#include <SoftwareSerial.h>
SoftwareSerial mySerial(12, 13); // RX, TX
#include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include "WiFiManager.h" //https://github.com/tzapu/WiFiManager
#include <WiFiClientSecure.h>
int count=0,i,m,j,k;
#define S0 D3
#define S1 D4
#define S2 D5
#define S3 D6
#define sensorOut D7
//Output from the sensor:
int redFrequency = 0;
int greenFrequency = 0;
int blueFrequency = 0;
//Formatted color values:
int redColor = 0;
int greenColor = 0;
int blueColor = 0;
//Values used for calibration
int redMin;
int redMax;
int greenMin;
int greenMax;
int blueMin;
int blueMax;
int color = 0;
String color1,color2;
//////////////////////////////////////// ALL DECLARATIONS for CLOUD //////////////////////////////
const char* host = "api.thingsai.io"; // OR host = devapi2.thethingscloud.com
const char* post_url = "/devices/deviceData"; // OR /api/v2/thingscloud2/_table/data_ac
const char* time_server = "baas.thethingscloud.com"; //this is to convert timestamp
const int httpPort = 80;
const int httpsPort = 443;
const char* server = "api.thingsai.io"; // Server URL
char timestamp[10];
WiFiClient client;
/////////////////////////////////////////////////////////////////////////////////////////////////////////
void configModeCallback (WiFiManager *myWiFiManager)
{
Serial.println("Entered config mode"); //*-*-*-*-*-*-*-*-*-*-*-*-*-*if control enters this function then net is not connected
Serial.println(WiFi.softAPIP()); // "WiFi.softAPIP() is for AP" , "WiFi.localIP() is for STA",
Serial.println(myWiFiManager->getConfigPortalSSID()); //if you used auto generated SSID, print it
}
/////////////////////////////////////// TIMESTAMP CALCULATION function///////////////////////////////////////
int GiveMeTimestamp()
{
unsigned long timeout = millis();
while (client.available() == 0)
{
if (millis() - timeout > 50000)
{
client.stop();
return 0;
}
}
while (client.available())
{
String line = client.readStringUntil('\r'); //indexOf() is a funtion to search for smthng , it returns -1 if not found
int pos = line.indexOf("\"timestamp\""); //search for "\"timestamp\"" from beginning of response got and copy all data after that , it'll be your timestamp
if (pos >= 0)
{
int j = 0;
for(j=0;j<10;j++)
{
timestamp[j] = line[pos + 12 + j];
}
}
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
void setup()
{
Serial.begin(115200); //(19200,SERIAL_8E1) - data size = 8 bits , parity = Even , stop bit = 1bit
mySerial.begin(115200);
WiFiManager wifiManager;
wifiManager.setAPCallback(configModeCallback);
if(!wifiManager.autoConnect("123456789","dhrumil16999")) //wifiManager.autoConnect("AP-NAME", "AP-PASSWORD"); (OR) wifiManager.autoConnect("AP-NAME"); only ID no password (OR) wifiManager.autoConnect(); this will generate a ID by itself
{
Serial.println("failed to connect and hit timeout"); //control comes here after long time of creating Access point "NodeMCU" by NodeMCU and still it has not connected
//reset and try again, or maybe put it to deep sleep
ESP.reset();
delay(1000);
}
//if you come here you have connected to the WiFi
Serial.println("connected...");
//Declarations:
pinMode(S0, OUTPUT);
pinMode(S1, OUTPUT);
pinMode(S2, OUTPUT);
pinMode(S3, OUTPUT);
pinMode(13, OUTPUT);
pinMode(sensorOut, INPUT);
// Set frequency scaling to 20%:
digitalWrite(S0, HIGH);
digitalWrite(S1, LOW);
calibrate();//calibrate sensor (look at serial monitor)
}
void loop()
{
/////////////////////////////////////// SEND THE QUERY AND RECEIVE THE RESPONSE///////////////////////
readColor();//read sensor
decideColor();//format color values
printColor();//print values
Serial.print("connecting to ");
Serial.println(host); //defined upside :- host = devapi2.thethingscloud.com or 139.59.26.117
///////////////////////////////////// TIMESTAMP CODE SNIPPET /////////////////////////
Serial.println("inside get timestamp\n");
if (!client.connect(time_server, httpPort))
{
return; //*-*-*-*-*-*-*-*-*-*
}
client.println("GET /api/timestamp HTTP/1.1"); //Whats this part doing, i didnt get
client.println("Host: baas.thethingscloud.com");
client.println("Cache-Control: no-cache");
client.println("Postman-Token: ea3c18c6-09ba-d049-ccf3-369a22a284b8");
client.println();
GiveMeTimestamp(); //it'll call the function which will get the timestamp response from the server
Serial.println("timestamp receieved");
Serial.println(timestamp);
///////////////////////////////////////////////////////////////////////////////
Serial.println("inside ThingsCloudPost");
String PostValue = "{\"device_id\": 61121695919, \"slave_id\": 1";
PostValue = PostValue + ",\"dts\":" +timestamp;
PostValue = PostValue +",\"data\":{\"Color\":" + color2 +"}"+"}";
Serial.println(PostValue);
/* create an instance of WiFiClientSecure */
WiFiClientSecure client;
Serial.println("Connect to server via port 443");
if (!client.connect(server, 443)){
Serial.println("Connection failed!");
} else {
Serial.println("Connected to server!");
/* create HTTP request */
client.println("POST /devices/deviceData HTTP/1.1");
