Long range wireless transmitter 2km

Image: 

Description: 

This pair of wireless modules operates in the 433mHz Frequency band, and the range can be up to 2 km. It is very simple to use, and can be a very cost effective solution for your long range wireless project. A slight latency of about 0.5 second may be expected. It's ideal for not-real-time-critical applications such as sending instructions to relays, cameras and other sensors and actuators. Please note that the pair only does one way communication. For applications where both way communication is needed, two pairs may be used.


Schematic:

Link to wiring Schematic

Note:
  • Wire the TX strictly as mentioned in diagram above. The data pins should only be connected to Vcc or left floating.
  • Please straighten  the antenna before usage, or the module will be burned!

Specification:
  • Working volt : 5V
  • Working current: ≤2.5mA(5.0VDC)
  • Technology: Superhet (VCO, PLL)
  • Modulation:OOK/ASK
  • Working band:  433.92MHz 
  • Bandwidth:  1.5MHz 
  • Sensitivity:  -105dBm (50Ω) 
  • Rate: <5Kbps
  • Decoding form:PT2272
  • Antenna length:  18cm
  • Emission Distance: 2 KM
Coupling the TX to RX module

Example wiring

D0-->pin4;
D1-->pin5;
D2-->pin6;
D3-->pin7;
GND-->GND;
VDD-->5v.

The data pins of the receiver will follow the logic level of the transmitter.

Example Code
void setup() {
    pinMode(4, OUTPUT);
    pinMode(5, OUTPUT);
    pinMode(6, OUTPUT);
    pinMode(7, OUTPUT);
    Serial.begin(9600);
}
void loop() {
    unsigned char i = 0;
    for (i = 0; i < 16; i++) {
        send_data(i);
        Serial.print("i=");
        Serial.println(i, DEC);
        delay(500);
        send_data(0);
        delay(500);
    }
}
//====================================
void send_data(unsigned char data) {
    digitalWrite(4, (data & 0x01));
    digitalWrite(5, (data & 0x02));
    digitalWrite(6, (data & 0x04));
    digitalWrite(7, (data & 0x08));
}

keywords: fm transmitter, transmitter fm, transmitter

Catalog: 

Price: $69.00
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