals to drive high-power industrial amplifiers, realizing reliable long-range industrial public audio broadcasting.
2. Smart Factory Voice Prompt and Audio-Visual Alarm System
Modern industrial automation requires real-time voice reminders and safety early warnings for hazardous working areas. When integrated with Ebyte industrial DTU controllers and deployed on factory alarm nodes, the EWM104-BT3095 supports UART command interaction with industrial hosts. With the built-in Class-D audio driver, the module triggers instant dynamic voice broadcasting, achieving low-latency audio alarm prompts and improving overall factory safety response efficiency.
3. Commercial Wireless Headphones and Audio Guide Receiving Terminals
Commercial wireless headsets and tour guide audio terminals demand lightweight design, low power consumption and clear audio performance. Featuring a compact 13×18mm ultra-small form factor and integrated Class-AB headphone driver, the EWM104-BT3095 eliminates the need for external decoding codec chips. Audio device manufacturers can adopt this module to develop lightweight, low-power wireless communication headsets, portable audio receivers and professional wireless tour guide terminals for commercial scenarios.
4. Outdoor Security and Emergency Communication Base Stations
Municipal security monitoring and outdoor emergency safety systems require wide-range audio coverage and stable voice broadcast capabilities. Cooperating with Ebyte outdoor industrial communication gateways, the EWM104-BT3095 acts as a high-stability long-range Bluetooth audio bridge. It receives remote voice signals within an open-area 200-meter coverage radius and outputs analog DAC audio to external high-power horn speakers, achieving clear and stable outdoor emergency voice warnings and security broadcasting.
Technical FAQs About EWM104-BT3095 Module
Q: What audio output formats does the EWM104-BT3095 module support?
A: The EWM104-BT3095 supports complete analog and digital dual audio interfaces. It supports analog DAC audio output, as well as mainstream digital audio formats including I2S and SPDIF. Equipped with built-in Class-AB and Class-D audio drivers, the module can directly drive headphones or connect to external industrial power amplifiers without additional peripheral circuits.
Q: What is the maximum effective communication distance of the module?
A: Adopting the latest Bluetooth 5.4 protocol specification, the EWM104-BT3095 achieves a maximum wireless transmission distance of 200 meters in open and unobstructed environments, delivering longer coverage and stronger anti-interference performance compared with traditional Bluetooth audio modules.
Q: How to configure and integrate the module into the main control system?
A: The module adopts standard UART serial port communication to interact with mainstream MCU main control units. Developers can complete parameter configuration, function switching and status query via universal AT commands. Meanwhile, programmable PIO pins support customized logic development and flexible power management adaptation, facilitating rapid secondary development and system integration for IoT embedded projects.
Q: What are the core differences between EWM104-BT3095 and EWM104-BT5125?
A: The EWM104-BT3095 is built on the Qualcomm QCC3095 chip platform, supporting Bluetooth 5.4 protocol, 200-meter long-distance transmission and professional SPDIF digital audio output, which is more suitable for industrial long-range audio transmission scenarios. In contrast, the EWM104-BT5125 adopts the Qualcomm QCC5125 solution with Bluetooth 5.1 protocol and a standard transmission distance of 100 meters, more applicable for short-distance consumer audio devices.
