Módulo inalámbrico E42-400M20S, tamaño pequeño, bajo consumo de energía, 433/470MHz, transceptor RF, módulo de control remoto HW3000
[Solución de chip]：HW3000
[Frecuencia de trabajo]：428 ~ 522MHz
[Potencia de transmisión]：20 dBm
[Distancia de comunicación]：2,5 km
[Tamaño del producto]： 20*14mm
[peso]：2.2±0.1g
[Introducción]：E42-400M20S es un módulo de hardware SPI diseñado en base al chip RF HW3000 original de Shanghai Neusoft Carrier Microelectronics. Es semidúplex, integra transceptor y receptor, modo de transmisión transparente, tipo de parche, banda de frecuencia operativa de 428 ~ 522 MHz y potencia de transmisión de 100 mW. Adecuado para una variedad de entornos, con alta sensibilidad de recepción, fuerte antiinterferencia y admite el desarrollo de un bajo consumo de energía.
| Pin number | Pin name | Pin direction | Pin usage |
| 1 | GND | GND | Ground wire, connected to the power reference ground |
| 2 | GND | GND | Ground wire, connected to the power reference ground |
| 3 | GND | GND | Ground wire, connected to the power reference ground |
| 4 | GND | GND | Ground wire, connected to the power reference ground |
| 5 | GND | GND | Ground wire, connected to the power reference ground |
| 6 | GPIO2 | input /Output | General digital I/O (see HW3000 chip manual for function details) |
| 7 | GPIO3 | input /Output | General digital I/O (see HW3000 chip manual for function details) |
| 8 | GPIO1 | input /Output | General digital I/O (see HW3000 chip manual for function details) |
| 9 | VCC | VCC | Power supply, range 2.0V~3.6V (it is recommended to add external ceramic filter capacitors) |
| 10 | GND | GND | Ground wire, connected to the power reference ground |
| 11 | GND | GND | Ground wire, connected to the power reference ground |
| 12 | GND | GND | Ground wire, connected to the power reference ground |
| 13 | GPIO0 | input /Output | General digital I/O (see HW3000 chip manual for function details) |
| 14 | IRQ | output | Interrupt output pin (polarity configurable, default low level active) |
| 15 | PDN | input | POWER DOWN mode enable input pin (active high level) |
| 16 | MISO | output | SPI data output pin |
| 17 | MOSI | input | SPI data input pin |
| 18 | SCK | input | SPI clock input pin |
| 19 | CSN | input | SPI chip select signal (active low level) |
| 20 | GND | GND | Ground wire, connected to the power reference ground |
| 21 | ANT | — | Antenna connector, stamp hole (50 ohm characteristic impedance) |
| 22 | GND | GND | Ground wire, connected to the power reference ground |