#include <WiFi.h> #include <WiFiClient.h> #include <BlynkSimpleEsp32.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 20, 4); #include "HX711.h" #define DOUT 23 #define CLK 19 #define BUZZER 25 HX711 scale(DOUT, CLK); #define BLYNK_PRINT Serial char auth[] = "*******"; char ssid[] = "*******"; char pass[] = "********"; int liter; int val; float weight; float calibration_factor = 102500; // change this value for your Load cell sensor void setup() { // Set up serial monitor Serial.begin(115200); lcd.init(); lcd.backlight(); pinMode(BUZZER ,OUTPUT); Serial.println("Remove all weight from scale"); scale.set_scale(); scale.tare(); //Reset the scale to 0 long zero_factor = scale.read_average(); //Get a baseline reading Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects. Serial.println(zero_factor); Blynk.begin(auth, ssid, pass); } void loop() { Blynk.run(); measureweight(); } void measureweight(){ scale.set_scale(calibration_factor); //Adjust to this calibration factor weight = scale.get_units(5); if(weight<0) { weight=0.00; } liter = weight*1000; val = liter; val = map(val, 0, 505, 0, 100); lcd.clear(); lcd.setCursor(1, 0); lcd.print("IOT Based IV Bag"); lcd.setCursor(2, 1); lcd.print("Monitering System"); Serial.print("Kilogram: "); Serial.print(weight); Serial.println(" Kg"); lcd.setCursor(1, 2); lcd.print("IV Bottle = "); lcd.print(liter); lcd.print(" mL"); Serial.print("IV BOTTLE: "); Serial.print(liter); Serial.println("mL"); lcd.setCursor(1, 3); lcd.print("IV Bag Percent="); lcd.print(val); lcd.print("%"); Serial.print("IV Bag Percent: "); Serial.print(val); Serial.println("%"); Serial.println(); delay(500); if (val <= 50 && val >= 40){ Blynk.logEvent("iv_alert","IV Bottle is 50%"); digitalWrite(BUZZER, HIGH); delay(50); digitalWrite(BUZZER, LOW); delay(50); } else if (val <= 20){ Blynk.logEvent("iv_alert","IV Bottle is too LOW"); digitalWrite(BUZZER, HIGH); } else{ digitalWrite(BUZZER, LOW); } Blynk.virtualWrite(V0,liter); Blynk.virtualWrite(V1,val); }
Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!
OneCompiler's C online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.
#include <stdio.h>
int main()
{
char name[50];
printf("Enter name:");
scanf("%s", name);
printf("Hello %s \n" , name );
return 0;
}
C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.
When ever you want to perform a set of operations based on a condition if-else
is used.
if(conditional-expression) {
// code
} else {
// code
}
You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to if-else-if ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type array-name[size];
data-type array-name[size][size];
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
Two types of functions are present in C
Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,
User defined functions are the ones which are written by the programmer based on the requirement.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
//code
}