[Interface type]：UART
[Transmitting power]：20dBm
[Communication distance]：2.5km
[Dimensions]： 26*16*3mm
[Product weight]：1.23±0.1g
[Introduction]：E50-900NW20SX wireless module is an ideal solution for IoT wireless connectivity below 1GHz for smart home, security, lighting, building automation and metering. The module is equipped with Silicon Labs' EFR32FG23 series chips, which can achieve wireless broadcasts up to 0.3~2.5 kilometers with minimal data loss in dense urban and canyon environments. At the same time, the module also carries firmware that supports WM-BUS bus technology. The wireless module firmware is developed based on the EN13757-4/3 European standard, which can realize seamless SUB-GHz RF communication protocols between smart general meters, data concentrators, mobile meter reading equipment and heat distribution meters.
| RF Parameters | Parameter Value | Notes |
| Working frequency band | 868 MHz | Different working modes, working at different frequencies |
| Transmitting power | 20 dBm | Command adjustable |
| Receive sensitivity (GFSK) | -125 dBm | 2.4 kbps, GFSK signal, Δf = ± 1.2 kHz, BER < 0.1% |
| Measured distance | 2.5 km | Clear and open, antenna gain 3.5dBi, height 1.5 m, frequency 868.33MHz, airspeed 4.8kbps |
| Hardware Parameters | Parameter Value | Notes |
| IC full name | EFR32FG23A020F256GM40-B | Other models in the same series can be replaced, welcome to consult and customize |
| Core | ARM Cortex®-M33 | Main frequency 78MHz, high-performance 32-bit ARM processor, with DSP instructions and floating-point unit |
| FLASH | 256 KByte | Other models in the same series can be replaced, up to 512 KByte, welcome to consult and customize |
| RAM | 32 KByte | Other models in the same series can be replaced, up to 64 KByte, welcome to consult and customize |
| Crystal frequency | 39MHz/32.768KHz | The module is connected inside |
| Size | 16(L) * 16(W) * 3(H) mm | - |
| Antenna type | IPEX/Stamp Hole | Equivalent impedance is about 50Ω |
| Communication interface | UART | Support hardware flow control RTS, CTS pins |
| Packaging method | Patch Stamp Hole | Pin spacing 1.27mm |
| Weight | 1.23g | - |
| Electrical Parameters | Min. | Typ. | Max. | Unit | Remarks |
| Power supply voltage | 2 | 3.3 | 3.8 | V | ≥3.3V can guarantee output power, exceeding 3.8V may damage the module |
| Communication level | - | 3.3 | - | V | Using 5.0VTTL, it is recommended to add level conversion |
| Transmit current | 60 | 65 | 70 | mA | ≤70mA@3.3V/20dBm, instantaneous power consumption |
| Receive current | 5 | 5.5 | 6 | mA | ≤6mA@3.3V/20dBm/EM0 |
| Sleep current | - | 1.8 | 2 | μA | ≤2uA@3.3V/20dBm/EM2 |
| Operating temperature | -40 | - | 85 | ℃ | - |
| Operating humidity | 10 | - | 90 | % | - |
| Storage temperature | -50 | - | 150 | ℃ | - |
