weatherstation (recent first)

4. Home Weather Station (v1.0) with double sensors, more data QA/QC:

• Measure three environmental parameters: light intensity, temperature and humidity
• Each parameter is measured by at least two sensors
• Data is dislayed with standard deviation

1. Using Multiplex (MUX) to collect multiple analog inputs through one analog pin on ESP8266

• CD4051 MUX IC acts as a very fast potentiometer that it seqentially reads the analog value of sensors

2. Example using 4 temperature sensors (18B20) with an Arduino Nano

• The 18B20 is a simple devide using one-wire bus that is similar to I2C method. Each devides has one unique address so we can daisy-chain as many sensors as wish. To ouput, in this case the temperature, can be distinguish from others by specifying the address of the target DS18B20.
• This example was setup to demonstate using a Raspberry Pi to collect and log the Print out information making the Raspberry Pi a simple logger. The full tutorial is posted on Instructables.com

3. A complete setup of weather station with:

• a WEMOS ESP8266 using deepsleep mode (with 5 minute interval)
• collect light, temperature and humidity, posts data to the MQTT broker
• sparse out data using Paho-MQTT-Python, store in sqlite database, and display data in a web-based platform
• a detailed writeup on Instructables.com

Schematics:

Screenshot

5. To be added.