LOra Spreading High Sensitivity SX1278 Wireless Transceiver Module 433MHz

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$4.50 - $5.40 / Pieces | 10 Piece/Pieces (Min. Order)
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Overview
Quick Details
Place of Origin:
Guangdong, China (Mainland)
Brand Name:
VCHIP
Model Number:
VT-SX1278-433
Frequency:
428MHz~438MHz
Frequency Error:
±10ppm
Modulation:
FSK/OOK/LORA
Data Rate:
18bps~300kbps
Output Power:
-2dBm ~ +20dBm
Sensitivity:
-148dBm
Tx Current:
140mA
Rx Current:
14mA
Standby Current:
0.2uA
Distance:
2000 meters
Supply Ability
Supply Ability:
10000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
package
Port
shekou
Lead Time :
Shipped in 3 days after payment

LOra Spreading High Sensitivity SX1278 Wireless Transceiver Module 433MHz

 

VT-SX1278-433M is based on RF Transceiver SX1278 of SEMTECH,it’s a small size and ultra low power UHF wireless module. SX1278 is a low cost true single chip UHF transmitter designed for very low power wireless applications. The circuit is mainly intended for the ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) frequency bands at 315 and 433 MHz, The MAX RF output power can be set as high as +20dBm, with data rate as high as 300Kbps. The module integrated many RF functions thus you can use it conveniently and reducing your development time.

Detail Parameters

 

 

Test operating conditions:Ta=25°C,VCC=3.3V if nothing else stated.

 

Parameter

Type

Condition/Note

Operating supply voltage

DC 1.8~3.7V

 

Central frequency

433MHz

Can be programmable to other frequency in bands 410~525MHz

Frequency accuracy

±10KHz

 

Modulation format

FSK/OOK/LORA

Programmable

Transmit power

-2~+20dBm

Programmable

TX current consumption

<140mA

Po=20dBm

Receiver sensitivity

-110dBm

@LoRa,SF=12,BW=7.8kHz

RX current consumption

<14mA

 

Sleep State current consumption

<1uA

Refer to IC operation states

Data rate

0.018kbps~300kbps

Programmable

Spurious emissions and harmonics

< -30dBm

TX power +20dBm.

Communication distance

>3000m

0.8kBaud data rata, +20dBm output power.

Antenna impedance

50ohm

 

Operating temperature

-20~+85 °C

 

Storage temperature range

-50~+125°C

 

Dimension

20.5×15.5×2.0mm

See more in PCB description

Note:

1. The module transmission data rate will affect Transmission distance ,the higher the data rate , the closer the distance, and the lower the receiving sensitivity.

2. The supply voltage to the module will affect TX power, in the operating supply voltage range, the lower the voltage, the lower the TX power.

3. The module central frequency will change as the operating temperature change, use it under suggest temperature, the module can work well.

4. The antenna will strongly affect the communication distance, please select matched antenna and connect it correctly.

5. The module mount will affect the communication distance.

Features

 

 

Related Product
Applications

 

 

 

Pin name

Pin type

Description

VCC

Power(Analog)

1.8 V - 3.7 V analog power supply connection.

GND

Ground

Connect to the system ground.

RST

Digital Input

Reset, active low

MOSI

Digital Input

Serial configuration interface, data input.

SCK

Digital Input

Serial configuration interface, clock input.

MISO

Digital Output

Serial configuration interface, data output.

Optional general output pin when CSN is high.

NSS

Digital Input

Serial configuration interface, chip select, active low.

DIOx

Input/output

GPIO

ANT

RF I/O

RF output signal from PA, connect to the Antenna.

 

 

 

 

 

Company Information

 

Packaging & Shipping

 

FAQ

Description

Reason and Solution

Can’t communication

1.The power supply connect not well, check the module VCC whether it is out of maximum rating.

2.The signal line connect not well, check the module SPI interface.

3.The settings of the transmitter module and receiver module are not the same. Check these modules’ register configuration.

4.Signal block. If the transmitter work with a high TX power, and the receiver was put at a short distance(<0.5m), maybe there is a signal block to make no communication.

Communication distance is too short

1.The application environment is too bad or the antenna is shield. Put the antenna to a better place outside or higher throw a coaxial line , replace it with a higher gain antenna.

2.The work space contains a same frequency interference source, or a strong magnetic field interference, power source disturbance. Try to change the carrier frequency or get far away from the source of the disturbance.

3.The power supply is not strong. Check the voltage and the current whether it is enough.

High data error

1.The power supply ripple is too big, Change the power supply.

2.Check the module register configuration, it is recommended to set as the CC1120-datasheet.

3.There is a carrier frequency interference, change the channel.

4.The antenna unmatched to the module RF interface, change another matched antenna.

 

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