FDC2114: FDC2114 Interfacing with Arduino

Patt Vira

Part Number: FDC2114
Other Parts Discussed in Thread: FDC1004, FDC2214

I am having some issues getting raw data from the FDC2114 while connecting it to an Arduino through I2C.

I have connected the SDA, SCL, GND, and 3.3V pins to same pins on the Arduino. I have given the I2C address as 0x2A and register address as 0x00 for the DATA_CH0.

Not sure if I did something wrong with the wiring or the code. Does anyone have example Arduino codes I can take a look? Thank you very much.

over 8 years ago

0 Marisol Pantoja Otero over 8 years ago

Prodigy 70 points

I am starting to look into FDC1004 connected with arduino and I found this very helpful project

http://e2e.ti.com/support/sensor/capacitive-sensing/f/987/t/571173

0 Patt Vira over 8 years ago in reply to Marisol Pantoja Otero

Prodigy 50 points

Marisol - thank you for your response! However, the link to the 'project' links back to this page.

0 Rachel Liao over 8 years ago in reply to Patt Vira

TI__Expert 6480 points

Hi Patt, Marisol,

Please see the following thread for arduino code: e2e.ti.com/.../495744

Thanks,
Rachel

0 Marisol Pantoja Otero over 8 years ago in reply to Patt Vira

Prodigy 70 points

Hi, here is the link again, I hope it work this time create.arduino.cc/.../non-contact-capacitive-liquid-level-sensing-using-fdc1004-9333c7

0 Marisol Pantoja Otero over 8 years ago in reply to Patt Vira

Prodigy 70 points

Hello Patt, here is the link again, I am sorry I pasted the wrong one create.arduino.cc/.../non-contact-capacitive-liquid-level-sensing-using-fdc1004-9333c7

0 Patt Vira over 8 years ago in reply to Marisol Pantoja Otero

Prodigy 50 points

Thank you so much!

0 Patt Vira over 8 years ago in reply to Rachel Liao

Prodigy 50 points

Thank you Rachel!

0 Marisol Pantoja Otero over 8 years ago in reply to Rachel Liao

Prodigy 70 points

Hi Rachel, I need to sense in a range from 1pf up to 15pf, I looked the FDC2114 datasheet and it only shows the maximum capacitance (250nf) but it does not indicate the minimum capacitance able to read. Thats why I was looking into FDC1004 instead. Does FDC2214 works well for that high-accurate aproach?

0 Rachel Liao over 8 years ago in reply to Marisol Pantoja Otero

TI__Expert 6480 points

Hi Marisol,

Yes, it can depending on your system noise and dynamic range.

Thanks,
Rachel

0 Marisol Pantoja Otero over 8 years ago in reply to Rachel Liao

Prodigy 70 points

Hi Rachel, thanks for your reply,

I want to measure moisture content of grains. Currently, I am using a parallel plate capacitor, but I am thinking about to change it for a parallel fingers electrode (similar to the electodes used in the level water sensing system) to be able to sense remotely (without cables connecting the sensig box, but the electrodes very close to the target). I want to avoid the human interference as much as posible, because people is going to be holding the meter with their hands. The range is between 1pF and 10pF, and I don't know how to caracterize the system noise. So that, which chip would be better for this specific aplication? FDC1004 or FDC2114?

Marisol

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FDC2114: FDC2114 Interfacing with Arduino