chipKIT Wi-FIRE with I/O shield

[bobby]

Hi there,

I am using the chipKIT Wi-FIRE with the basic I/O shield and MPLABX IDE. I want to read out the temperature sensor of the I/O shield via I2C and write the value to the OLED display. I do see a value on the OLED-display that reacts on the sensors environment (i.e. it increases when I put my finger on the sensor), however it is clearly wrong as I get 360°C for room temperature (before anyone asks: I know I have to multiply the sensor value with 2^-4 to get a the correct numerical value). To initialize the bus and read out the sensor value I followed an example found on https://sites.google.com/site/johnkneenconnectedlab/i2c, but it goes much beyond what I actually want to accomplish and modifying that code just leads to the result mentioned above.

So here is my question: is there some starter code to simply read out the temperature sensor in this setup?

 

[Alex]

I do know Imagination provides free course materials which teach users how to use Wi-Fire and Basic IO shield. They need people to register to get the materials https://community.imgtec.com/downloads/connected-microcontroller-lab-v1.5/

[jpeyron]

Hi @bobby,

We do not have any code for the basic I/O shield with MPLABX but we do for MPIDE here. I would suggest to look through the IOshieldTemp library for reference.

cheers,

Jon

[Larry Standage]

If you can get the demo code up and compiling on Arduino, there is now a sketch importer plugin that will allow you to run/debug it in MPLAB X.

[bobby]

Thanks a lot for your answers!

The thing is that I really want to use MPLAB X as this is the environment used in Imagination Technologies University Programm - just because it was mentioned: there are no examples in there on how to use the I2C-bus.

Thanks anyway - I will just keep on trying!