for Arduino I could use address $20 or 0 to access, the latter if I used one of the libraries.
in Australia I drive on the other side of the road, its horses for courses
pbp uses 8bit address scheme



Address bits are connected to ground
so A0=0 A1=0 A2=0
plugged into formula
pbp i2c address = (% 0 1 0 0 A2 A1 A0 )<<1
addr =(%0100000)<<1 = $40

so
I2CWRITE SDA,SCL,$40,[$05,%10111000] is whats required