@Akaplan. I have looked into adding support for that pressure sensor in the past. It appeared that there was a non-standard delay needed between sending two of the I2C commands and it was not possible to implement given the generic nature of I2C support in Firmata. I have this sensor so I’ll look into it again sometime in the next 2 or 3 weeks (I’m extremely busy right now… just finished moving across the country and am starting a new job tomorrow).