RDIoT Demo

Walkie Talkie Module VHF 134-174Mhz 5Km (SA828) [S203]

https://www.youtube.com/watch?v=4AhNH8WA1YI

* Specs

SA828 is an all-in-one professional walkie-talkie module in small size. It is very easy to use with powerful function. This module has full function of a professional walkie-talkie and can talk with any analog walkie-talkie in the market. With the small size, it can be easily embedded into instrument, portable and handheld device. SA828 works well in the hot/cold environment with the KDS 1PPM TCXO. The features of excellent antenna match network, good RF amplifier, high RF sensitivity allow its communication easily to achieve over 3Km in open area.

Rotary switch for channel selection, EEPROM, Audio Amplifier, RF Amplifier, PTT key, Antenna socket are all included in such a small size module. Besides, all parameters (CTCSS, CDCSS, SQ, Predefined channels etc) can be easily modified either by PC software or command using UART interface. With the embedded audio volume turning circuit, user can only solder a variable resistor on Pin16, Pin17 to adjust the volume steplessly.

Features:

1ppm TCXO

Embedded EEPROM, data saved even power off 

High / low output power selection (500mW-1W)

8 SQ* 166 CDCSS, 38 CTCSS

High Integrated with ultra small size

High Sensitivity: -124dBm  

3~5Km distance in open aera

1W Output Power* 12.5/25KHz bandwidth selection

Solely TX and RX frequency

Frequency range: 134 -- 174MHz

Application: 

Audio tracking and control system 

Outdoor sport product

Instrument

Security system

Pocket / handheld device

Small size walkie-talkie

3DR Radio 915Mhz Telemetry Kit [S211]

https://www.youtube.com/watch?v=8zU309jKdtc

* Specs

3DR Telemetry Kit Specifications

Very small size

Light weight (under 4 grams without antenna)

915MHz

Receiver sensitivity to -121 dBm

Transmit power up to 20dBm (100mW)

Transparent serial link

Air data rates up to 250kbps

MAVLink protocol framing and status reporting

Frequency hopping spread spectrum (FHSS)

Adaptive time division multiplexing (TDM)

Support for LBT and AFA

Configurable duty cycle

Built in error correcting code (can correct up to 25% data bit errors)

Demonstrated range of several kilometers with a small omni antenna

Can be used with a bi-directional amplifier for even more range

Open source firmware

AT commands for radio configuration

RT commands for remote radio configuration

Adaptive flow control when used with APM

Based on HM-TRP radio modules, with Si1000 8051 micro-controller and Si4432 radio module

* Contents

- Connect

5V ----- 5V

TXD ----- RX

RXD ----- TX

CTS

RTS 

GND ----- GND

- Key Code

void setup() {

  Serial.begin(57600);

}

void loop() {

  if (Serial.available()) {

    Serial.print((char) Serial.read());

    delay(10);

  }

}

433Mhz Super-regenerative module (FS1000A,MX-JS-05V) [S081]

https://www.youtube.com/watch?v=_h1i9cnf-ic

* Specs

Emission head (2SC3357 transistor):

The actual working distance 50-100m

Operating voltage 3-12V

Operating current :10-15mA

Ways of working: AM

Transfer rate: 4KB / S

Transmit power: 10mW

External antenna: 28cm ordinary multi-core or single core line

Pinout from left ? right: (DATA, VCC, GND)

Size: 1.9CM * 1.9CM * 0.9CM

Receiver Module Technical Data:

Model: MX-05V

Working voltage: DC5V

Quiescent Current: 4MA

Receiving frequency: 433.92MHZ

Receiver sensitivity:-105DB

Size: 30 * 14 * 7mm

External antenna: 32CM single wire, wound into a spiral

* Contents

- Connect

Emission 

ATA0 ----- D4

VCC ----- 5V

GND ----- GND

Receiver

VCC ----- 5V

DATA ----- D2 (data)

X

GD ----- GND

LED ----- D2

- Data Format Define

 : 1=1, 1=2

- Key Code

FS1000A

#include <Wire.h> 

#include <VirtualWire.h>       

#include <Bounce2.h>           

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2); 

int buttonPin = 2;  

int sendPin = 4;   

boolean oneTimeFlag = false;        

Bounce bouncer = Bounce();    

void setup() {

  lcd.init();                      // initialize the lcd 

  lcd.backlight();

  lcd.print("S081-FS1000A Snd");

   pinMode(buttonPin, INPUT);

   digitalWrite(buttonPin, HIGH);

   bouncer.attach( buttonPin );

   bouncer.interval(5);

   vw_setup(2000);        

   vw_set_tx_pin(sendPin);

   Serial.begin(9600);

