Gas_sensor_reeedit:70: error: 'MQCalibration' was not declared in this scope
Ro = MQCalibration(MQ_PIN); //Calibrating the sensor. Please make sure the sensor is in clean air
^
C:\Users\User\Documents\Arduino\Gas_sensor_reeedit\Gas_sensor_reeedit.ino: In function 'void loop()':
Gas_sensor_reeedit:87: error: 'MQRead' was not declared in this scope
iPPM_LPG = MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_LPG);
^
Gas_sensor_reeedit:87: error: 'MQGetGasPercentage' was not declared in this scope
iPPM_LPG = MQGetGasPercentage(MQRead(MQ_PIN)/Ro,GAS_LPG);
^
C:\Users\User\Documents\Arduino\Gas_sensor_reeedit\Gas_sensor_reeedit.ino: In function 'long int MQGetGasPercentage(float, int)':
Gas_sensor_reeedit:190: error: 'MQGetPercentage' was not declared in this scope
return MQGetPercentage(rs_ro_ratio,LPGCurve);
^
exit status 1
'MQCalibration' was not declared in this scope
These is the error code