Despite the recycled case, the circuit is very simple to create. I have used a ESP8266-12E (just using the pin GPIO02 to drive the green status led, the pins GPIO05 and GPIO04 to I2c [SDA and SCL] or wire communication to the sensor).
I built two firmware. One sends data using MQTT to a NODE-RED to visualize the graphic of the data acquired.
The second implements a webserver, so I can visualize data directly connecting to ESP. The first solution will be updated by using OTA; the second one will be reprogram with FTDI programmer.