[Chip solution]：SX1262
[Communication distance]： 16km
[Product size]：24*38.5mm
[Product weight]：5.1g±0.1g
[Introduction]：E22-900M33S is independently developed based on the new generation LoRa radio frequency chip SX1262 produced by Semtech in the United States. It has a maximum power of 2W and is suitable for 868/915MHz patch-type LoRa wireless modules. It uses an industrial-grade high-precision 32MHz crystal oscillator. Compared with the previous generation LoRa transceiver, the anti-interference performance and communication distance have been improved, further widening the gap with products with FSK and GFSK modulation methods. This product can cover an ultra-wide applicable frequency range of 850 to 930MHz and is backward compatible with SX1278 and SX1276. Since this module is a pure radio frequency transceiver module, it needs to use an MCU driver or a dedicated SPI debugging tool.
| Main parameters | Performance | Remark | |
| Minimum value | Maximum value | ||
| Supply voltage (V) | 3.3 | 5.5 | Exceeding 5.5V will permanently burn the module |
| Blocking power (dBm) | - | 10 | Less likely to be burned if used at close range |
| Working temperature (℃) | -40 | 85 | Industrial grade |
| Main parameters | Performance | Remark | |||
| Minimum value | Typical value | Maximum value | |||
| Supply voltage (V) | 3.3 | 5 | 5.5 | ≥5.0V guaranteed output power | |
| Communication level (V) | - | 3.3 | - | Using 5V TTL risks burning out | |
| Working temperature (℃) | -40 | - | 85 | Industrial grade design | |
| Working frequency band (MHz) | 850 | 868/915 | 930 | Support ISM band | |
| Power consumption | Emission current (mA) | - | 1200 | - | ±100mA(33dBm&5V) |
| Receive current (mA) | - | 15 | - | - | |
| Sleep current (uA) | - | 2 | - | Software shutdown | |
| Maximum transmit power (dBm) | 32.5 | 33 | 33.5 | The output power of the RF chip cannot be greater than 9dBm | |
| Receiving sensitivity (dBm) | -134 | -135 | -136 | LoRaSF9 | |
| Main parameters | Description | Remark |
| reference distance | 16km | Sunny and open space, antenna gain 5dBi, antenna height 2.5 meters, air rate 0.3kbps |
| FIFO | 256Byte | Maximum length of a single send |
| Crystal frequency | 32MHz | - |
| Modulation | LoRa(recommended) | - |
| Packaging method | SMD type | - |
| Interface mode | 2.54mm | stamp hole |
| Communication Interface | SPI | 0～10Mbps |
| Dimensions | 38.5*24mm | - |
| Antenna interface | Stamp hole/IPEX | Equivalent impedance is about 50Ω |
| weight | 5.1g | ±0.1g |
Practical Application Scenarios
1. Smart Grid and Utility Infrastructure
In wide-area electricity or gas monitoring, this module provides the critical link for outdoor utility meters. Its high link budget and 2W power output allow for robust signal penetration in urban settings, ensuring data continuity for SCADA systems even when nodes are obscured by high-density infrastructure.
2. Large-scale Agricultural Monitoring
For vast crop management, this module is integrated into wireless sensor nodes measuring soil moisture, pH levels, and localized weather data. By covering distances up to 16km, it significantly reduces the number of required gateways, providing a cost-effective solution for monitoring expansive and remote agricultural terrain.
3. Industrial Asset Tracking and Geo-Fencing
This transceiver enables long-range monitoring of heavy machinery or shipping containers in logistics hubs. By utilizing the LoRa spread spectrum technology, it maintains a stable connection through heavy metallic interference, ensuring continuous location reporting and status telemetry for high-value industrial assets.
FAQ Section
1. How does the SX1262 differ from the older SX1276/SX1278 chips?
The SX1262 chipset offers improved power efficiency and increased sensitivity compared to the legacy SX127x series. It provides a more advanced internal power management system, leading to better battery life and superior link budget, while maintaining a footprint that allows for design-in compatibility.
2. Can I use this module to replace existing SX127x designs?
Yes, the E22-900M33S is engineered to be backward compatible with SX1278 and SX1276-based systems. However, users should perform a software verification to ensure registers and timing parameters are correctly configured for the newer SX1262 architecture to take full advantage of its improved performance.
3. What design considerations are necessary for the 2W transmission power?
Operating at 2W (33dBm) requires a high-quality power supply capable of handling peak current draws without voltage drops. It is essential to ensure that your PCB layout includes robust power decoupling and a well-designed ground plane to dissipate heat and prevent signal integrity issues during long-duration transmission cycles.
