weather_server.py

# Author: Alasdair Allan <alasdair@babilim.co.uk>
# SPDX-License-Identifier: MIT

# Simple RESTful web server for the Pimoroni WeatherHAT + Sensor Kit
# https://shop.pimoroni.com/products/weather-hat?variant=39672186765395

# WeatherHAT Python Library
# https://github.com/pimoroni/weatherhat-python

# Calling GET endpoints, e.g.
# 
# http://weather.local:5000/api/1.0/temperature/external 

# Calling a POST endpoint from command line:
#
# wget -O- --post-data='{"temperature":"-10.0","units":"C"}' --header='Content-Type:application/json' \
#      'http://weather.local:5000/api/1.0/temperature/offset'

import json
import weatherhat

from flask import Flask, request
from datetime import datetime

sensor = weatherhat.WeatherHAT()
app = Flask(__name__)

@app.route('/api/1.0/raw')
def data():
    sensor.update(interval=30.0)
    wind_direction_cardinal = sensor.degrees_to_cardinal(sensor.wind_direction)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')
    data = {
        'time': f"{current_date}",
        'system_temp': f"{sensor.device_temperature:0.2f}",
        'external_temp': f"{sensor.temperature:0.2f}",
        'offset_temp' : f"{sensor.temperature_offset:0.2f}",
        'humidity': f"{sensor.humidity:0.2f}",
        'dew_point': f"{sensor.dewpoint:0.2f}",
        'light': f"{sensor.lux:0.2f}",
        'pressure': f"{sensor.pressure:0.2f}",
        'wind_speed': f"{sensor.wind_speed:0.2f}",
        'rain': f"{sensor.rain:0.2f}",
        'wind_direction': f"{sensor.wind_direction:0.2f}",
        'wind_cardinal': f"{wind_direction_cardinal}"
    }
    return data

@app.route('/api/1.0/temperature')
def temp():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}",
             'external': f"{sensor.temperature:0.2f}", 
             'system': f"{sensor.device_temperature:0.2f}",
             'dewpoint': f"{sensor.dewpoint:0.2f}",
             'offset' : f"{sensor.temperature_offset:0.2f}",
             'units': 'C'}
    return data

@app.route('/api/1.0/temperature/external')
def ext_temp():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')  
    data = { 'time': f"{current_date}", 'temperature': f"{sensor.temperature:0.2f}", 'units': 'C'}
    return data
    
@app.route('/api/1.0/temperature/system')
def dev_temp():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'temperature': f"{sensor.device_temperature:0.2f}", 'units': 'C'}
    return data    

@app.route('/api/1.0/temperature/dewpoint')
def dewpoint():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'temperature': f"{sensor.dewpoint:0.2f}", 'units': 'C'}
    return data  
    
@app.route('/api/1.0/temperature/offset', methods= ['GET','POST'] )
def offset():
    if request.method == 'GET':
        current_date = datetime.now().isoformat(sep='T',timespec='auto')    
        data = { 'time': f"{current_date}", 'temperature': f"{sensor.temperature_offset:0.2f}", 'units': 'C'}
        return data
        
    if request.method == 'POST':        
        offset = float(request.json['temperature'])
        sensor.temperature_offset = offset
        
        current_date = datetime.now().isoformat(sep='T',timespec='auto')    
        data = { 'time': f"{current_date}", 'temperature': f"{sensor.temperature_offset:0.2f}", 'units': 'C'}
        return data
        
@app.route('/api/1.0/humidity')
def humidity():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'humidity': f"{sensor.humidity:0.2f}", 'units': '%'}
    return data

@app.route('/api/1.0/light')
def light():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'light': f"{sensor.lux:0.2f}", 'units': 'lux'}
    return data  

@app.route('/api/1.0/pressure')
def press():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'pressure': f"{sensor.pressure:0.2f}", 'units': 'hPa'}
    return data  

@app.route('/api/1.0/rain')
def rain():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'rain': f"{sensor.rain:0.2f}", 'units': 'mm/sec'}
    return data  

@app.route('/api/1.0/wind')
def wind():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    wind_direction_cardinal = sensor.degrees_to_cardinal(sensor.wind_direction)
    data = { 'time': f"{current_date}", 
             'speed':{ 
                'speed': f"{sensor.wind_speed:0.2f}", 
                'units': 'm/sec'}, 
             'direction':{ 
                 'direction': f"{sensor.wind_direction:0.2f}", 
                 'units': 'degrees', 
                 'cardinal': f"{wind_direction_cardinal}" } 
           }
    return data  

@app.route('/api/1.0/wind/speed')
def wind_speed():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'speed': f"{sensor.wind_speed:0.2f}", 'units': 'm/sec'}
    return data 

@app.route('/api/1.0/wind/direction')
def wind_direction():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    data = { 'time': f"{current_date}", 'speed': f"{sensor.wind_direction:0.2f}", 'units': 'degrees'}
    return data 

@app.route('/api/1.0/wind/cardinal')
def wind_cardinal():
    sensor.update(interval=30.0)
    current_date = datetime.now().isoformat(sep='T',timespec='auto')    
    wind_direction_cardinal = sensor.degrees_to_cardinal(sensor.wind_direction)
    data = { 'time': f"{current_date}", 'speed': f"{wind_direction_cardinal}" }
    return data 

if __name__ == '__main__':
    app.run(host='0.0.0.0')