OS error :Failed to write byte

Support
1

Hey,
I am running in to this error almost every time i use the pan-tilt hat and the servo’s doesnt even move.
Anyone know any solutions to this?

Traceback (most recent call last):
File “/home/pi/track/facetracker.py”, line 37, in
pan(cam_pan-90)
File “/usr/lib/python3/dist-packages/pantilthat/pantilt.py”, line 466, in servo_one
self.setup()
File “/usr/lib/python3/dist-packages/pantilthat/pantilt.py”, line 80, in setup
self._set_config()
File “/usr/lib/python3/dist-packages/pantilthat/pantilt.py”, line 118, in _set_config
self._i2c_write_byte(self.REG_CONFIG, config)
File “/usr/lib/python3/dist-packages/pantilthat/pantilt.py”, line 209, in _i2c_write_byte
raise IOError(“Failed to write byte”)
OSError: Failed to write byte

2

You aren’t Sreehar, are you?

It sounds like you’re getting intermittent failure of the I2C bus. Is this a program you’ve written yourself? If so, do any of the default examples work? If not, how have you connected the pan-tilt to the Pi?

3

Yes same person.
I did not write the code.
Default examples shows same error.
like this

Pan-Tilt-HAT-intro
Pan-Tilt-HAT-intro780×584 71.6 KB

4

That doesn’t look like Pimoroni’s Pan Tilt Hat?
And if it isn’t, that’s why their code doesn’t work on it.

5

Yeah, that looks like a Waveshare Pan Tilt (although it also looks like a product shot, so maybe they just grabbed the first vaguely similar thing off google to illustrate?)