I2C addresses > 127 are invalid

[timcharper]

I2C addresses are 7bits; the 8th bit is reserved for the protocol to indicate whether a read or a write is intended. If one accidentally writes an invalid address, then it "bricks" the device as a sensor, and one must use an avr programmer to manipulate eeprom manually or erase the contents and reprogram.

https://www.totalphase.com/support/articles/200349176-7-bit-8-bit-and-10-bit-I2C-Slave-Addressing

https://learn.adafruit.com/i2c-addresses/overview

[timcharper]

I think several of the first couple of addresses are reserved, also. On page 17 of https://www.nxp.com/docs/en/user-guide/UM10204.pdf they're detailed. So address must be in the range [8..123]