ESP8266 Community Forum

- Wed May 16, 2018 5:23 am #75950 Yes, theres several solutions to make a 433 transciever, but the rfx brings a bit more to the table. It is also supported with plugins in controllers, so i'd like to make it work.

I'll look a bit more in to this, but I might end up with going for a Pi with Ser2Net..

- Sat Jun 16, 2018 2:14 am #76464



Blynk + OTA 433 Mhz RF HUB TX RX with Relay Control
Tested Working

Needed Items:
Esp8266 regulated 3.3v
433mhz TX
433Mhz RX
Power
Relay (optional)

Blynk App


Connections :

Power Everything Vcc to Vcc Gnd to Gnd.
Tx Data Pin to 4 and Rx Data Pin to 5 on ESP8266
Relay to pin 13


Software:

//######################################################
//######################################################
//Blynk Setup: All Virtual Pins

//Required Widgets in Blynk:

//RTC Widget in blynk for getting time from blynk servers

//V0(OUTPUT Text)=Send Tx Send Custom Tx Command

//V1(OUTPUT Button)= 1:motor on 0:motor off My Custom Command TX (500 to on 400 to off)


//V3(OUTPUT Button)= 1:Relay on 0:Relay Off Relay On Off

//V4(INPUT TextBox)=Rx Input Shows Last Rx Value


//V8(INPUT Table)=Table of 2 Cols (Date Time, Value) Shows Incoming Rx Values With Time Date

//####################################################################################
//some included .h files could be removed

#include <Time.h>
#include <RCSwitch.h>
#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>
#include <BlynkSimpleEsp8266.h>
#include <TimeLib.h>
#include <WidgetRTC.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <FS.h>
#include <ArduinoOTA.h>

//Define Relay (Used For Some Switch Relay )
#define relay 13

#define HOSTNAME "RF-HUB-WITH-RELAY" //Define Your OTA Name

RCSwitch mySwitch = RCSwitch();
RCSwitch mySwitch1 = RCSwitch();

//Blynk Channel Auth
char auth[] = "<FILL HERE>";

const char* ssid = "<SSID HERE>";
const char* password = "<PASSWORD HERE>";

int rowIndex = 0;
int state = 0;

unsigned long timer1 = 0;
unsigned long timer2 = 0;
unsigned long timer3 = 0;

WidgetRTC rtc;




void setup()
{
Serial.begin(9600);

pinMode(relay, OUTPUT);
digitalWrite(relay, LOW);
delay(20);

//Connect Wifi
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);

Serial.println("Connecting to wifi");
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}

Serial.println("Connected. Open Blynk App");

//Start OTA
String hostname(HOSTNAME);
WiFi.hostname(hostname);
ArduinoOTA.setHostname((const char *)hostname.c_str());
ArduinoOTA.begin();

//Pin 5 for RX Data
//Pin 4 for Tx data

//Set RX TX
mySwitch.enableReceive(5);
mySwitch1.enableTransmit(4);

//Start Blynk
Blynk.begin(auth, "", "");
// mySwitch.setPulseLength(320);
// mySwitch.setProtocol(2);
mySwitch.setRepeatTransmit(5);

//RTC
setSyncInterval(10 * 60);



timer3 = millis();
timer2 = millis();
timer1 = millis();
}


void loop()
{
Blynk.run();
ArduinoOTA.handle();
yield();


//####################################################################

if (mySwitch.available()) {

int value = mySwitch.getReceivedValue();

if (value > 0) {

String currentTime = String(hour()) + ":" + minute() + ":" + second();
String currentDate = String(day()) + " " + month() + " " + year();

// adding 1 row to table every second
Blynk.virtualWrite(V8, "add", rowIndex, currentTime + " " + currentDate, value);

//highlighting latest added row in table
Blynk.virtualWrite(V8, "pick", rowIndex);


Blynk.virtualWrite(V4,value );

rowIndex++;

}
mySwitch.resetAvailable();
}



//####################################################################

//1 sec timer
if (((millis() - timer1) / 100) > 10) {


//#################################
//Relay off after 25 seconds
if (digitalRead(relay) == HIGH) {
if (((millis() - timer3) / 1000) > 25) {
digitalWrite(relay, LOW);
delay(100);
Blynk.virtualWrite(V3, 0);
}
}
//################################


timer1 = millis();
}


//####################################################################

//1 min timer
if (((millis() - timer2) / 100) > 10) {

//If Wifi Disconnected, Retry
if (WiFi.status() != WL_CONNECTED)
{
setup();
}

timer2 = millis();
}
}



BLYNK_CONNECTED() {
// Synchronize time on connection
rtc.begin();
}


//####################################################


//send tx of value
BLYNK_WRITE(V0)
{
int v = param.asInt();
mySwitch1.send(v, 24);
delay(100);
}

// motor on off
BLYNK_WRITE(V1)
{
int v = param.asInt();
//Serial.println("virtual button event");
if (v == 1) {
for(int i=0;i<10;i++){
mySwitch1.send(500, 24);
delay(100);
}
//Serial.println("virtual button on");
} else {
for(int i=0;i<10;i++){
mySwitch1.send(400, 24);
delay(100);
}
//Serial.println("virtual button off");
}
}


//Relay ON / OFF Set
BLYNK_WRITE(V3)
{
int v = param.asInt();
if (v == 1) {
timer3 = millis();
digitalWrite(relay, HIGH);
delay(100);
Blynk.virtualWrite(V3, 1);
} else {
digitalWrite(relay, LOW);
delay(100);
Blynk.virtualWrite(V3, 0);
}
}

- Mon Jun 18, 2018 12:30 am #76499 Nice, Ajaybnl!

I'd also like to mention that the RFX can be rebuilt(Attachment) to use RS232 Serial instead, with loss of factory warranty. This would work fine with the ESP's using an RS232 to TTL unit.

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