[Frequency]：410.125~493.125MHz
[Power]：33dBm
[Distance]：16km
[Product weight]：25.9±0.1g
[Size]：37*60*7.6mm
Manual Download
E22-400T33D-V2 Manual
【PCB_Lib】E22-433T33D
Application Note
RF_setting_
Ebyte Company Profile
| Main parameters | Min. | Typ. | Max. | Remark | |
|---|---|---|---|---|---|
| Operating Voltage(V) | 3.3 | 5.0 | 5.5 | ≥4.7V Guaranteed output power | |
| Communication level(V) | - | 3.3 | - | There is a risk of burnout when using the 5V level | |
| Operating temperature(℃) | -40 | - | 85 | Industrial grade design | |
| Working frequency(MHz) | 410.125 | - | 493.125 | Support ISM band | |
| Emission current(mA) | 850 | 1000 | 1200 | Instantaneous power consumption@33dBm | |
| Receive current(mA) | 11 | 13 | 15 | - | |
| Sleep current(uA) | - | 2 | - | software shutdown | |
| Maximum transmit power(dBm) | 32 | 33 | 34 | - | |
| Receive sensitivity(dBm) | -126 | -128 | -130 | Air rate 2.4 kbps | |
| Air rate(bps) | 2.4k | 2.4k | 62.5k | User programming control |
| Working parameters | Performance | Remark |
|---|---|---|
| reference distance | 16km | Clear and open, antenna gain 5dBi, antenna height 2.5 meters |
| Launch length | 240 Byte | It can be sent in packets of 32/64/128/240 bytes by setting the instruction |
| Cache capacity | 1000 Byte | - |
| Modulation | LoRa | A new generation of LoRa modulation technology |
| Communication Interface | UART serial port | TTL level |
| Packaging method | Plugin | - |
| Interface | Plug-in pin header | Spacing 2.54mm |
| Dimensions | 37*60*7.6mm | Tolerance ±0.1mm (excluding pin header height) |
| RF interface | SMA | Equivalent impedance is about 50Ω |
Practical Application Scenarios
1. Smart City Environmental Monitoring Networks
In large-scale smart city deployments, this module serves as a backbone for air quality and noise pollution sensors. Its 16km range allows central gateways to aggregate data from sensors dispersed across metropolitan areas, minimizing the need for dense cellular network infrastructure and reducing recurring data subscription costs.
2. Remote Oil and Gas Wellhead Telemetry
The module's high transmit power (33dBm) is critical for oilfield applications where infrastructure is often situated in remote, flat, or rugged terrains. It enables the reliable transmission of critical pressure, flow, and temperature telemetry data from isolated wellheads to central control rooms, ensuring proactive maintenance and safety.
3. Smart Agriculture and Livestock Tracking
Designed for large-acreage farm management, this module supports long-range monitoring of soil moisture sensors and herd tracking systems. It effectively penetrates dense crop canopy and covers expansive rural estates, providing farmers with a robust wireless link that standard 2.4GHz modules cannot match in terms of distance or obstacle penetration.
FAQ Section
1. How does the 33dBm output affect the power supply design?
The 33dBm transmission requires a significant peak current. Engineers must ensure that the power source, especially when using a battery, can provide sufficient instantaneous current without causing a voltage drop below the 3.3V threshold. We recommend using a high-quality voltage regulator and adding a large decoupling capacitor (at least 100uF) as close as possible to the VCC input pin to stabilize the line during high-power bursts.
2. Is the UART interface directly compatible with 5V industrial PLCs?
Yes, the module is designed for versatile integration and supports a 3.3V to 5.5V supply voltage. The UART communication lines are optimized to interface with standard industrial logic levels. However, if your specific PLC setup operates with strict logic thresholds, verify the signal levels at the input buffer to ensure reliable data packet transmission without bit errors.
3. Why is the 410-493MHz band advantageous for long-distance communication?
Lower frequency Sub-GHz bands, such as the 400MHz range utilized by this module, offer superior diffraction and penetration characteristics compared to 2.4GHz or 5GHz bands. This allows the signal to travel further through vegetation, concrete, and topographical obstacles, making it the superior choice for high-reliability, long-range industrial wireless links.
