* Hi, does somebody have experience with the MCP23017 GPIO expander? I am trying with the esp-hal and mcp230XX (with this PR to make it run with the embedded-hal 1.0.0 traits, https://github.com/quartiq/mcp230xx/pull/7). I tried a simple i2c scan loop over all adresses, which finds my device, so I think the pysical connection is ok.  I get a panic

!! A panic occured in 'src/main.rs', at line 36, column 45:
called `Result::unwrap()` on an `Err` value: AckCheckFailed

```
let mut i2c0 = I2C::new(
        peripherals.I2C0,
        io.pins.gpio5,
        io.pins.gpio4,
        100u32.kHz(),
        &clocks,
        None
    );

    let pin = Mcp23017::A7;
    
    pub const ADDR: u8 = 0x20; // default addr

    let mut u:Mcp230xx::<I2C<'_, I2C0, Blocking>, Mcp23017> = Mcp230xx::new(i2c0, ADDR).unwrap();
    u.set_direction(pin, Direction::Output).unwrap();
    u.set_gpio(pin, Level::High).unwrap();
```

```
mcp230xx = { git = "https://github.com/quartiq/mcp230xx.git", rev = "dcc66f4"}
esp-hal = { version = "0.18.0", features = [ "esp32c3" ] }
```