ADS1115: Single ended input

if(mux == 0x60) //AIN2 for gas flow rate sensor

{

uint8_t zero_output = 1; //Sensor zero output voltage

uint8_t fs_output = 5; //Sensor full scale output voltage

uint16_t sensor_fs = 1000; //Sensor full scale measurement range (sccm)

float pga = 6.144; //PGA gain setting

float sccm = 0;

//Convert adc_result to voltage equivalent

float adc_voltage;

adc_voltage = (adc_result*pga)/((1<<16)/2);

//Convert uint16_t adc_results to uint8_t sd_data[] array

sd_data[29] = (adc_result>>8) & 0xFF; //MSB

sd_data[30] = adc_result & 0xFF; //LSB

//Calculate flow rate

sccm = (((float)(adc_voltage - zero_output) / (fs_output - zero_output))*sensor_fs);

plot_data[11] = sccm;

return sccm;

}