The Ebyte E103-W03 is an ultra-low power serial to Wi-Fi module based on the TI CC3220R SoC, operating at 2.412 to 2.472GHz IEEE 802.11 b/g/n, delivering 18dBm output power with 180m transmission distance, 12uA hibernate sleep current, onboard PCB and IPEX dual antenna options, and UART transparent transmission supporting AT commands and MQTT protocol for industrial IoT applications.
| Technical Parameter | E103-W03 (PCB Onboard Antenna) | E103-W03 (IPEX External Socket) |
|---|---|---|
| Main Controller Chip | Texas Instruments CC3220R | Texas Instruments CC3220R |
| RF Frequency Range | 2.412 to 2.472 GHz (2.4G ISM Band) | 2.412 to 2.472 GHz (2.4G ISM Band) |
| Wi-Fi Standard Protocol | IEEE 802.11 b/g/n | IEEE 802.11 b/g/n |
| Max Transmit Power | 18 dBm (Approx. 100mW) | 18 dBm (Approx. 100mW) |
| Measured Range | 160 meters (Open sight, height 2m) | 180 meters (Open sight, height 2m) |
| Supply Voltage | 2.3V to 3.6V DC (3.3V typical) | 2.3V to 3.6V DC (3.3V typical) |
| Power Consumption | TX: 260mA / RX: 78mA / Sleep: 12uA | TX: 260mA / RX: 78mA / Sleep: 12uA |
| Antenna Interface | PCB Onboard Trace Antenna (50 Ohm) | IPEX Generation 1 Socket (50 Ohm) |
| Communication Interface | UART Serial Port (3.3V TTL level) | UART Serial Port (3.3V TTL level) |
| Network Protocols & Command | AT Commands / MQTT / TCP / UDP / Web | AT Commands / MQTT / TCP / UDP / Web |
| Dimensions / Weight | 27 x 19 x 2.7 mm / 2.2g (SMD) | 27 x 19 x 2.7 mm / 2.2g (SMD) |
| Operating Temperature | -40 to +85 degrees C (Industrial grade) | -40 to +85 degrees C (Industrial grade) |
| Main parameters | Min. | Typ. | Max. | Remark |
|---|---|---|---|---|
| Operating Voltage（V） | 2.3 | 3.3 | 3.6 | Recommended 3.3V power supply |
| communication level（V） | - | 3.3 | - | - |
| Operating temperature（℃） | -40 | - | +85 | Industrial grade design |
| Working frequency（Hz） | 2.412G | 2.442G | 2.472G | 2.4G frequency band |
| Maximum transmit power（dBm） | 17 | 18 | 18.5 | Test 2.412GHz |
| Maximum emission current（mA） | 257 | 260 | 268 | Instantaneous power consumption,DSSS 1Mbps，3.3V POWER |
| Receive current（mA） | - | 78 | - | Average power consumption received（2.412GHz） |
| Sleep current（μA） | - | 12 | - | hibernate. SOP1 is left floating or pulled low |
| Name | Value | Annotation |
|---|---|---|
| RF chip | CC3220R | TI |
| Module size | 27 * 19 * 2.7mm | - |
| Weight | 2.2g | - |
| PCB process | 4 | Impedance tuning |
| Working frequency | 2.4 ~ 2.484 GHz | - |
| Production Process | Lead-free process, machine sticker | Wireless products must be machine-mounted to ensure batch consistency and reliability |
| Interface | 1.27mm | SMD |
| Supply voltage | 2.3 ~ 3.6V DC | Note: Voltages higher than 3.6V will cause permanent damage to the module |
| Communication level | Max 3.6 | It is recommended that the difference from the supply voltage be less than 0.3V to reduce power consumption |
| Measured distance | 160m/180m | Module-to-module communication, clear and open, maximum power, height 2m, PCB antenna/Module-to-module communication, clear and open, maximum power, height 2m, PCB antenna |
| Transmit power | 18dBm | About 100mW |
| AT support | Built-in intelligent processing | Configuration parameters can be set or read through AT commands |
| Wi-Fi version | 802.11 b/g/n | - |
| Communication Interface | UART serial port | - |
| Antenna form | PCB Onboard Antenna/IPX Socket | 50Ω characteristic impedance, can be changed by yourself |
| Operating temperature | -40 ~ +85℃ | Industrial grade (chip range, please modify according to crystal parameters) |
| Working humidity | 10% ~ 90% | Relative humidity, non-condensing |
| Storage temperature | -40 ~ +85℃ | Industrial grade |
Practical Application Scenarios
1. Battery-Powered Medical and Healthcare Portable Monitoring Nodes
In hospital and healthcare telemetry applications, wearable or portable diagnostic devices require ultra-low power Wi-Fi connectivity to transmit patient vitals without draining battery packs. The E103-W03 utilizes Texas Instruments' CC3220R single-chip wireless MCU architecture to achieve a hibernate sleep current as low as 12uA. Interfacing with host MCUs via 3.3V TTL UART, it periodically wakes up to push telemetry data via MQTT over standard IEEE 802.11 b/g/n wireless infrastructure before returning to deep hibernate mode, drastically extending battery life.
