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The E22-230T33S is a new generation LoRa wireless module designed for various applications requiring reliable and secure long-distance communication. This module operates in the 220.125~236.125MHz frequency band, with a default setting of 230.125MHz, and utilizes SEMTECH's high-performance RF chip and LoRa spread spectrum technology to enhance communication range and anti-interference capabilities. It offers TTL level output and is compatible with both 3.3V and 5V IO port voltages, making it versatile for integration into different systems.
The E22-230T33S module supports a wide array of functionalities, making it suitable for diverse wireless communication needs. Its core function revolves around LoRa spread spectrum technology, which provides extended communication distances and robust anti-interference performance. The module is capable of automatic relay networking, allowing for multi-level relay setups that are ideal for long-distance communication scenarios and enabling multiple networks to operate simultaneously in the same area without significant interference.
For enhanced data confidentiality, users can set a communication key that cannot be read, thereby improving the security of transmitted information. The module also incorporates an LBT (Listen Before Talk) function, which monitors the channel environment for noise before transmitting data. This feature significantly boosts the communication success rate, especially in harsh environments where channel congestion might be an issue. Additionally, an RSSI (Received Signal Strength Indication) function is available, providing valuable information for assessing signal quality, optimizing communication networks, and even performing ranging applications.
The E22-230T33S supports wireless parameter configuration, allowing users to remotely configure or read module parameters by sending command packets wirelessly. This simplifies deployment and maintenance, especially in distributed systems. An air wake-up function enables ultra-low power consumption, making the module highly suitable for battery-powered applications where energy efficiency is critical. It supports various transmission modes, including fixed-point transmission, broadcast transmission, and channel monitoring, offering flexibility in how data is sent and received.
The module features a deep dormancy mode, where power consumption is extremely low, making it ideal for applications requiring extended battery life. Its operation in the 230 MHz power frequency band provides superior penetration and diffraction capabilities compared to higher frequency bands like 433 MHz. With a built-in PA (Power Amplifier) and LNA (Low Noise Amplifier), the module can achieve communication distances of up to 16km under ideal conditions.
The E22-230T33S is designed for ease of use and integration. Its TTL level output ensures compatibility with common microcontrollers and development boards. The module's parameters are saved internally, meaning it will operate according to the last configured settings even after power cycles, simplifying deployment. An efficient watchdog design ensures that the module automatically restarts in case of abnormal operation, maintaining continuous functionality based on the previously set parameters.
The module supports data transmission rates ranging from 2.4k to 15.6k bps, allowing for flexibility based on application requirements and desired communication speed versus range. It operates with a power supply of 3.3V to 5.5V, with 5V ensuring optimal performance. The industrial-grade design allows for long-term use in temperatures ranging from -40°C to +85°C, making it robust for demanding environments. Dual antenna options (IPEX / stamp hole) are available, facilitating secondary development and integration into various product designs.
The module offers four distinct working modes, controlled by the M1 and M0 pins:
Mode switching is designed to be flexible and efficient. Users can change modes by manipulating the M1 and M0 pins. The module processes any pending data (sending or receiving) before entering a new mode, ensuring data integrity. For instance, it can quickly switch to sleep mode after transmitting data without waiting for the AUX pin to go idle, saving MCU working time and reducing power consumption.
The E22-230T33S includes features that aid in monitoring and troubleshooting. The AUX pin provides crucial indications for wireless sending/receiving buffer status and self-test processes. It indicates whether the module has data awaiting wireless transmission, whether received wireless data has been fully transmitted via the serial port, or if the module is undergoing self-test initialization. This allows users to monitor the module's internal state and ensure proper operation.
During power-on or reset, the AUX pin outputs a low level for hardware self-test and parameter configuration, then transitions to a high level when the module is ready for normal operation. Users should wait for this high-level transition before initiating normal module operations.
The module's configuration software provides a user-friendly interface for setting parameters. It allows users to switch to command mode and quickly configure or read parameters. The software displays parameters in decimal mode, simplifying input for module addresses, frequency channels, network IDs, and keys. For relay network mode, the software handles the conversion of hexadecimal values to decimal for module addresses and network IDs, streamlining the setup process.
For hardware design, several recommendations are provided to ensure optimal performance and longevity. These include using a DC voltage regulator power supply with minimal ripple, ensuring correct polarity, and verifying that the supply voltage remains within the recommended range. It is also advised to allow for a power supply allowance of over 30% for long-term stability. Proper grounding and isolation from electromagnetic interference sources like power supplies, transformers, and high-frequency wiring are crucial. Careful routing of high-frequency digital, analog, and power lines is recommended to avoid affecting the module's stray capacitance and receiving sensitivity. If 5V communication lines are used, series resistors are suggested to mitigate damage risks. Keeping the module away from 2.4GHz TTL protocols like USB3.0 is also recommended.
Antenna installation is highlighted as a critical factor for performance. Ensuring the antenna is exposed and positioned vertically upwards is important. For installations within a casing, a high-quality antenna extension line can be used to position the antenna outside the casing. Metal enclosures should be avoided for antenna placement, as they can significantly weaken transmission distance.
Troubleshooting guidelines address common issues such as short communication range, module damage, and high bit error rates. These guidelines point to factors like obstacles, environmental conditions (temperature, humidity), co-channel interference, antenna quality, power supply stability, and correct parameter settings as potential causes, offering clear directions for maintenance and problem resolution.
General| Modulation | FSK |
|---|---|
| Transmission Power | 33dBm |
| Interface | UART |
| Data Rate | 0.3~19.2kbps |
| Operating Voltage | 3.3 V |
| Operating Temperature | -40°C to +85°C |
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