E32-433T30D Product Details
433MHz LoRa spread spectrum module with 30dBm output power and 8km line-of-sight range for industrial IoT applications.
- LoRa Spread Spectrum：3× longer range than FSK modules at same power
- Adaptive Interference Resistance：Maintains connectivity in noisy 433MHz ISM band
- Low-Power Design：8.2g lightweight package for embedded deployments
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E32-433T30D Datasheet
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Technical Specifications
- Frequency Range: 410-441MHz (Programmable channels)
- RF Power: 21-30dBm (0.1-1W adjustable)
- Max Range: 8km (Open area w/ 5dBi antenna)
- Interface: UART TTL (3.3V logic)
- Sensitivity: -148dBm @ 0.3kbps
- Data Rate: 0.3-19.2kbps (LoRa modulation)
- Power Consumption: 120mA@30dBm TX, 30mA RX
- Operating Temp: -40°C to +85°C
- Certifications: CE, FCC, RoHS
Industrial Applications
- Smart parking sensor networks (ultrasonic/vacancy detection)
- Agricultural irrigation system monitoring
- Remote utility meter reading (water/gas)
- Construction site equipment tracking
Integration Notes
- Requires external microcontroller for protocol handling
- Antenna options: 433MHz whip/PCB antenna (gain 2-5dBi)
- Configurable via AT commands over UART
| 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) |
| 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 |
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.
