raspi_logger.py

#coding: utf-8

import time
import datetime
import os
path = "./log/"

import bme280

# import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

if __name__ == '__main__':

    # Raspberry Pi pin configuration:
    RST = None     # on the PiOLED this pin isnt used

    # Note you can change the I2C address by passing an i2c_address parameter like:
    disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, i2c_address=0x3C)

    # Initialize library.
    disp.begin()

    # Clear display.
    disp.clear()
    disp.display()


    # Create blank image for drawing.
    # Make sure to create image with mode '1' for 1-bit color.
    width = disp.width
    height = disp.height
    image = Image.new('1', (width, height))

    # Get drawing object to draw on image.
    draw = ImageDraw.Draw(image)

    # Draw a black filled box to clear the image.
    draw.rectangle((0,0,width,height), outline=0, fill=0)

    # Draw some shapes.
    # First define some constants to allow easy resizing of shapes.
    padding = -2
    top = padding
    bottom = height-padding
    # Move left to right keeping track of the current x position for drawing shapes.
    x = 5

    # Load default font.
    font = ImageFont.load_default()

    while True:
        # clear display
        draw.rectangle((0,0,width,height), outline=0, fill=0)
        sensor_data = bme280.readData()
        temp = "%6.2f" % (sensor_data[0])
        draw.text((x, top), "Temp =" + temp + " °C", font = font, fill = 255)
        press = "%7.2f" % (sensor_data[1])
        draw.text((x, top + 8), "Press = " + press + " hPa", font = font, fill = 255)
        hum = "%6.2f" % (sensor_data[2])
        draw.text((x, top + 16), "Hum =" + hum + " %", font = font, fill = 255)
        disp.image(image)
        disp.display()

        # ファイル書き込み処理
        date = str(datetime.date.today())
        nowtime = datetime.datetime.now()
        # ファイルがあったら上書きする
        if(os.path.exists(path + date +".csv")):
            f = open(path + date +".csv", 'a')
            f.write(str(nowtime.hour) + ':' + str(nowtime.minute) + ':' + str(nowtime.second) + ',')
            f.write(temp + ',' + press + ',' + hum + ' \n')
            f.close()
        # なかったら生成する
        else:
            f = open(path + date +".csv", 'w')
            f.write("date,Temp,Press,Hum\n")
            f.write(str(nowtime.hour) + ':' + str(nowtime.minute) + ':' + str(nowtime.second) + ',')
            f.write(temp + ',' + press + ',' + hum + ' \n')
            f.close()
        time.sleep(10)