The Ebyte E104-BT05 is a Bluetooth V2.1 BR/EDR serial module powered by the TLSR8266 chip, operating on the 2.4GHz ISM band with GFSK modulation. Delivering 3dBm max TX power and a 70m range, this compact 10x14.5mm SMD module features a built-in PCB antenna and UART interface, providing a stable, low-power transparent transmission solution for industrial IoT applications.
| Parameter | EBYTE E104-BT05 |
|---|---|
| IC / Chip Solution | TLSR8266 |
| Bluetooth Protocol | Bluetooth Specification V2.1 BR / EDR |
| Operating Frequency | 2402 ~ 2480 MHz (2.4GHz ISM Band) |
| Modulation Method | GFSK |
| Max Transmission Power | 3 dBm |
| Communication Distance | 70m (Clear and open environment) |
| Communication Interface | UART (Serial Transparent Transmission) |
| Operating Voltage | 2.5V - 3.6V (3.3V recommended) |
| Antenna Type | On-board PCB Antenna |
| Package Type | SMD (Stamp Hole) |
| Dimensions | 10 * 14.5 mm |
| Main Para.Name | Min. | Max. | Remark. |
|---|---|---|---|
| Input Voltage(V) | 0 | 3.6 | Permanent damage occurred when voltage is over 3.6V |
| Blocking Power(dBm) | - | 10 | Low chance to be damaged for short-distance transceiving |
| Working Temp.(℃) | 0°C | +85 | - |
| Main Para.Name | Min. | Typ. | Max. | Unit | Spec. |
|---|---|---|---|---|---|
| Working Voltage(V) | 3.0 | 3.3 | 3.6 | Voltage above 3.3V can guaranty Max TX power | |
| Tx Electrical Level(V) | - | 3.3 | - | 5V TTL could cause permanent damage | |
| Working Temp(℃) | 0℃ | - | +70℃ | - | |
| Working FrequencyChannel(MHz) | 2402 | - | 2480 | Support ISM Chanel | |
| TX Current(mA) | 18.5 | - | 72.6 | - | |
| RX Current(mA) | 18.7 | - | 69.1 | - | |
| Max TX Power(dBm) | - | 3 | - | - | |
| RX Sensitivity(dBm) | - | -89 | - | - | |
| Arbitrary IO(VIL/VIH) | -/1.75V | - | 1.5V/- | - | |
| Arbitrary IO(VOL/VOH) | -/VCC-0.25 | - | GNG+0.25/- | - | |
| Connection Current(slave module) | - | 20 | - | mA |
| Parameters | Value | Remarks |
|---|---|---|
| Reference Range | 1500m@SUB-1GHz | Conditions: Clear Sky, Antenna Gain 5dBi, Antenna Height 2.5m, Air rate 1kbps |
| Reference Range | 120m@2.4G | Conditions: Clear Sky, Antenna Gain 5dBi, Antenna Height 2.5m, Air rate 1Mbps |
| TCXO Frequency | 48MHz/32.768k | High rate at 48MHz/Low Rate at 32.768k |
| Protocol | GFSK | / |
| Encapsulation | SMD | / |
| Interface Type | 1.27mm Stamp Hole | / |
| IC Model | CC1352P1F3RGZ | / |
| FLASH | 352KB | / |
| RAM | 80KB | / |
| Core | Arm ® Cortex ® -M4F | / |
| Size | 32*20mm | / |
| Antenna Interfaces | IPEX/Stamp Hole@sub-1G, | |
| PCB Antenna@2.4G | Equivalent Impedance is around 50Ω | |
| Reference distance | 50m | Clear and open environment, antenna height 2.5m |
| Launch length | 300Byte | - |
| Bluetooth protocol | Bluetooth Specification V2.1+EDR | - |
| Communication Interface | UART | - |
| Packaging type | SMD | - |
| Interface method | 1.27mm | - |
| Dimensions | 13*25mm | - |
| product weight | 1.2±0.1g | - |
| Antenna interface | PCB Antenna | Equivalent impedance about 50Ω |
Practical Application Scenarios
1. Legacy Industrial Equipment Wireless Upgrades
Many traditional factory machines still rely on wired RS232 or standard UART for diagnostics. By integrating the E104-BT05 module into a custom adapter board, field engineers can convert wired UART data into wireless Bluetooth V2.1 signals. This allows operators to perform localized machine diagnostics up to 70m away using standard industrial tablets, eliminating cable wear and tear on the factory floor.
2. Smart Home Local Automation Gateways
In smart home ecosystems, local data bridging is critical for low-latency control. The E104-BT05 serves as a reliable local node, collecting data from Bluetooth BR/EDR enabled sensors (like older generation smart locks or audio controllers). When paired with an Ebyte Wi-Fi or LoRa gateway, the E104-BT05 handles the short-range 2.4GHz transparent transmission via UART, while the main gateway pushes the aggregated data to the cloud for remote monitoring.
3. Portable Medical and Diagnostic Devices
For wearable or portable diagnostic tools that require stable, continuous data streams over short distances, the Classic Bluetooth V2.1 BR/EDR protocol offers a highly mature and robust connection. OEM developers can embed this compact 10x14.5mm SMD module into patient monitoring hardware. It utilizes the TLSR8266 chip to seamlessly transmit physiological data via UART to a nearby receiver without the packet overhead typical in complex networking protocols.
FAQ Section
1. What is the logic level requirement for the UART interface?
The E104-BT05 operates at a standard voltage of 2.5V to 3.6V (3.3V is highly recommended for maximum TX power). The TX and RX logic levels correspond to this voltage. You must not connect it directly to a 5V TTL system, as voltage exceeding 3.6V will cause permanent damage to the TLSR8266 chip. Please use a logic level converter when interfacing with 5V MCUs.
2. Can I use an external antenna with this module to increase the 70m range?
No, the E104-BT05 is specifically designed with a highly optimized on-board PCB antenna to maintain its ultra-compact 10x14.5mm footprint and reduce BOM costs for OEMs. The 70m range is achieved in clear, open environments at a maximum transmission power of 3dBm. If your project strictly requires an external antenna, we recommend exploring Ebyte's IPEX-enabled RF modules.
3. Does the E104-BT05 support Bluetooth Low Energy (BLE) communication?
This specific model is strictly based on the Bluetooth Specification V2.1 BR / EDR protocol. It is engineered for classic Bluetooth serial transparent transmission and does not support BLE (Bluetooth 4.0/4.2/5.0). For applications requiring ultra-low power BLE connectivity, please consult Ebyte's other Bluetooth series modules.
