Basically, it can be divided into two cases
Reading/sampling TX pin of the sensor (since usually nothing is sended back)
Send/Read possibility - in case of range switching/calibrating/programming
How easy/or how difficult is to have additional UART. I guess the only one is dedicated on the Bluetooth connection, and on first glance I don't see any UART connections. May be another serial standard as I2C will be OK, but there is sensors which really has only UART.
