[Transmitting power]：20dBm
[Communication distance]：5km
[Product size]：38*23mm
[Product weight]：7.1±0.2g
[Introduction]：EWM290-400R20D is a new generation of domestic LORA module developed by Ebyte. It is based on the PAN3060 RF chip of Panqi Micro. The RS485 interface module works in the frequency band (410.125～493.125MHz) (default 433.125MHz), supports DC 5V power supply, and can be used with the E290-T series of the same frequency band series for low-power applications. It adopts the new generation of ChirpIoT™ spread spectrum technology, supports half-duplex wireless communication, supports air wake-up, wireless configuration, automatic relay, communication key, AT command, IAP upgrade and other functions, and can provide customized development services.
| Radio frequency parameters | unit | EWM290-400R20D | Remark |
| Maximum transmit power | dBm | 20 | - |
| Reference distance | km | 5 | It is clear and spacious, with an antenna gain of 5dBi, an antenna height of 2.5 meters, and an air speed of 2.4kbps. |
| Working frequency band | MHz | 410.125～493.125 | Supports ISM bands |
| Air speed | bps | 2.4k ～ 64.5k | User Programming Control |
| Electrical parameters | unit | EWM290-400R20D | Remark | |
| Operating voltage | V | 4.5~5.5 | ≥5V can guarantee the output power, and if it exceeds 5.5V, there is a risk of burning the module. | |
| Power consumption | Emitting current | mA | 95 | Instant power consumption |
| Receive current | mA | 10 | - | |
| Sleep current | uA | 590 | - | |
| temperature | Operating temperature | ℃ | -40～+85 | Industrial design |
| Storage temperature | ℃ | -40～+85 | Industrial design | |
| Hardware parameters | EWM290-400R20D | Remark |
| Crystal oscillator frequency | 32MHz | Industrial-grade high-precision crystal oscillator |
| Modulation method | LoRa | The new generation of LoRa modulation technology |
| Interface method | PH2.0 | Spacing 2.0mm, reserved 2.54mm holes |
| Communication interface | RS485 interface | - |
| Emission length | 240 Byte | Subcontract 32/64/128/240 bytes can be set through instructions |
| Packaging method | Pin type | - |
| Cache capacity | 500Byte | - |
| Antenna interface | SMA-K | Equivalent impedance is about 50Ω |
| size | 38*23mm | ±0.2mm |
| Net weight of product | 7.1g | ±0.2g |
