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Wireless Module
SI4438 RF chip
half-duplex
Wireless Module
SI4438 RF chip
half-duplex
SI4463 Low Price Rf Transceiver Type Rf Chip Type Chip Type Wireless

[IC]：SI4438

[Frequency]：425～525MHz

[Power]：20dBm

[Distance]：2.5km

[Size]：20*14mm

[Introduction]：E30-400M20S is a hardware module (SPI) based on the SI4438 RF chip imported from Silicon Labs. It is a half-duplex, SMD integrated transceiver with transparent transmission available. With working frequency band 425～525MHz, transmitting power 100mW, it is suitable for a variety of environments.

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1
Pin No. Item Direction Description
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 GPIO_2 Output    Configurable universal GPIO port (see SI4463manual for details)
7 GPIO_3 Output    Configurable universal GPIO port (see SI4463manual for details)
8 GPIO_1 Output    Configurable universal GPIO port (see SI4463manual for details)
9 VCC -    Power supply, 2.5~3.6V, 3.3V is recommended (It is also recommended to add external ceramic filter capacitor)
10 GND -    Ground wire, connected to the power reference ground
11 GND -    Ground wire, connected to the power reference ground
12 GND -    Ground wire, connected to the power reference ground
13 GPIO_0 Output    Configurable universal GPIO port (see SI4463manual for details)
14 IRQ Output    SPI interrupt request
15 SDN -    Shutdown Input Pin. It is low level when working(See SI4463 manual for more details)
16 MISO Output    SPI master output slave input
17 MOSI Input    SPI master input slave output
18 SCK Input    Serial Clock Input
19 NSEL Input    SPI Chip select for starting SPI communication
20 GND -    Ground wire, connected to the power reference ground
21 ANT Input/Output    Antena
22 GND -    Ground wire, connected to the power reference ground