[Transmitting power]:20dBm
[Communication distance]:5km
[Product size]:38*23mm
[Product weight]:7.1±0.2g
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 |