In the field of IoT wireless communication, LoRa technology has become an important choice for LPWAN (Low-Power Wide-Area Network) due to its long-distance, low-power consumption, and strong anti-interference capabilities. The E22P-433M30S series products launched by Chengdu EBYTE Electronic Technology Co., Ltd. (EBYTE) provide developers with a complete solution from core RF modules to complete evaluation kits, greatly reducing the development threshold for LoRa technology applications. This article will deeply analyze the core modules and development tools of this series.

Overview of E22P-433M30S  LoRa RF Module

The E22P-433M30S is a patch-type LoRa wireless module independently developed based on Semtech's high-performance RF chip SX1268, representing EBYTE's mature design in LoRa RF technology.

Features and Technical Advantages

Excellent RF Performance

  • High Transmit Power: Maximum transmit power up to 30dBm (1W), providing strong signal coverage capability.

  • Long-Distance Communication: In clear and open environments, with a suitable antenna, the test distance can reach 12 kilometers (air speed 2.4kbps, antenna height 2 meters).

  • High Receiving Sensitivity: Benefiting from the built-in RF front-end module (RF FEM, including PA, LNA, and RF switch), the receiving sensitivity is significantly improved, and the overall communication stability is far superior to products without amplifiers.

  • Strong Anti-Interference Capability: Adopting the new generation of LoRa modulation technology, it has a qualitative improvement in anti-interference performance and communication distance compared with traditional FSK and GFSK products.

Flexible Hardware Design

  • Operating Frequency Band: Supports 429～440MHz (default 433MHz), and supports user-customized frequency bands.

  • Interface Method: Uses 1.27mm stamp hole packaging, which is convenient for patch welding, with a size of 38.5mm × 24mm.

  • Communication Interface: SPI interface (0～10Mbps), requiring an external MCU driver.

  • Antenna Form: Provides two antenna connection methods: IPEX-1 generation interface and stamp hole.

Industrial-Grade Reliability

  • Wide Temperature Operation: Operating temperature range of -40℃ ~ +85℃, meeting industrial-grade standards.

  • High-Precision Clock: Uses a 32MHz high-precision active temperature-compensated crystal oscillator (TCXO) internally to ensure frequency stability.

  • Low-Power Design: Receiving current is about 24mA, and sleep current is as low as about 2uA, suitable for battery-powered applications.

Rich Configurable Parameters

  • Multi-Level Adjustable Power: The transmit power can be flexibly adjusted among multiple levels to balance communication distance and power consumption.

  • Programmable Air Rate: Supports air rates from 0.018 to 62.5kbps, which users can program and control according to their needs.

Typical Application Scenarios

  • Long-Distance Data Collection: Smart agriculture, environmental monitoring, smart oil fields.

  • Industrial Automation: Equipment status monitoring, remote control, wireless sensor networks.

  • Smart Meters: Remote meter reading of water meters, gas meters, and electricity meters.

  • Security Alarms: Perimeter protection, wireless transmission of fire alarms.

Development Tool: E22P-433MBH-SC Evaluation Kit

To accelerate product development and evaluation processes, EBYTE simultaneously provides the E22P-433MBH-SC evaluation kit (also known as the "test board").

Core Value and Functions of the Evaluation Kit

Out-of-the-Box, Zero-Design Startup

  • Integrates the E22P-433M30S module, main control MCU (such as STM32), OLED display, buttons, Type-C interface, status indicators, etc., on one evaluation board.

  • Users do not need any hardware design and can immediately start functional testing through USB power supply.

Intuitive Human-Computer Interaction Interface

  • 0.96-inch OLED Display: Real-time display of current module configuration parameters (frequency, power, rate, etc.), test data, and version information.

  • Function Buttons: Through the three buttons of Up, OK, and Down, users can conveniently browse menus and modify parameters (such as frequency and power settings support continuous-click acceleration).

  • Status Indication: Independent TXD (transmit), RXD (receive), and PWR (power) indicators, which intuitively reflect the working status of the module.

  • Buzzer: Provides sound feedback for button operations.

Complete Testing and Debugging Interfaces

  • Test Resistor (TR): Removing this resistor can connect an ammeter in series to accurately test the working current of the module in different modes, facilitating power consumption analysis.

  • Type-C Interface: Used for power supply and serial communication, which can be directly connected to a computer for data transmission testing or parameter configuration.

  • Pin Leads: The key signals of the module such as SPI and GPIO are led out through pin headers, which is convenient for users to connect their own systems for in-depth integration testing.

Recommended Development Process

  1. Early Evaluation: Purchase the E22P-433MBH-SC evaluation kit for functional and communication performance testing.

  2. Prototype Development: Develop application logic and communication protocols based on the evaluation kit.

  3. Product Integration: After passing the test, directly integrate the E22P-433M30S RF module into the PCB of your own product.

Introduction to EBYTE RF Module Product Line

Chengdu EBYTE Electronic Technology Co., Ltd. has more than ten years of profound accumulation in the field of RF (Radio Frequency) modules, and its product line covers almost all mainstream wireless communication technologies, forming a complete product matrix:

LoRa Series (Focus of This Article)

  • Pure RF Modules: Such as E22, E22P, E220 series, based on chips such as SX1268/LLCC68, requiring MCU drivers, with a maximum power of 33dBm (2W).

  • UART Transparent Transmission Modules: Such as E22-xxxTxx series, built-in MCU and protocol stack, providing serial port AT commands to achieve "transparent transmission", which is the simplest to develop.

  • LoRaWAN Modules: Node modules that comply with the LoRaWAN standard protocol.

FSK/GFSK Series

  • Modules based on chips such as Si4463, A7139, and AX5243, such as E30, E31, E41 series, providing cost-effective short-to-medium distance data transmission solutions.

2.4GHz Series

  • nRF24L01+ Enhanced Type: Such as E01, E07 series, built-in PA/LNA, with a power of up to 27dBm (500mW).

  • Bluetooth/BLE Series: Supports Bluetooth 5.0/5.4, etc., including multiple types such as pure RF, audio, and transparent transmission.

Wi-Fi Series

  • Supports protocols such as 802.11b/g/n/ac, and provides Wi-Fi modules with multiple interfaces such as UART, SPI, and SDIO.

Zigbee Series

  • ZigBee3.0 transparent transmission modules based on chips such as TI CC2530, such as E18 series.

Specialized Wireless Series

  • Mesh ad-hoc network modules, wireless audio modules, millimeter-wave radar modules, GNSS positioning modules, etc.

EBYTE RF modules are known for their "industrial-grade, high-reliability, full-series" characteristics. They have passed international certifications such as FCC, CE, and RoHS, are sold to more than 50 countries and regions around the world, and are widely used in various fields of IoT, making them a trustworthy choice for engineers to achieve wireless connections.