Bus topology is a foundational network architecture used in industrial automation and IoT deployments to connect multiple nodes via a single shared communication backbone. This technical guide breaks down the underlying operational mechanics of bus topology, compares it against star topology, details critical engineering parameters like impedance matching and termination resistors, and explores real-world field applications using RS485 and CAN transceivers. Additionally, it provides practical field troubleshooting steps for common bus faults and includes structured Schema code for AI Search engine optimization.
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LoRa Wireless Module
Industrial LoRa Wireless Modules: Long-Range & Low-Power IoT Connectivity
Ebyte offers a specialized portfolio of high-performance LoRa wireless modules designed for robust and secure data transmission. Operating across global sub-GHz bands (433MHz, 868MHz, 915MHz) and 2.4GHz, our modules leverage Semtech’s advanced spread-spectrum technology to provide superior link budgets and exceptional interference immunity for long-range RF communication.
- Advanced Chipset Integration: Our series integrates industry-leading silicon, including the E22 series (SX1262) and the cost-effective E220 series (LLCC68), delivering communication distances of up to 10km+ with high receiving sensitivity.
- Versatile Hardware Interfaces: We provide flexible integration options including SPI modules for deep hardware customization and UART (TTL) modules with transparent transmission protocols for rapid development.
- Industrial-Grade Reliability: Engineered for harsh environments, these modules feature a wide operating temperature range of -40°C to +85°C, high-precision TCXO oscillators, and are compliant with CE, FCC, and RoHS standards.
- Ultra-Low Power Consumption: Optimized for battery-powered end-nodes, our low-power RF modules support multiple sleep modes and Wake-on-Radio (WOR) functionality to maximize field deployment lifespan.
1. How to Select LoRa Wireless Module?
You can quickly filter the most suitable LoRa module through the following 4 dimensions:
| Screening Dimension | Options & Corresponding Product Line |
|---|---|
| Interface Type | • UART Transparent → UART LoRa Series (plug-and-play, no RF development required)
|
| Frequency Band | • Sub-1GHz (433/470/868/915MHz) → Most long-range models, better wall penetration
|
| Transmission Range | • Short range (<3km) → E220, E53 and other low-power compact models
|
| Special Function | • Mesh self-organizing network → E52 LoRa Mesh Series
|
2. Detailed Parameter Comparison Tables
Table 1: UART Transparent LoRa Modules (Plug-and-Play)
Built-in MCU with mature transparent transmission firmware, directly connected via TTL UART, no RF driver development required. Ideal for rapid project validation and mass production.
| Series (Typical Model) | Chipset | Frequency Band | TX Power Range | Max LOS Distance | Air Data Rate | Supply Voltage | Interface | Key Features |
|---|---|---|---|---|---|---|---|---|
| E22 Series
|
SX1262 / SX1268 | 160–930MHz
|
22–30dBm | 5–10km | 0.3–62.5 kbps | DC 2.0–5.5V | UART (TTL) | AES encryption, LBT, air wake-up, deep sleep, wide industrial temperature |
| E32 Series
|
SX1276 / SX1278 | 160–931MHz
|
22–37dBm | 3–25km | 0.3–19.2 kbps | DC 3.3–5.5V | UART (TTL) | Classic high-reliability model, strong anti-interference, fixed-point & broadcast transmission |
| E220 Series
|
LLCC68 | 410–930MHz
|
20dBm | 2.5km | 0.3–62.5 kbps | DC 2.0–5.5V | UART (TTL) | Ultra-compact size, cost-effective, ultra-low standby power |
| E52 Mesh Series
|
— | 433/868/915MHz | 10–20dBm | 1.6–4km per hop | 7–62.5 kbps | DC 3.3–5.5V | UART (TTL) | Decentralized LoRa Mesh, multi-hop relay, self-healing, up to 46 nodes |
| E610 Series
|
EFR32FG23 | 433/868/915MHz | 20/30dBm | 1–2km (continuous)
|
High speed | DC 3.3–5.5V | UART (TTL) | High-speed continuous transmission, low latency, for real-time data scenarios |
Table 2: SPI RF Front-end LoRa Modules (Custom Development)
Pure RF transceiver controlled via SPI bus, suitable for developers who need to design custom protocols and firmware. E48/E49 Series UART transparent transmission versions are available in the same series.
