This gist contain two scripts to read temp and humidity from a DHT22 sensor connected on a Raspberry Pi and send values to an Influxdb database.
This is quite dirty as this is just some personnal experiments...
Last active
August 29, 2015 14:07
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Raspberry Pi temp and humidity sensor DHT22
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| #!/bin/bash | |
| while true | |
| do | |
| output=$( python /home/pi/DHT_read.py ) | |
| temperature=$(echo $output | cut -d\ -f1) | |
| humidity=$(echo $output | cut -d\ -f2) | |
| #echo "output : ${output}" | |
| echo -e "$(date) \t Température : ${temperature} \t Humidité : ${humidity}" | |
| curl -X POST "http://play.influxdb.org:8086/db/test/series?u=user&p=password" -d "[{\"name\":\"sensor\",\"columns\":[\"temperature\",\"humidity\"], \ | |
| \"points\":[[${temperature},${humidity}]]}]" | |
| sleep 10 | |
| done |
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| #!/usr/bin/python | |
| # Copyright (c) 2014 Adafruit Industries | |
| # Author: Tony DiCola | |
| # Permission is hereby granted, free of charge, to any person obtaining a copy | |
| # of this software and associated documentation files (the "Software"), to deal | |
| # in the Software without restriction, including without limitation the rights | |
| # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| # copies of the Software, and to permit persons to whom the Software is | |
| # furnished to do so, subject to the following conditions: | |
| # The above copyright notice and this permission notice shall be included in all | |
| # copies or substantial portions of the Software. | |
| # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| # SOFTWARE. | |
| import Adafruit_DHT | |
| # Sensor should be set to Adafruit_DHT.DHT11, | |
| # Adafruit_DHT22, or Adafruit_AM2302. | |
| sensor = Adafruit_DHT.DHT22 | |
| # Example using a Beaglebone Black with DHT sensor | |
| # connected to pin P8_11. | |
| #pin = 'P8_11' | |
| # Example using a Raspberry Pi with DHT sensor | |
| # connected to pin 23. | |
| pin = 4 | |
| # Try to grab a sensor reading. Use the read_retry method which will retry up | |
| # to 15 times to get a sensor reading (waiting 2 seconds between each retry). | |
| humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) | |
| # Note that sometimes you won't get a reading and | |
| # the results will be null (because Linux can't | |
| # guarantee the timing of calls to read the sensor). | |
| # If this happens try again! | |
| if humidity is not None and temperature is not None: | |
| print '{0:0.1f} {1:0.1f}'.format(temperature, humidity) | |
| else: | |
| print 'Failed to get reading. Try again!' |
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