2. Commercial HVAC and Smart Energy Metering Gateway Integration
Modern smart building management systems require compact serial-to-Wi-Fi modules to upgrade RS485/UART power meters and HVAC controllers for cloud connectivity. Operating across the industrial temperature range of -40 to +85 degrees C, the E103-W03 features a small 27x19mm SMD form factor that fits onto space-constrained control boards. In multi-floor installations where sub-GHz radio links like Ebyte LoRa DTUs are used for long-distance collection, the E103-W03 acts as the local edge bridge, forwarding serial Modbus data over local Wi-Fi networks to enterprise cloud platforms.
3. Industrial Automation & Warehouse AGV Equipment Diagnostics
In automated warehouses, Automated Guided Vehicles (AGVs) and robotic arms require compact, reliable Wi-Fi modules for status reporting and remote parameter configuration. The E103-W03 delivers up to 18dBm transmit power and supports IPEX external antenna connections to maintain connection stability inside high-density metal storage racks. Using simple AT commands, engineers can configure transparent UART transmission, allowing real-time motor diagnostic packets and error codes to be sent back to central SCADA systems.
FAQ Section
1. How does the TI CC3220R architecture in the E103-W03 enhance network security and power management compared to standard ESP-based Wi-Fi modules?
The E103-W03 leverages the Texas Instruments CC3220R SoC, which integrates two physically separated execution environments: a dedicated ARM Cortex-M4 application MCU and a distinct network processor subsystem. This hardware isolation provides robust enterprise-grade security features, hardware crypto engines, and dedicated network stacks. For power management, the dual-core architecture allows the network layer to manage Wi-Fi sleep states independently, enabling an ultra-low hibernate current of 12uA.
2. What network protocols and configuration methods are supported by the E103-W03 for fast IoT cloud onboarding?
The module features built-in smart firmware processing supporting standard AT commands, MQTT protocol, TCP Server/Client, UDP, and HTTP client modes. Developers can configure network parameters via UART serial port commands or through an integrated Web server page. This eliminates the need for developers to write complex Wi-Fi driver stacks on their primary host microcontroller.
3. What antenna options are available on the E103-W03 and how do they affect RF range performance?
The E103-W03 is available with two antenna configurations: an onboard PCB trace antenna and an IPEX generation 1 connector socket with 50 Ohm characteristic impedance. Under open line-of-sight test conditions at maximum 18dBm output power, the PCB antenna option achieves a communication range of up to 160 meters, while the IPEX option connected to a high-gain external antenna reaches up to 180 meters.
4. What are the electrical constraints on the supply voltage and serial interface logic levels?
The operating supply voltage for the E103-W03 ranges from 2.3V to 3.6V DC, with 3.3V DC being the recommended nominal voltage. Exceeding 3.6V DC will cause permanent damage to the TI CC3220R chip. Additionally, the UART communication logic level is 3.3V TTL; to minimize power consumption and prevent IO damage, the voltage difference between the serial logic and power supply should remain under 0.3V.
