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import matplotlib as mpl
import matplotlib.pyplot as plt
from datetime import datetime
from http.server import HTTPServer, BaseHTTPRequestHandler
import board
import busio
import digitalio
import adafruit_bme280
class WeatherHTTPRequestHandler(BaseHTTPRequestHandler):
def __init__(self, *args):
BaseHTTPRequestHandler.__init__(self, *args)
def do_GET(self):
if self.path == "/":
response = b'<img src="/plot.png">'
self.send_response(200)
self.end_headers()
self.wfile.write(response)
elif self.path == "/plot.png":
self.create_fig()
with open("/home/pi/plot.png", "rb") as f:
data = f.read()
self.send_response(200)
self.end_headers()
self.wfile.write(data)
def create_fig(self):
with open("/home/pi/log.csv") as f:
date = []
temp = []
humid = []
press = []
for line in f.readlines():
parts = line.split(",")
date.append(datetime.strptime(parts[0], "%Y-%m-%d %H:%M:%S.%f"))
temp.append(float(parts[1]))
humid.append(float(parts[2]))
press.append(float(parts[3]))
ax1 = plt.subplot(311)
ax1.plot_date(date, temp, 'r-')
ax1.xaxis.set_major_locator(mpl.dates.DayLocator())
ax1.xaxis.set_minor_locator(mpl.dates.HourLocator(range(0, 25, 6)))
ax1.xaxis.set_major_formatter(mpl.dates.DateFormatter("%Y-%m-%d"))
ax1.fmt_xdata = mpl.dates.DateFormatter("%Y-%m-%d")
ax1.set_ylabel("temperature")
ax2 = plt.subplot(312)
ax2.plot_date(date, humid, 'b-')
ax2.xaxis.set_major_locator(mpl.dates.DayLocator())
ax2.xaxis.set_minor_locator(mpl.dates.HourLocator(range(0, 25, 6)))
ax2.xaxis.set_major_formatter(mpl.dates.DateFormatter("%Y-%m-%d"))
ax2.fmt_xdata = mpl.dates.DateFormatter("%Y-%m-%d")
ax2.set_ylabel("humidity")
ax3 = plt.subplot(313)
ax3.plot_date(date, press, 'g-')
ax3.xaxis.set_major_locator(mpl.dates.DayLocator())
ax3.xaxis.set_minor_locator(mpl.dates.HourLocator(range(0, 25, 6)))
ax3.xaxis.set_major_formatter(mpl.dates.DateFormatter("%Y-%m-%d"))
ax3.fmt_xdata = mpl.dates.DateFormatter("%Y-%m-%d")
ax3.set_ylabel("pressure")
#fig.autofmt_xdate()
plt.setp(ax2, xticklabels=[])
plt.setp(ax3, xticklabels=[])
fig = plt.gcf()
fig.set_size_inches(12,8)
plt.savefig("/home/pi/plot.png")
if __name__ == "__main__":
i2c = busio.I2C(board.SCL, board.SDA)
bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
print("Starting http server")
http = HTTPServer(("", 80), WeatherHTTPRequestHandler)
print("serving forever")
http.serve_forever()
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