SEN0256 Temperature probe not reading correctly
Toby.Cotter 2023-02-01 15:24:13 1429 Views11 Replies I have a SEN0256 probe connected to a 5v Arduino Uno. When I point the probe at my forehead, I am reading a temperature of 62.0 C. I should be getting a reading of 37C. I copied the conversion formula straight from the DFRobot wiki page. Any idea on why I am reading the wrong value?
void setup() {
Serial.begin(115200);
}
void loop() {
unsigned int ADC_Value = analogRead(A5);
float i=((double)ADC_Value*450/614.4-70);
Serial.print(i);
Serial.println();
delay(500);
}
Thanks for the information.Keep sharinglike this.
coreball
Chase.Peck Hope it can help!
coreball
According to the datasheet, I have connected the power supply to the respective pins ( Red – 24VDC , Black -GND , Yellow – Output , Sheield – GND ). After powering on, I am receiving a sensor output of 0. 8V DC.
Based on the sensor specifications, if I calculate the temperature with respect to the output voltage, it indicates 70 degrees Celsius.
However, the actual room temperature is only around 20 to 23 degrees Celsius.
kindly request your assistance in resolving this issue.
silambarasan.Bala Changing from 450 to 340 solved the issue. Thank you for your help!!!
Toby.Cotter I have my Arduino powered by 9v. I have the temp sensor connected to A3 and the code also uses A3. I am still reading my body temperature as 62.0 C. I am thinking the formula below is incorrect or my probe is malfunctioning. Any ideas?
unsigned int ADC_Value = analogRead(A3);
float i=((double)ADC_Value*450/614.4-70);
From the code above:
ADC_Value = 180
i = 61.84
Thank you for your help
Toby.Cotter I think, some corrections must be done in the wiki: https://wiki.dfrobot.com/TS01_IR_Thermal_Sensor_(0-3V)_SKU_SEN0256
The diagram shows that the yellow wire of the sensor is connected to A5. But the code reads the analog value from the pin A3.
unsigned int ADC_Value = analogRead(A3);
bidrohini.bidrohini Attached is a photo of my setup. The Arduino is powered by USB, but the USB is a powered hub so I think it should be ok. I have also tried with a 2nd Arduino board and got the same issue.
Thanks
Toby.Cotter 