My code to access weight scale sensor using amplifir hx711 require using hx711.h library. When I include it in my code I see this errors:
proj0:25: error: empty character constant
toSend='';
^proj0:10: error: 'hx711' does not name a type
hx711 scale(out,clk);
^proj0:11: error: 'hx711' does not name a type
hx711 scale1(A2,A3);
^C:\Users\ramadan\Desktop\proj0\proj0.ino: In function 'int readsensor(char)':
proj0:37: error: 'scale' was not declared in this scope
case '1':scale.set_gain(64);
^exit status 1
empty character constant
#include <hx711.h>
#include <SoftwareSerial.h>
#define out A0
#define clk A1
int bluetoothTx =3;
int bluetoothRx =4;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
hx711 scale(out,clk);
hx711 scale1(A2,A3);
void setup() {
// setupBlueToothConnection(); //Used to initialise the Bluetooth shield
pinMode(bluetoothTx, INPUT);
pinMode(bluetoothRx, OUTPUT);
//setupBlueToothConnect
bluetooth.begin(38400);
}
void loop() {
//Read from bluetooth and write to usb serial
if(bluetooth.available()) {
char toSend = (char)bluetooth.read();
long x=readsensor(toSend);
toSend='';
if(x>0){
bluetooth.print(x);
}
}
delay(500);
}
int readsensor(char s){
long y=0;
switch(s){
case '1':scale.set_gain(64);
y=scale.read();
break;
case '2':scale.set_gain(32);
y=scale.read();
break;
case '3':scale.set_gain(64);
y=scale.read();
break;
case '4':scale.set_gain(32);
y=scale.read();
break;
default:break;
}
return y;
}
/* void setupBlueToothConnection()
{
blueToothSerial.begin(9600);// BluetoothBee BaudRate to default baud rate 38400
//blueToothSerial.print("\r\n+STWMOD=0\r\n"); //set the bluetooth work in slave mode
blueToothSerial.print("\r\n+STNA=HC-05\r\n"); //set the bluetooth name as "SeeedBTSlave"
blueToothSerial.print("\r\n+STOAUT=1\r\n"); // Permit Paired device to connect me
blueToothSerial.print("\r\n+STAUTO=0\r\n"); // Auto-connection should be forbidden here
delay(2000); // This delay is required.
blueToothSerial.print("\r\n+INQ=1\r\n"); //make the slave bluetooth inquirable
//Serial.println("The slave bluetooth is inquirable!");
delay(2000); // This delay is required.
blueToothSerial.flush();
}*/
