beshaya / fdc1004 Goto Github PK

i use
M1 = int(fdc.getCapacitance(0));
style measurement of capacitor but i have a problem.

i measure about 1500 fF but sometimes sensor reads 50-60 fF

what cause this ?

HI beshaya,

This code is very useful to start with FDC1004 as there is very little documentation available on net for FDC1004. The issue i am now facing is my device always return FFFF FFFF as a raw data. could you Please help me out in detecting where it is going wrong. I am using it with arduino Pro mini atmega328.
I have tried different chips of FDC1004. result is still same.

Thanks in advance.
Akshay Ghadage

Hi how can i measure more than 100pf capacitance ? thanks

I tried several tims and I am unable to communicate with the FDC104EVm. I noticed even after removing the chip, the Arduino is still showing "0 pf". Can someone suggest an urgent solution? I am stuck with my project.

In the function "FDC1004::read16()", there is a Wire.beginTransmission() before the Wire.requestFrom() and a Wire.endTransmission() after a Wire.requestFrom(). Those can be removed.
Explanation: Common-mistakes, number 2 and 3.

after loading FDC1004 code, it is showing error and -2,147,483,648. can you help?

FEMTOFARADS_CAPDAC is set to 3028. I think there is two problems with that:

First, I guess you got that value by reading the data sheet: the max value of the capdac is 96.875. 5 bits = 32 steps so 1 bit is 96.875 / 32 = 3.02734375. Multiply by 1000 and you have 3027, not 3028. Right? Or is there a reason why you round up?

But I think you miss that the max value of CAPDAC is 31, not 32. The data sheet says Coffset = CAPDAC * 3.125. And it adds up: the max value of CAPDAC is 11111b = 31 so the max offset is 31 * 3.125 = 96.875.

So if I'm not mistaken FEMTOFARADS_CAPDAC should be 3125.

Hello All,

I am new to Arduino (2 days old!). I started using the protocentral FDC1004EVM breakout trying to execute
https://www.hackster.io/team-protocentral/non-contact-capacitive-liquid-level-sensing-using-fdc1004-9333c7
and using codes

https://github.com/Protocentral/ProtoCentral_fdc1004_breakout

I am stuck with the the serial monitor showing 0.00pF always and shows no readings even if i bring my hand close to the chip.
I require urgent help. Kindly give in your valuable suggestions.

1. read capacitance values
2. read mullti-channel simultaneously. (2 sensor at least)
3. able to plot or acquire data in real-time

Hi,

I am using your library, which works really well! Thanks for that.

However, I just spent half a day of debugging to find out that a missing "return 0" at the end of FDC1004::triggerSingleMeasurement can lead to the function returning something non-zero, and then the code stops working.

Maybe nice to fix that :)

Thank you,
René