-
-
Save dazzag24/4656544 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env python | |
| import time | |
| import os | |
| import RPi.GPIO as GPIO | |
| import eeml | |
| from eeml import CosmError | |
| GPIO.setmode(GPIO.BCM) | |
| DEBUG = 1 | |
| LOGGER = 1 | |
| # read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7) | |
| def readadc(adcnum, clockpin, mosipin, misopin, cspin): | |
| if ((adcnum > 7) or (adcnum < 0)): | |
| return -1 | |
| GPIO.output(cspin, True) | |
| GPIO.output(clockpin, False) # start clock low | |
| GPIO.output(cspin, False) # bring CS low | |
| commandout = adcnum | |
| commandout |= 0x18 # start bit + single-ended bit | |
| commandout <<= 3 # we only need to send 5 bits here | |
| for i in range(5): | |
| if (commandout & 0x80): | |
| GPIO.output(mosipin, True) | |
| else: | |
| GPIO.output(mosipin, False) | |
| commandout <<= 1 | |
| GPIO.output(clockpin, True) | |
| GPIO.output(clockpin, False) | |
| adcout = 0 | |
| # read in one empty bit, one null bit and 10 ADC bits | |
| for i in range(12): | |
| GPIO.output(clockpin, True) | |
| GPIO.output(clockpin, False) | |
| adcout <<= 1 | |
| if (GPIO.input(misopin)): | |
| adcout |= 0x1 | |
| GPIO.output(cspin, True) | |
| adcout /= 2 # first bit is 'null' so drop it | |
| return adcout | |
| # change these as desired - they're the pins connected from the | |
| # SPI port on the ADC to the Cobbler | |
| SPICLK = 18 | |
| SPIMISO = 23 | |
| SPIMOSI = 24 | |
| SPICS = 25 | |
| # set up the SPI interface pins | |
| GPIO.setup(SPIMOSI, GPIO.OUT) | |
| GPIO.setup(SPIMISO, GPIO.IN) | |
| GPIO.setup(SPICLK, GPIO.OUT) | |
| GPIO.setup(SPICS, GPIO.OUT) | |
| # COSM variables. The API_KEY and FEED are specific to your COSM account and must be changed | |
| #API_KEY = '5RNOO3ShYJxYiq2V2sgSRtz3112SAKxFQjNDQmNXc0RScz0g' | |
| #FEED = 68872 | |
| API_KEY = 'YOUR_API_KEY' | |
| FEED = YOUR_FEED_ID | |
| API_URL = '/v2/feeds/{feednum}.xml' .format(feednum = FEED) | |
| # temperature sensor connected channel 0 of mcp3008 | |
| adcnum = 0 | |
| while True: | |
| # read the analog pin (temperature sensor LM35) | |
| read_adc0 = readadc(adcnum, SPICLK, SPIMOSI, SPIMISO, SPICS) | |
| # convert analog reading to millivolts = ADC * ( 3300 / 1024 ) | |
| millivolts = read_adc0 * ( 3300.0 / 1024.0) | |
| # 10 mv per degree | |
| temp_C = ((millivolts - 100.0) / 10.0) - 40.0 | |
| # remove decimal point from millivolts | |
| millivolts = "%d" % millivolts | |
| # show only one decimal place for temprature and voltage readings | |
| temp_C = "%.1f" % temp_C | |
| if DEBUG: | |
| print "read_adc0:\t", read_adc0 | |
| print "millivolts:\t", millivolts | |
| print "temp_C:\t\t", temp_C | |
| if LOGGER: | |
| # open up your cosm feed | |
| pac = eeml.Pachube(API_URL, API_KEY) | |
| #send celsius data | |
| pac.update([eeml.Data(0, temp_C, unit=eeml.Celsius())]) | |
| # send data to cosm | |
| try: | |
| pac.put() | |
| except CosmError, e: | |
| print('ERROR: pac.put(): {}'.format(e)) | |
| except StandardError: | |
| print('ERROR: StandardError') | |
| except: | |
| print('ERROR: Unexpected error: %s' % sys.exc_info()[0]) | |
| # hang out and do nothing for 10 seconds, avoid flooding cosm | |
| time.sleep(30) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment