E51-900NW16S(BR) 868/915Mhz EFR32FG25 Chips Industrial loT Wireless Modules Supports WI-SUN/FAN1.1/OFDM
[Chip Solution]：EFR32FG25
[Operating frequency]：860-925 MHz
[Interface type]：UART
[Communication distance]： 2.5 km
[Size]：20 x 20 mm
[Product weight]：2 ± 0.1 g
[Introduction]：The E51 series IoT wireless module is a Wi-Sun module that provides long-distance, low-power transmission. It uses the EFR32FG25 series chip and supports the orthogonal frequency division multiplexing (OFDM) modulation technology introduced in the Wi-SUN field area network (FAN). It has a small form factor, rich interface resources, and support for user secondary development, making it widely applicable in the IoT industry.
Official Store| RF parameters | Parameter value | Remark |
| Operating frequency band | 470-510 MHz | Corresponding models: E51-470NW16S(NR), E51-470NW16S(BR) |
| 860-925 MHz | The corresponding models are: E51-900NW16S(NR), E51-900NW16S(BR), and support 868/915MHz European and American frequency bands. | |
| Transmit power | 16 dBm | Software adjustable, users need to develop and set it up by themselves |
| Receive sensitivity (GFSK) | -117.7 dBm | 10 kbps 2GFSK signal，Δf = ± 25 kHz，BER<0.1%2 |
| Receive sensitivity (OFDM) | -116.8 dBm | 10% packet error rate (PER) without interference, |
| OFDM Option4，MCS0，header MCS0，with PL = 20 octets | ||
| Measured distance | 2.5 km | Clear and open air, antenna gain 3.5dBi, antenna height 2 meters, air data rate 10kbps |
| Electrical parameters | Minimum | Typical values | Maximum | unit | Remark |
| Power supply voltage | 3 | 5 | 5.5 | In | ≥5.0V can guarantee output power, exceeding 5.5V may damage the module |
| Communication level | - | 3.3 | - | In | When using 5.0V TTL, it is recommended to add level conversion |
| Emission current | 73 | - | 81 | m.a. | Instantaneous power consumption |
| Receive current | 7.5 | - | 11 | m.a. | — |
| Operating temperature | -40 | - | 85 | ℃ | — |
| Operating humidity | 10 | - | 90 | % | — |
| Storage temperature | -50 | - | 125 | ℃ | — |
| Hardware Parameters | Parameter value | Remark |
| IC full name | EFR32FG25A121F1152IM56-B | Support OFDM, can be replaced with other models in the same series, welcome to consult |
| kernel | ARM Cortex®-M33 | Main frequency 97.5MHz, high-performance 32-bit ARM processor with DSP instructions and floating-point unit |
| FLASH | 1152 KB | Can be replaced with other models in the same series, supporting up to 1152 KB, welcome to consult |
| RAM | 256 KB | Can be replaced with other models in the same series, supporting up to 256 KB, welcome to consult |
| Crystal oscillator frequency | 39MHz/32.768KHz | The module is connected |
| Size | 20 * 20 mm | — |
| Antenna type | IPEX/Stamp Hole | Equivalent impedance is about 50Ω |
| Communication interface | UART | — |
| Packaging | Patch stamp hole | Pin spacing 1.27mm |
| weight | 2.07±0.1g | — |