Wawa:
Never used those sensors, but yes.
Some sensors can be set to different addresses by connecting a chip select pin to VCC or ground.A Wemos D1 mini is one of many all-in-one ESP8266 based boards.
Nothing else needed (well, maybe a micro USB lead).
It's ESP8266 WiFi chip can be programmed directly with the Arduino IDE.
One drawback could be fewer I/O pins, but you only need two for I2C.An Uno + bare ESP8266 module (ESP-01) is clumsy, and much more difficult to connect and program.
Beware that you can't blindly connect 3.3volt devices to 5volt devices.
Leo..
I looked at the demos and I like it. I think I'll be getting one. I'm getting the ESP8266 by saturday, so I can try and program how the communication with pure data can go. You are right, I only need two for I2C, and one thing I liked about the wemos is that the SA0 inputs are labeled in the board.
I am aware of the connection between 3.3V devices to 5V, but thank you for the reminder, I appreciate it.