I'm working on a project where I need to collect data from a load cell using the serial monitor. I can collect this data fine, the problem is that it comes with some random letters before and lbs after. I want to change this data from a char value to an int so I can just collect the numerical data and use that. The problem is I cannot find a way to print the data other than using the char variable type. Can anyone help? I will list the section of code that I use to collect this below.
Please post an example sketch that illustrates the problem, using code tags when you do
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Thanks for the help. Here is an example of my code along with a picture of the serial data I receive. The data itself is all good, but I want to be able to extract just the numbers.
#include <LiquidCrystal_I2C.h> // Including LCD
#include <SoftwareSerial.h>
SoftwareSerial THRUST(10, -1); // Setting up analog communications for loadcell
LiquidCrystal_I2C lcd(0x27, 16, 2); // Set up LCD display.
void setup() {
Serial.begin(9600); // Begin serial communication.
THRUST.begin(9600); // Begin load cell communication.
lcd.begin(); // Begin LCD display.
lcd.backlight();
}
void loop() {
while (THRUST.available()) {
Serial.print(char(THRUST.read())); // Live prints thrust values in serial monitor.
}
lcd.print("THRUST");
lcd.print(THRUST); // Doesn't work currently but want to recieve interger to put here.
}
I changed Serial.available to THRUST.available and it worked for me! Thank you so much, I was messing around with the parseInt function for hours with no luck. Do you know how I can take this data now and print it on an LCD? I tried like this but it doesn't let me use the 'data' term to display it.
#include <LiquidCrystal_I2C.h> // Including LCD
#include <SoftwareSerial.h>
SoftwareSerial THRUST(10, -1); // Setting up analog communications for loadcell
LiquidCrystal_I2C lcd(0x27, 16, 2); // Set up LCD display.
void setup() {
Serial.begin(9600); // Begin serial communication.
THRUST.begin(9600); // Begin load cell communication.
lcd.begin(); // Begin LCD display.
lcd.backlight();
}
void loop() {
if (THRUST.available())
{
int data = THRUST.parseInt();
Serial.println(data);
}
lcd.clear();
lcd.print("THRUST");
lcd.print(data);
}
That worked perfectly for me. Thank you so much again for your help. I'm very new to using Arduino and have been searching for a solution for hours so I appreciate it a lot.
Not particularly with the 'parseInt' function. I tried something similar before with the 'while' function instead and had no luck. I also believe I understand the scope of the variables too as the 'data' variable before was only defined within the 'if' function before which is why I couldn't use it outside, correct? Everything else is very clear to me now I think.
#include <LiquidCrystal_I2C.h> // Including LCD
#include <SoftwareSerial.h>
SoftwareSerial THRUST(10, -1); // Setting up analog communications for loadcell
LiquidCrystal_I2C lcd(0x27, 16, 2); // Set up LCD display.
void setup() {
Serial.begin(115200); // Begin serial communication.
THRUST.begin(9600); // Begin load cell communication.
lcd.begin(); // Begin LCD display.
lcd.backlight();
}
void loop() {
if (THRUST.available())
{
int data = THRUST.parseInt();
while (THRUST.available() > 0)THRUST.read();
if (data == 0)return;
Serial.println(data);
lcd.clear();
lcd.print("THRUST ");
lcd.print(data);
}
}
Yes. In reply #6 I made it a local variable in the loop() function. It could have been made a global variable to make it available anywhere or its value could have been passed to a function to make it available to that function. In fact that is what is happening then you do Serial.println(data);
