I am new to arduino and shield modules and I was wondering if you could help me with this issue. I recently bought Arduino Uno and MMA8452 shield module(https://www.fasttech.com/products/1012002) and after some extensive search it seems I cannot find how to proprely connect this shield module and arduino board.
My question is has anyone had any experience with this shield module and connecting it to Arduino. I have found the library and datasheet but the datasheet does not point out proper pins as marked on the shield itself so I am not sure on how to connect it.
Connect the module's Vcc to the Arduino's 5V pin, SDA to Arduino's SDA (or A4 in the UNO case), SCL to Arduino's SCL (or A5 in the UNO case) and GND to GND on the Arduino. SA0 goes to GND too (if you don't have an address clash, which cannot be if this is the only device). The rest isn't needed. The module has already pull-ups installed so you don't need bus pull-ups anymore. The INTx pins are optional, just if you need them and then it's application dependent where to connect them.
A tip for your next buy: never buy anything from a supplier that don't provide documentation for the material!
Thanks a lot for your reply. I have connected the wires in this fashion and got this libraryhttp://n0m1.com/2012/02/12/shake-rattle-roll-the-mma8453q-arduino/ and it works great. Altough I have connected 3.3V pin from sensor to 3.3V pin on Arduino and have not connected Vcc.
And thanks for the tip... it seems I had to learn it the hard way
If you used the 3V3 pin only, the pull-ups on the board are not active and you might have to install external pull-ups (I'm not sure if the ATmega328 internal pull-ups are enough for this setup, depends a lot on the capacity of the level converter on the board).
Does "and it works great" mean that your problem is solved?
Well, I am recieving x, y, z data from the sensor and have them printed out on serial monitor. I was reading on some sites that it seems I need 330 ohm resistors between SCL and SDA if I connect it to 5V supply. I am not sure what does that mean because as I said I am still a newb. Altough my INT1 and INT2 pins do not seem to work with current setup because I used some other examples for shake and motion and they didn't seem to work.