}

void loop() {

 if ( bouncer.update() && bouncer.read() == LOW) {     

    if( oneTimeFlag == false) {                        

      lcd.setCursor(0, 1);

      lcd.print("ON = Send(1) ");

      Serial.println("on");

      sendMessage("1=1");  

      oneTimeFlag = true;

    } else {

      lcd.setCursor(0, 1);

      lcd.print("OFF = Send(2)");

      Serial.println("off");                 

      sendMessage("1=2");    

     oneTimeFlag = false;

     }         

  }

}

void sendMessage(char *data) {

  if (strlen(data) > 0) {     

   int msgSize = (strlen(data) + 1); 

   char packetData[msgSize];         

   vw_send((uint8_t *)data, msgSize);  

   vw_wait_tx();                       

  }  

}

MX-JS-05V

#include <Wire.h> 

#include <LiquidCrystal_I2C.h>

#include <VirtualWire.h>

#include <string.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // LCD2004

byte message[VW_MAX_MESSAGE_LEN];                    

byte messageLength = VW_MAX_MESSAGE_LEN; 

int rcvPin = 2; 

int ledPin = 8; // LED

void setup()

{

  lcd.init();  // initialize the lcd 

  lcd.backlight();

  lcd.print("start LCD2004");

  delay(1000);

  lcd.clear();

  pinMode(ledPin, OUTPUT);

  digitalWrite(ledPin, HIGH);

  delay(1000);

  digitalWrite(ledPin, LOW);

  vw_setup(2000);

  vw_set_rx_pin(rcvPin);       

  vw_rx_start();               

}

void loop()

{

  lcd.setCursor(0,0);

  lcd.print("S081:MX-JS-05V Rev");

  if (vw_get_message(message, &messageLength)) {       

    int command = processResponse((char*)message, 1); 

    if (command) {

      switch (command) {

       case 1:                        

         lcd.setCursor(0,2);

         lcd.print("Receive Value= 1 ");

         digitalWrite(ledPin, HIGH);

         break;

       case 2:                         

         lcd.setCursor(0,2);

         lcd.print("Receive Value= 2 ");

         digitalWrite(ledPin, LOW);

         break;

      }

    }  

  }

}

int processResponse(char* message, int pinCode) {

  char *p = message;

  char *buf;

  int o = 0;

  int pin;

  int command;

      lcd.setCursor(0,1);

      lcd.print("RF msg:"+String(message));

  while ((buf = strtok_r(p, "=", &p)) != NULL)  {  

   if (o == 0) {                                 

     pin = atoi(buf);                            

   } else {

     command = atoi(buf);                        

   }

    o++;

  }

  if (pinCode == pin && command > 0) {                   

    return command;

  } else {

    return 0; 

  }

}

315Mhz 4Channel Remote Control Kit (PT2262/PT2272) [S054]

https://www.youtube.com/watch?v=DGVYL7ykCdI

* Specs

1.Operating voltage: DC12V (27A/12V battery x1)

2.Operating Current: 10mA @ 12V 

3.Radiated power: 10mw @ 12V

4.Modulation mode: ASK (Amplitude Modulation) 

5.Transmitting frequency: 315MHZ 

6.Transmission distance :50-100M (Open field, the receiver sensitivity of -100dbm) 

7.Encoder types: fixed code

* Contents

- Connect

VT ------ D6

D3 ----- D5

D2 ----- D4

D1 ----- D3

D0 ------ D2

5V ----- 5V

GND ----- GND

- Key Code

#include <Wire.h> 

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // LCD2004

int pinD0 = 2;

int pinD1 = 3;

int pinD2 = 4;

int pinD3 = 5;

int pinVT = 6;

void setup()

{

  lcd.init();  // initialize the lcd 

  lcd.backlight();

  lcd.print("start LCD2004");

  pinMode(pinD0,INPUT);

  pinMode(pinD1,INPUT);

  pinMode(pinD2,INPUT);

  pinMode(pinD3,INPUT);

  pinMode(pinVT,INPUT);

  delay(1000);

  lcd.clear();

}

void loop()

{

  lcd.setCursor(0,0);

  lcd.print("S054:RF 315Mhz T/R");

  int valD0 = digitalRead(pinD0);

  int valD1 = digitalRead(pinD1);

  int valD2 = digitalRead(pinD2);

  int valD3 = digitalRead(pinD3);

  int valVT = digitalRead(pinVT);

  lcd.setCursor(0,1);

  lcd.print("D0=" + (String)valD0 + "(D) D1="+ (String)valD1 + "(C)");

  lcd.setCursor(0,2);

  lcd.print("D2=" + (String)valD2 + "(B) D3="+ (String)valD3 + "(A)");

  lcd.setCursor(0,3);

  lcd.print("VT=" + (String)valVT + "  " );

}