[Working frequency]：855～925MHz
[Transmit power]： 20dBm
[Communication distance]：3.5km
[Product size]： 26*16mm
[Product weight]： 2.0±0.1g
[Introduction]：E48-900T20S is a domestic cost-effective wireless data transmission module launched by Chengdu Ebyte. It has 4 working modes. It has a variety of transmission methods and can be applied to various IoT application scenarios. The wireless module works in the 855~925MHz frequency band, has TTL level output, supports a maximum transmit power of 20dBm, and is compatible with 3.3V IO port voltage. It supports functions such as air wake-up, wireless configuration, relay networking, communication keys, etc. At the same time, the module has a data encryption function. Through strict encryption and decryption algorithms, it ensures data security and improves communication reliability and transmission efficiency.
| Electrical Parameter | Unit | Value | Remarks |
| Operating Voltage | V | 2.7V~5.5V | ＞3.3V Guaranteed output power |
| Communication level | V | 3.3 | Using 5V TTL has the risk of burning out |
| Emission current | mA | 110 | Instantaneous power consumption, @5V power supply |
| receive current | mA | 12 | @5V power supply |
| Sleep current | uA | 3.5 | Software shutdown |
| Operating temperature | ℃ | -40 ~ +85 | Industrial grade |
| Main parameters | value | Remark |
| Dimensions | 26*16mm | - |
| weight | 2.0g | ±0.1g |
| Launch length | 58 Byte | Subpackaging 58/116 bytes can be set through instructions to send |
| cache capacity | 1000 Byte | - |
| Modulation | GFSK | - |
| Communication Interface | UART serial port | TTL level |
| Packaging method | SMD type, stamp hole, pin spacing 1.27mm | - |
| Antenna interface | IPEX/stamp hole | - |
| RF parameters | unit | value | Remark |
| Working frequency | MHz | 410～450 | Support ISM band |
| Transmit power | dBm | 20±1 | Multi-level adjustable according to configuration parameters |
| blocking power | dBm | 0～10.0 | Less likely to be burned if used at close range |
| Receive sensitivity | dBm | -120±2 | Air rate 2.4kbps |
| Measured distance | km | 3.5km | Sunny and open, antenna gain 3.5dBi, antenna height 2.5 meters, air rate 2.4kbps |
| Air speed | kbps | 2.4～500 | Control based on configuration parameters |
