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  1. R

    A stepper motor, I2C bus and a Raspberry Pi

    The so called "I2C splitter" seems like it was made on site here at our university, im not sure the schematics is publicly available anywhere. Nevertheless, it barely has any components on it, 3 resistors, 2 diodes and a button. We only have the schematics for the TMC222 chip unfortunately...
  2. R

    A stepper motor, I2C bus and a Raspberry Pi

    UPDATE: Because monday came around we went to the professor and asked to get a new Raspberry Pi to use for tests. Even though he said that "in all my years of assisting students with this project, i have never once seen a hardware failure. Just test all components, it is surely something else"...
  3. R

    A stepper motor, I2C bus and a Raspberry Pi

    Update with the "partnumber": Here is a closeup picture of the so called "step down DC to DC converter" (the little red device in the bottom): There are no datasheet for this, and all the partnumbers we can see are the ones visible on this picture here. We just got it from our professor, and...
  4. R

    A stepper motor, I2C bus and a Raspberry Pi

    We are already aware that the I/O error originates from an attempt to send data through the I2C bus, which fails. The same code has worked before. We will try the tests you mentioned and report back here. A different test we tried was to take our Raspberry Pi and put it on another teams robot...
  5. R

    A stepper motor, I2C bus and a Raspberry Pi

    Our task is to make a robot that can move through a maze, and i am specifically in charge of the wheels and their code. The machine should be able to drive on its own, but we are ofcourse sending single commands to it from a terminal until we make it work. All 4 of us are IT students and...
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