| Series (Typical Model) | Chipset | Frequency Band | TX Power Range | Max LOS Distance | Supply Voltage | Interface | Key Features |
|---|---|---|---|---|---|---|---|
| E22/E32 SPI Series | SX1262 / SX1268 / SX1276/78 / LLCC68 | 160–930MHz | 20–33dBm | 3–8km | DC 1.8–3.7V | SPI | Flexible development, support LoRa/GFSK/FLRC modulation, industrial grade |
| E29/E290 Series | PAN3029 / PAN3060 | 410–510MHz | 20–30dBm | 5–16km | DC 2.0–3.6V | SPI | Domestic chip solution, DSSS, strong anti-interference, high cost performance |
| E48/E49 Series | CT230A / CT2310A | 410–510MHz / 850–930MHz | 20–30dBm | 2.5–5.5km | DC 2.0–3.6V | SPI | Domestic chip, mini package, suitable for embedded integration |
Table 3: SoC Integrated LoRa Modules (Secondary Development)
Integrate MCU and LoRa RF on a single chip, support user secondary development, reduce system size and BOM cost.
| Series (Typical Model) | Chipset | Frequency Band | TX Power | Max LOS Distance | Core | Supply Voltage | Key Features |
|---|---|---|---|---|---|---|---|
| E77 Series | STM32WLE5CCU6 | 410–510MHz / 850–930MHz | 22dBm | 3.5–6.5km | ARM Cortex-M4 | DC 2.0–3.6V | ST official solution, high integration, support LoRa and custom protocol |
| E78 Series | ASR6601 | 410–925MHz | 22dBm | 5.6km | ARM Cortex-M4 | DC 2.0–3.6V | Support LoRa & LoRaWAN dual protocol, low power, ideal for LoRaWAN nodes |
Table 4: 2.4GHz LoRa Modules
Operate in the 2.4GHz global ISM band, with higher data rate, suitable for scenarios requiring both distance and transmission speed.
| Series (Typical Model) | Chipset | Frequency Band | TX Power Range | Max LOS Distance | Interface | Key Features |
|---|---|---|---|---|---|---|
| E28 2.4G Series | SX1281 | 2400–2500MHz | 12 / 20 / 27dBm | 3–16km | UART / SPI | 2.4GHz LoRa modulation, high data rate, support ranging and FLRC mode |
Table 5: LoRaWAN Gateway Modules
Core RF front-end module for building LoRaWAN gateway base stations, support multi-channel parallel reception.
| Series (Typical Model) | Chipset | Frequency Band | TX Power | Max LOS Distance | Interface | Key Features |
|---|---|---|---|---|---|---|
| E106 Gateway Series | SX1302 | 433/470/868/915MHz | 27dBm | 5km | SPI | 8-channel LoRaWAN gateway chip, high sensitivity, support PoE power supply (baseboard) |
3. Quick Selection Steps
- Confirm interface type: Choose UART for fast deployment; choose SPI/SoC for custom development; choose gateway module for base station construction.
- Confirm frequency band: Choose Sub-1GHz for maximum transmission distance and penetration; choose 2.4GHz for global license-free band and higher data rate.
- Match transmission distance: Select the corresponding power grade according to actual communication distance and environmental occlusion.
- Match special functions: Select Mesh model for multi-point ad-hoc network; select LoRaWAN model for standard protocol networking.
- Verify environmental requirements: For harsh industrial sites, prioritize models with wide temperature range and ESD protection.
Ebyte’s LoRa solutions are the trusted choice for global engineers in Industrial Automation (PLC wireless links), Smart Agriculture (remote soil and irrigation monitoring), and Remote Sensing (smart utility metering and environmental data collection). Whether you require a high-power 30dBm transmitter or a compact SMD transceiver, our products deliver the industrial-grade stability required for mission-critical IoT ecosystems.
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