ET Sensor

Hi Harrison,

Analog ports have two modes, "floating" and "pullup". The default is pullup, which is what light sensors and top hats use. The ET requires floating mode to have good resolution. There's a function in the Link libraries to disable pullup mode. I'm on a computer without KISS-IDE installed, so I can't check the exact name of the function, but I think it's something like "set_analog_pullups". Look in the manual for a function with a similar name; it should solve your problem.

Good luck!

PS: Sorry for the delayed reply, I was away for the weekend and didn't notice your post until now.

Thank you for the info! That definitely clears it up! I will try as soon as I can to incorporate this info into my example program. Once finished (or not), I will reply back to this thread to inform if it works or if I have any further questions.

Thanks again!
~Harrison

Yes! I think I got it! Just like you said, I added the function set_analog_pullup to the beginning of the program. When I ran it, it displays at most 150 (about 1 1/2 inches from a surface) and at least 2 or 3 (really far away or touching the surface).

Thank you for all of the help!
~Harrison

P.S. Here's the code:

// Created on Fri October 18 2013
/* NOTES:
	This program is meant to display the ET Sensor's reading.
	Currently, this program is working, however the reading is staying realtively the same.
 
	UPDATE:
	added set_analog_pullup(0,0) to change the analog reading default to "floating"
        NOW the program is working fine.
*/
int main()
{
	set_analog_pullup(0,0); //chnges the analog to "floating" because ET sensor requires better resolution
	while (b_button() != 1) { //while the b_button is not pressed,
	display_clear(); //clear the display
	printf("Reading is: %d\n", analog(0)); //and display the ET Sensor's reading
	msleep(100); //delay the update by 0.1 seconds
	}
}

Awesome, happy to help.

I'm not confused about a lot of things, but, this time, I am confused about why you used analog instead of analog10? I mean, Jeremy didn't comment on it so I must have missed something. I know that analog10 has 1024 bytes but, doesn't the ET display with 1024 bytes. And, one of the professors at USC told me to use analog10. Please reply. Thanks.

analog10 is higher resolution than analog (10-bit vs 8-bit), but the extra 2 bits don't usually matter. There's no harm in using analog10, and it's what I recommend, but some people use analog without any trouble.

Oh, ok, thanks, I'm glad I wasn't wrong. Thanks for clearing my confusion. Relieved that I'm not missing out, lol.

I'm new and I'm interested in this topic. Thank you!
192.168.o.1

Recently I have come across this site and little bit confused about the subject you have described here. Actually I don’t have any idea regarding this et-sensor. Here I have only seen some comments regarding the topic. If you share more details, it would be better for people like us.amsterdam tours

It is the first time I am hearing of this sensor. What is this sensor all about? How is it used in the industry? It will be good if you share some details of the sensor so that all are aware of it. printer problems in windows