Plastic box (I used a box used for convenient foods)
Ready to spend your next week for the whole process
The cost of parts is about $25. After soldering this is how my weather station look like:
I attempted incoporating two TMP36 Temperature Sensors but the reading was off a few degrees. Maintaining a precise 3.3V is the key.
I did not know I2C multiplexer - I2C expander when starting the circuit. That limits the number of Si7021 or HTU21 Humidity and Temperature sensors. They are using x40 (60) I2C address and no reconfiguration available.