E32-433T30D-V8 is a professional-grade 1W (30dBm) LoRa wireless serial module based on the SX1278 chip, designed for ultra-long-range 8km communication in the 433MHz ISM band with superior interference resistance and high sensitivity for industrial IoT environments.
| Key Parameter | Specification |
|---|---|
| Model Number | E32-433T30D-V8 |
| Core Chip / Tech | Semtech SX1278 (LoRa Spread Spectrum) |
| Operating Frequency | 410 – 441 MHz (Default: 433MHz) |
| RF Transmit Power | 21 – 30 dBm (Up to 1W) |
| Communication Range | Up to 8 km (Line-of-Sight) |
| Receiving Sensitivity | -148 dBm @ 0.3kbps |
| Interface Type | UART TTL (3.3V Logic) |
Download Manual
E32-433T30D Manual
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Integration Notes
- Requires external microcontroller for protocol handling
- Antenna options: 433MHz whip/PCB antenna (gain 2-5dBi)
- Configurable via AT commands over UART
Key Specifications
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 410~441 MHz | Default: 433MHz |
| Transmitting power | 21~30 dBm | Default: 30dBm（About 1W） |
| Receiving sensitivity | -147 dBm | Air data rate: 0.3kbps |
| Air data rate | - | - |
| Test distance | 8000 meter | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m |
| Hardware Parameter | Value | Remark |
|---|---|---|
| Size | 24 * 43 mm | Without SMA |
| Antenna type | SMA-K | |
| Communication interface | UART | Baud rate: 1200~115200, default: 9600 |
| Package | DIP | |
| Buffer | 512 bytes buffer | Automatically sub-packaging with 58 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition | |
|---|---|---|---|---|---|---|
| Power supply | 3.3 | 5.0 | 5.2 | V | ≥5.0 V ensures output power | |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk ofburning down | |
| Transmitting current | - | 106 | Instant powerconsumption | mA | Instant power consumption | |
| Receiving current | - | 15 | - | mA | - | |
| Turn-off current | - | 4 | - | μA | Software is shut down | |
| Operating temperature | -40 | - | +85 | ℃ | ||
| Max Tx power | 19.0 | - | 20.0 | dBm | - | |
| Air data rate | - | - | -- | bps | Controlled via user’s programming |
Application
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Precision Agriculture & Irrigation: In expansive outdoor farmlands, the E32-433T30D-V8 leverages its 30dBm transmit power to maintain stable links over 8km, even through dense crop canopies. This solves the connectivity gap for remote moisture sensors and valve controllers without the need for high-cost cellular networks.
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Industrial Smart Utility Metering: For water and gas meters located in deep-indoor or underground environments, the module's LoRa spread spectrum technology provides a penetration capability 3x stronger than traditional FSK. It effectively overcomes concrete walls and high interference in urban utility grids.
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Smart Parking Sensor Networks: In large-scale parking facilities, the module’s adaptive interference resistance ensures data from ultrasonic or vacancy sensors reaches the central gateway accurately, even in the noisy 433MHz ISM band where heavy automotive electronics are present.
FAQ
Q: Why is a minimum 5.0V power supply recommended for the E32-433T30D-V8 even though the logic is 3.3V?
A: The RF power amplifier stage requires a higher voltage to reach the maximum output of 30dBm or 1 watt. While the module can operate at lower voltages like 3.3V, the transmitting power will significantly drop because the internal voltage regulator cannot supply enough current for high-power amplification. Using a stable 5.0V supply ensures consistent long-range performance and prevents voltage dips during peak transmission current of 120mA.
Q: How does logic level compatibility work when connecting to a 5V microcontroller?
A: The communication level of this module is typically 3.3V TTL. When interfacing with a 5V MCU, you must use a logic level converter or a series resistor to protect the RXD and TXD pins. Direct connection to 5V logic signals poses a high risk of burning down the CMOS gate of the SX1278 chip due to excessive voltage stress on the I/O pins.
Q: What is the benefit of the 512-byte buffer in high-speed industrial data acquisition?
A: The 512-byte buffer allows the module to handle continuous UART data streams even if the RF air data rate is slower than the serial baud rate. It automatically breaks down large data packets into 58-byte sub-packages for reliable air transmission, ensuring that the external MCU does not need to manage complex timing or packet fragmentation, which simplifies integration in real-time monitoring systems.
