How do I get an actual pressure data from each of these pressure insole?

[shalmity]

Hey guys, this is a photo of a pressure insole that I bought from amazon.

I'm trying to use this with esp32 dev kit and get the actual pressure data from all of 45 sensors.

The question is, how do I have to connect all the 16 pins to esp32?

and how do I have to program this to actually get the pressure data from each sensors?

I tried to get data one by one, but as I searched, each pin from column has like 4~10 sensors, so I have no idea how to distinguish each sensors from the pin.

Thanks

[markd833]

Welcome. Have a read of the sticky post at the top of this area of the forums. It will help you get the best out of the forums.

In order to help you, we need more information from you.

Can you provide the datasheet (or a link to it) for these sensors.
How have you connected these sensors to your ESP32?
Please provide the code you are currently using.

I'm sure that you will get further assistance one more detail is available.

[shalmity]

Thank you for replying
Below is the code that I wanted to implement:

const int rowPin = 14;
const int colPin = 32; 

void setup() {
  Serial.begin(115200);
  pinMode(rowPin, OUTPUT);
  digitalWrite(rowPin, LOW);
}

void loop() {
  digitalWrite(rowPin, HIGH);

  delay(5);

  int fsrValue = analogRead(colPin);
  Serial.print("FSR 압력 값: ");
  Serial.println(fsrValue);

  delay(200);
}

I used this code to get data from just one of the sensors, so later I can build more to get data from all of those 45 sensors.

This is the picture that I connected right now through film cable connector to esp32.

And for the data sheet I got this pdf file that I will attach from the seller, I'll attach the screen shots of the pdf, but I'm afraid this is the only information I can get.

[shalmity]

• according to the picture, I connected the Y1 row and X3 coloumn

[jim-p]

I don't see the 2K resistor ((R0) in your image.
You need to connect it according to the schematic.

Please post the entire pdf data sheet, not images.

[shalmity]

Thank you for your reply
I didn't have the 2k resistor yet those that cause enormous problems?
and this is pretty much the entire pdf, I don't have permission to upload files cause I'm new to this website

[jim-p]

You need to connect a 2K resistor (R0) to the sensor (Rs) as shown in the schematic.
Vout connects to one of the ESP32 analog inputs.

[jim-p]

You will need to adjust the 2K resistor value to get the best response. So for experimenting I would buy a 2K potentiometer and an assortment of resistors ranging from 100 ohms to 10K ohms

[shalmity]

Thank you for your precise response, I'll definitely try the way you advised

[jim-p]

I'm only telling you to do what the datasheet says to do.

[markd833]

@shalmity in section 3 of the images you provided, it shows how each of the outputs is supposed to be connected. Section 3 also says to use a fixed resistor of around 2K as @jim-p has already advised you.

The left hand graph in section 2 shows the relationship between R (I assume to be Rs) and the force in grams. If you know the value of Vcc and you know the value of Ro (2K) then you can work out the value of Rs from the value of Vout. From that you can work the force applied using the graph.