EWM47-400M20S BC3603 chip solution New SPI Wireless Transmission Module SPI interface Low power Long-distance transmission
[Chip Solution]：BC3603
[Operating Frequency]：410-510MHz
[Transmit Power]：20dBm
[Communication Distance]：3km
[Size]：20 x 14mm
[Weight]：1.5 ± 0.1g
[Introduction]：The EWM47-M series is a low-cost, high-performance wireless transmission module independently developed by Ebyte using the new generation domestic RF chip BC3603. It has a built-in industrial-grade high-precision crystal oscillator, is suitable for 433MHz and 470MHz frequency bands, and supports multiple modulation methods such as OOK and GFSK, meeting the needs of users in smart homes, wireless meter reading, scientific research and medical treatment, as well as medium and long-distance wireless communication equipment.
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| Pin number | Pin Name | Pin direction | Pin Purpose |
| 1 | GND | Ground wire, connected to the power reference ground | |
| 2 | GND | Ground wire, connected to the power reference ground | |
| 3 | GND | Ground wire, connected to the power reference ground | |
| 4 | GND | Ground wire, connected to the power reference ground | |
| 5 | GND | Ground wire, connected to the power reference ground | |
| 6 | NC | No connection required | |
| 7 | NC | No connection required | |
| 8 | NC | No connection required | |
| 9 | VCC | Power supply, range 1.8V~3.6V (it is recommended to add external ceramic filter capacitors) | |
| 10 | NC | No connection required | |
| 11 | GND | Ground wire, connected to the power reference ground | |
| 12 | GND | Ground wire, connected to the power reference ground | |
| 13 | NC | No connection required | |
| 14 | GIO3 | BC3603 chip pins, see the official chip user manual for details | |
| 15 | GIO2 | BC3603 chip pins, see the official chip user manual for details | |
| 16 | MISO/GIO1 | Output | SPI data output pin |
| 17 | MONEY | input | SPI data input pin |
| 18 | SCK | input | SPI clock input pin |
| 19 | CSN | input | Module chip select pin, used to start an SPI communication |
| 20 | GND | Ground wire, connected to the power reference ground | |
| 21 | ON | Input/Output | Antenna interface, stamp hole (50 ohm characteristic impedance) |
| 22 | GND | Ground wire, connected to the power reference ground |