Need quick help with Memsic 2125.

Using Arduino Sensors
1

I am following this guide here http://www.instructables.com/id/Arduino-Micro-Electronic-Bubble-Level/

For some reason the two 2125s I bought dont seem to do anything. They lock the X and Y values at 345 and 355 respectively.

When I follow this guide here Arduino Project Hub

The serial monitor has values locked at 4000 on both axis.

I have no idea whats going on. Can someone help me troubleshoot?

2

Start by posting an example of the code that you are testing, perhaps from the second page you link to, and a circuit diagram of your setup.

3

const int xP = 11;
const int yP = 12;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);

pinMode(xP, INPUT);
pinMode(yP, INPUT);

}

void loop() {
// put your main code here, to run repeatedly:
int px, py;
int ax, ay;

px = pulseIn(xP, HIGH);
py = pulseIn(yP, HIGH);

ax = ((px / 10) - 500) * 8;
ay = ((py / 10) - 500) * 8;

Serial.print(ax);
Serial.print("\t");
Serial.print(ay);
Serial.println();

delay(100);

}

The code is as above and the circuit diagram is exactly this

1906×1327 179 KB

4 
const int xP = 11;
const int yP = 12;

  pinMode(xP, INPUT);
  pinMode(yP, INPUT);

  px = pulseIn(xP, HIGH);
  py = pulseIn(yP, HIGH);

The code appears to use pins 11 and 12 but the circuit doesn't

Am I missing something obvious ?

5

UKHeliBob:

const int xP = 11;

const int yP = 12;

pinMode(xP, INPUT);
  pinMode(yP, INPUT);

px = pulseIn(xP, HIGH);
  py = pulseIn(yP, HIGH);



The code appears to use pins 11 and 12 but the circuit doesn't

Am I missing something obvious ?

I changed that part of the code to correct pins and its still locked to 4000 :confused:

6

Obviously you need to check the wiring, connections and breadboard carefully. What readings do you get if you disconnect the 2125 output lines from the circuit ?

7