How to use the Temperature Sensor Brick

Products & Technology Grove
#1

Hi, I’m looking for some help with the Electronic Brick Kit Temperature sensor.

The Docs do not give any clue as to how to connect the module or provide an example sketch.

I have only just received the kit and was going through the examples to make sure everything worked - Everything does, except I can’t test the Temp. Sensor.

Sorry to be a pain - But just a pointer in the right direction would be appreciated.

Thanks.

#2

Hi Geezer,

The following is an example of arduino with temperature sensor.

You can refer to this link. arduino.cc/cgi-bin/yabb2/YaB … 1257341359

[code]

const int tempPin = A0; // Analog input pin that the potentiometer is attached to

int Temp = 0; // value output of analog

void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
}

void loop() {
// read the analog in value:
Temp= analogRead(tempPin) * 45 / 1024;
// print the results to the serial monitor:
Serial.print("temperature = " );
Serial.println(Temp);
// wait 100 milliseconds before the next loop
// for the analog-to-digital converter to settle
// after the last reading:
delay(100);
}[/code]
LCD.jpg

#3

OK SQX, many thanks - That works … Sort of…
I’m getting a temperature reading, but it’s nothing like accurate - I wasn’t expecting 3 decimal places and would have been happy with +/- 1 or 2 degrees C. But i’ve placed the sensor (carefully) in ice and I get a reading of 11 degrees :astonished: - just a bit high!
However, at room temperature, it seems to be OK (ish). Looks to me like there is a bit of non-linearity going on here. I also don’t understand the 45/1024 bit of the code - I assume that is some “fiddle factor”. :confused:

This has been a good learning experience, but I think I’ll be looking towards the LM35, as there seems to be better reports on this device.

Thanks again SQX, much appreciated.

Ken.

#4

Hi,

I'm getting a temperature reading, but it's nothing like accurate - I wasn't expecting 3 decimal places and would have been happy with +/- 1 or 2 degrees C. But i've placed the sensor (carefully) in ice and I get a reading of 11 degrees   - just a bit high!

You’d better refer to the datasheet, the type of the sensor is TTC3A103□39H.
seeedstudio.com/depot/images … /TTC03.pdf

However, at room temperature, it seems to be OK (ish). Looks to me like there is a bit of non-linearity going on here. I also don't understand the 45/1024 bit of the code - I assume that is some "fiddle factor"

You can refer to this link which there is the calculation.
arduino.cc/cgi-bin/yabb2/YaB … 1257341359

Merry Christmas!

#5

OK, I think I understand - I will do some more experimenting.

Many thanks for your help.

All the best - Ken