Interfacing Ultrasonic Module (MB1242) with Arduino or RPi using I2C protocol

2 views (last 30 days)
I am trying to interface an ultrasonic module (MB1242) using I2C with Arduino or Raspberry Pi on Simulink. There are two examples (both for Arduino and RPi) on Matlab/Simulink to interface with TM102 temperature sensor using I2C. I bought a TMP102 temperature sensor which communicates with Simulink using I2C and it works perfectly. I have been working on Ardunio mostly because I am more comfortable with it than RPi but eventually I would want this to work on RPi. The Arduino code I have used to test the ultrasonic sensor is as follows;
#include "Wire.h"
void setup()
{
Serial.begin(9600);
Wire.begin();
}
void loop()
{
Wire.beginTransmission(0x70); // Slave address
Wire.write(0x51);
Wire.endTransmission();
delay(100);
Wire.requestFrom(0x70, byte(2));
if (Wire.available() >=2)
{
byte HighByte = Wire.read();
byte LowByte = Wire.read();
word range = word(HighByte, LowByte);
Serial.println(range);
}
}
The main issue I am facing is reading ultrasonic (MB1242) values continuously on Matlab/Simulink. I can only read the last value or as it's written on the datasheet "If the sensor receives a range request after power-up without taking a range reading (i.e. receiving the “Take Range Reading” command), the sensor will respond with two bytes containing information used for in-factory manufacturing purposes".
After getting TMP102 working on Matlab I have modified the code to read the ultrasonic sensor. I can successfully read the value but as soon as I put it in a for loop, Matlab throws an error.
The Matlab code is as follows;
for i = i:50
pause(0.5);
writeRegister(mb1242, 1, hex2dec('51'), 'uint8'); //mb1242 is an object already created with slave address 0x70 (see attached)
data = read(mb1242, 2, 'uint8');
bitconcat(fi(data(1),0,8,0), fi(data(2), 0, 8, 0))
end
The error;
Error occurred while reading data from the I2C device. Check the connections between the hardware and device, clear the device object and create a new one.
Although no error appears in Simulink, as soon as I enter slave value it freezes or gives wrong value. Please see attached.
Any help will be much appreciated.
Thanks you

Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!