client.println("Host: api.thingsai.io");
//client.println("Connection: close");
client.println("Content-Type: application/json");
client.println("cache-control: no-cache");
client.println("Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.IjVhMzBkZDFkN2QwYjNhNGQzODkwYzQ4OSI.kaY6OMj5cYlWNqC2PNTkXs9PKy6_m9tdW5AG7ajfVlY");
client.print("Content-Length: ");
client.println(PostValue.length());
client.println();
client.println(PostValue);
//////////////////////////////////POSTING the data on to the cloud is done and now get the response form cloud server//////////////////
Serial.print("Waiting for response ");
while (!client.available()){
delay(50); //
Serial.print(".");
}
/* if data is available then receive and print to Terminal */
while (client.available()) {
char c = client.read();
Serial.write(c);
}
/* if the server disconnected, stop the client */
if (!client.connected()) {
Serial.println();
Serial.println("Server disconnected");
client.stop();
}
}
Serial.println("////////////////////// THE END /////////////////////");
delay(3000);
}
void decideColor() {//format color values
//Limit possible values:
redColor = constrain(redColor, 0, 255);
greenColor = constrain(greenColor, 0, 255);
blueColor = constrain(blueColor, 0, 255);
//find brightest color:
int maxVal = max(redColor, blueColor);
maxVal = max(maxVal, greenColor);
//map new values
redColor = map(redColor, 0, maxVal, 0, 255);
greenColor = map(greenColor, 0, maxVal, 0, 255);
blueColor = map(blueColor, 0, maxVal, 0, 255);
redColor = constrain(redColor, 0, 255);
greenColor = constrain(greenColor, 0, 255);
blueColor = constrain(blueColor, 0, 255);
//decide which color is present (you may need to change some values here):
if (redColor > 250 && greenColor > 250 && blueColor > 250) {
color = 1;//white
color1 = "White";
color2 = '"'+color1+'"';
}
else if (redColor < 25 && greenColor < 25 && blueColor < 25) {
color = 2;//black
color1 = "Black";
color2 = '"'+color1+'"';
}
else if (redColor > 200 && greenColor > 200 && blueColor < 100) {
color = 4;//yellow
color1 = "Yellow";
color2 = '"'+color1+'"';
}
else if (redColor > 200 && greenColor > 25 /*&& blueColor < 100*/) {
color = 3;//orange
color1 = "Orange";
color2 = '"'+color1+'"';
}
else if (redColor > 200 && greenColor < 100 && blueColor > 200) {
color = 5;//purple
color1 = "Purple";
color2 = '"'+color1+'"';
}
else if (redColor > 250 && greenColor < 200 && blueColor < 200) {
color = 6;//red
color1 = "Red";
color2 = '"'+color1+'"';
}
else if (redColor < 200 && greenColor > 250 && blueColor < 200) {
color = 7;//green
color1 = "Green";
color2 = '"'+color1+'"';
}
else if (redColor < 200 /*&& greenColor < 200*/ && blueColor > 250) {
color = 8;//blue
color1 = "Blue";
color2 = '"'+color1+'"';
}
else {
color = 0;//unknown
color1 = "Unknown";
color2 = '"'+color1+'"';
}
}
void calibrate() {
Serial.println("Calibrating...");
Serial.println("White");//aim sensor at something white
//set calibration vaues:
digitalWrite(13, HIGH);
delay(2000);
digitalWrite(S2, LOW);
digitalWrite(S3, LOW);
redMin = pulseIn(sensorOut, LOW);
delay(100);
digitalWrite(S2, HIGH);
digitalWrite(S3, HIGH);
greenMin = pulseIn(sensorOut, LOW);
delay(100);
digitalWrite(S2, LOW);
digitalWrite(S3, HIGH);
blueMin = pulseIn(sensorOut, LOW);
delay(100);
Serial.println("next...");//aim sensor at something black
digitalWrite(13, LOW);
delay(2000);
Serial.println("Black");
//set calibration values:
digitalWrite(13, HIGH);
delay(2000);
digitalWrite(S2, LOW);
digitalWrite(S3, LOW);
redMax = pulseIn(sensorOut, LOW);
delay(100);
digitalWrite(S2, HIGH);
digitalWrite(S3, HIGH);
greenMax = pulseIn(sensorOut, LOW);
delay(100);
digitalWrite(S2, LOW);
digitalWrite(S3, HIGH);
blueMax = pulseIn(sensorOut, LOW);
delay(100);
Serial.println("Done calibrating.");
digitalWrite(13, LOW);
}
void printColor() {//print data
Serial.print("R = ");
Serial.print(redColor);
Serial.print(" G = ");
Serial.print(greenColor);
Serial.print(" B = ");
Serial.print(blueColor);
Serial.print(" Color: ");
switch (color) {
case 1: Serial.println("WHITE"); break;
case 2: Serial.println("BLACK"); break;
case 3: Serial.println("ORANGE"); break;
case 4: Serial.println("YELLOW"); break;
case 5: Serial.println("PURPLE"); break;
case 6: Serial.println("RED"); break;
case 7: Serial.println("GREEN"); break;
case 8: Serial.println("BLUE"); break;
default: Serial.println("unknown"); break;
}
}
void readColor() {//get data from sensor
//red:
digitalWrite(S2, LOW);
digitalWrite(S3, LOW);
redFrequency = pulseIn(sensorOut, LOW);
redColor = map(redFrequency, redMin, redMax, 255, 0);
delay(100);
//green:
digitalWrite(S2, HIGH);
digitalWrite(S3, HIGH);
greenFrequency = pulseIn(sensorOut, LOW);
greenColor = map(greenFrequency, greenMin, greenMax, 255, 0);
delay(100);
//blue:
digitalWrite(S2, LOW);
digitalWrite(S3, HIGH);
blueFrequency = pulseIn(sensorOut, LOW);
blueColor = map(blueFrequency, blueMin, blueMax, 255, 0);
delay(100);
}
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