I missed the bit about running it before and after my code. Here is what I get then
Scanning...
I2C device found at address 0x20 !
I2C device found at address 0x21 !
I2C device found at address 0x22 !
I2C device found at address 0x23 !
I2C device found at address 0x24 !
I2C device found at address 0x25 !
I2C device found at address 0x26 !
I2C device found at address 0x27 !
I2C device found at address 0x28 !
I2C device found at address 0x29 !
I2C device found at address 0x2A !
I2C device found at address 0x2B !
I2C device found at address 0x2C !
I2C device found at address 0x2D !
I2C device found at address 0x2E !
I2C device found at address 0x2F !
I2C device found at address 0x30 !
I2C device found at address 0x31 !
I2C device found at address 0x32 !
I2C device found at address 0x33 !
I2C device found at address 0x34 !
I2C device found at address 0x35 !
I2C device found at address 0x36 !
I2C device found at address 0x37 !
I2C device found at address 0x38 !
I2C device found at address 0x39 !
I2C device found at address 0x3A !
I2C device found at address 0x3B !
I2C device found at address 0x3C !
I2C device found at address 0x3D !
I2C device found at address 0x3E !
I2C device found at address 0x3F !
done
16
1023
Scanning...
No I2C devices found
Scanning...
No I2C devices found
1023
Scanning...
No I2C devices found