Created
December 2, 2015 03:07
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Temperture logger for Raspberry Pi, uses BMP180 sensor
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| #Modified by Marlon Jones (@VirusThePanda) | |
| # Original Author : Matt Hawkins | |
| import smbus | |
| import time | |
| import os | |
| import sys | |
| import urllib | |
| import urllib2 | |
| import bmp180 # Library for BMP180 sensor | |
| import RPi.GPIO as GPIO # GPIO on the Pi | |
| # These can be changed if you need to | |
| DEVICE = 0x77 # Default device I2C address | |
| SMBUSID = 1 # Rev 2 Pi uses 1, Rev 1 uses 0 | |
| LEDGPIO = 17 # GPIO for LED | |
| SWITCHGPIO = 22 # GPIO for switch | |
| INTERVAL = 1 # Delay between each reading (mins) | |
| AUTOSHUTDOWN = 1 # Set to 1 to shutdown on switch | |
| THINGSPEAKKEY = 'ABCDEFGH12345678' | |
| THINGSPEAKURL = 'https://api.thingspeak.com/update' | |
| def switchCallback(channel): | |
| global AUTOSHUTDOWN | |
| # Use this to turn off the Pi with a switch | |
| if AUTOSHUTDOWN==1: | |
| os.system('/sbin/shutdown -h now') | |
| sys.exit(0) | |
| def sendData(url,key,field1,field2,temp,pres): | |
| """ | |
| Send event to internet site | |
| """ | |
| values = {'key' : key,'field1' : temp,'field2' : pres} | |
| postdata = urllib.urlencode(values) | |
| req = urllib2.Request(url, postdata) | |
| log = time.strftime("%d-%m-%Y,%H:%M:%S") + "," | |
| log = log + "{:.1f}C".format(temp) + "," | |
| log = log + "{:.2f}mBar".format(pres) + "," | |
| try: | |
| # This will send your results to youe Thingspeak Account | |
| response = urllib2.urlopen(req, None, 5) | |
| html_string = response.read() | |
| response.close() | |
| log = log + 'Update ' + html_string | |
| except urllib2.HTTPError, e: | |
| log = log + 'Server could not fulfill the request. Error code: ' + e.code | |
| except urllib2.URLError, e: | |
| log = log + 'Failed to reach server. Reason: ' + e.reason | |
| except: | |
| log = log + 'Unknown error' | |
| print log | |
| def main(): | |
| global DEVICE | |
| global SMBUSID | |
| global LEDGPIO | |
| global SWITCHGPIO | |
| global INTERVAL | |
| global AUTOSHUTDOWN | |
| global THINGSPEAKKEY | |
| global THINGSPEAKURL | |
| if os.path.isfile('/boot/templogger.cfg')==True: | |
| print "Found templogger.cfg" | |
| f = open('/boot/templogger.cfg','r') | |
| data = f.read().splitlines() | |
| f.close() | |
| if data[0]=='Temp Logger': | |
| print "Using templogger.cfg" | |
| DEVICE = int(data[1],16) | |
| SMBUSID = int(data[2]) | |
| LEDGPIO = int(data[3]) | |
| SWITCHGPIO = int(data[4]) | |
| INTERVAL = int(data[5]) | |
| AUTOSHUTDOWN = int(data[6]) | |
| THINGSPEAKKEY = data[7] | |
| THINGSPEAKURL = data[8] | |
| # Setup GPIO | |
| GPIO.setmode(GPIO.BCM) | |
| GPIO.setwarnings(False) | |
| # LED on GPIO17 | |
| GPIO.setup(LEDGPIO , GPIO.OUT) | |
| # Switch on GPIO22 as input pulled LOW by default | |
| GPIO.setup(SWITCHGPIO, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) | |
| # Define what function to call when switch pressed | |
| GPIO.add_event_detect(SWITCHGPIO, GPIO.RISING, callback=switchCallback) | |
| bus = smbus.SMBus(SMBUSID) | |
| try: | |
| while True: | |
| GPIO.output(LEDGPIO, True) | |
| (temperature,pressure)=bmp180.readBmp180(DEVICE) | |
| sendData(THINGSPEAKURL,THINGSPEAKKEY,'field1','field2',temperature,pressure) | |
| sys.stdout.flush() | |
| # Toggle LED while we wait for next reading | |
| for i in range(0,INTERVAL*60): | |
| GPIO.output(LEDGPIO, not GPIO.input(LEDGPIO)) | |
| time.sleep(1) | |
| except : | |
| # Reset GPIO settings | |
| GPIO.cleanup() | |
| if __name__=="__main__": | |
| main() |
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