Raspberry Pi Weather Station

The code here will generally be a modification of the Raspberry Pi Foundation Weather Station Code, I am not using the official Raspberry Pi Weather Station hardware, so I will be modifying it to suit my own hardware

Depends

• gpiozero

  sudo pip3 install gpiozero

• RPi.GPIO

  sudo pip3 install RPi.GPIO

• thingspeak

  sudo pip3 install thingspeak

wind_direction.py

First up is the wind vane, this uses a Maplin wind vane, more specifically, this one.

This is an analogue sensor and thus needs an Analogue to digital convertor or ADC. The ADC I am using is an MCP3008, and to make it easy I am using the Rasp.io anglogzero board by Alex Eames

This code has been updated to use the MCP3008 with gpiozero

wind_direction.json

This file acts as a look up to convert the analogue sensor reading into either a compass direction, i.e. NE, NNE, SW, etc. or a bearing, i.e. 45 degrees, 22.5 degrees, or 225 degrees. When creating the wind_direction object in the wind_direction.py file, this json file is read into memory, additional information is added, which depend upon the vin and vdivider variable.

For the MCP3008 on the analogzero board vin should be set to 3.3v. vdivider should be set to match the value of the voltage divider resister you are using. In my case this is a 9.82kOhms or 9820 ohms.

config.py

Add your thingspeak channel ID and read/write API keys in here

interrupt_client.py

This is a direct copy of the Raspberry Pi Foundations' code, with a minor edit to get it working with Python3, the reset() method has been edited, if you are still using Python2 then remove the 'b' from before "RESET"

interrupt_daemon.py

This is a direct copy of the Raspberry Pi Foundations' code - but with the calibration corrected for the wind speed

Wind Speed Gauge

Ground one wire Other one into GPIO21

Pins can be changed in the setup() function.

Starting

For the sensors to work this must be called (and runs in the background using the following command:

python3 interrupt_daemon.py start

If you want to restart it, the command is:

python3 interrupt_daemon.py restart

If you want to stop the daemon running use:

python3 interrupt_daemon.py stop

##log_all_sensors.py

This is based on the Raspberry Pi Foundations' code but has been heavily modified, all references to the Oracle database have been removed and I have added in the code to upload the data to thingspeak.