However before you make calls again

However before you make calls against the I2C bus you first need to take control, or ‘lock’, it to ensure your code has exclusive access to I2C. There are a few ways to lock the bus like waiting on the busio.I2C.try_lock() function and then calling the busio.I2C.unlock() function when finished (typically in a Python try-finally block). Locking the bus tells CircuitPython that your code needs to use I2C and that any other code using I2C should wait for your code to finish. This helps different bits of code use the same hardware peripherals by ensuring they don’t try to use it at the same time or interrupt each other.