Raspberry pi connect temperature and humidity to onenet (移动云平台)
工具
树莓派连接温度传感器
- #!/usr/bin/python
- import RPi.GPIO as GPIO
- import time
- channel =4
- data = []
- j = 0
- GPIO.setmode(GPIO.BCM)
- time.sleep(1)
- GPIO.setup(channel, GPIO.OUT)
- GPIO.output(channel, GPIO.LOW)
- time.sleep(0.02)
- GPIO.output(channel, GPIO.HIGH)
- GPIO.setup(channel, GPIO.IN)
- while GPIO.input(channel) == GPIO.LOW:
- continue
- while GPIO.input(channel) == GPIO.HIGH:
- continue
- while j < 40:
- k = 0
- while GPIO.input(channel) == GPIO.LOW:
- continue
- while GPIO.input(channel) == GPIO.HIGH:
- k += 1
- if k > 100:
- break
- if k < 8:
- data.append(0)
- else:
- data.append(1)
- j += 1
- print "sensor is working."
- print data
- humidity_bit = data[0:8]
- humidity_point_bit = data[8:16]
- temperature_bit = data[16:24]
- temperature_point_bit = data[24:32]
- check_bit = data[32:40]
- humidity = 0
- humidity_point = 0
- temperature = 0
- temperature_point = 0
- check = 0
- for i in range(8):
- humidity += humidity_bit[i] * 2 ** (7-i)
- humidity_point += humidity_point_bit[i] * 2 ** (7-i)
- temperature += temperature_bit[i] * 2 ** (7-i)
- temperature_point += temperature_point_bit[i] * 2 ** (7-i)
- check += check_bit[i] * 2 ** (7-i)
- tmp = humidity + humidity_point + temperature + temperature_point
- if check == tmp:
- print "temperature :", temperature, "*C, humidity :", humidity, "%"
- else:
- print "wrong"
- print "temperature :", temperature, "*C, humidity :", humidity, "% check :", check, ", tmp :", tmp
- #从这里开始是第二部分
- mytemp = '%f' %temperature
- myhumi = '%f' %humidity
- tmp_output = open('/home/pi/pi/test/dht11/tmp_data.txt', 'w')
- hud_output = open('/home/pi/pi/test/dht11/hum_data.txt', 'w')
- tmp_output.write(mytemp)
- hud_output.write(myhumi)
- tmp_output.close
- hud_output.close
- GPIO.cleanup()
#!/usr/bin/python
import RPi.GPIO as GPIO
import time channel =4
data = []
j = 0 GPIO.setmode(GPIO.BCM) time.sleep(1) GPIO.setup(channel, GPIO.OUT)
GPIO.output(channel, GPIO.LOW)
time.sleep(0.02)
GPIO.output(channel, GPIO.HIGH)
GPIO.setup(channel, GPIO.IN) while GPIO.input(channel) == GPIO.LOW:
continue
while GPIO.input(channel) == GPIO.HIGH:
continue while j < 40:
k = 0
while GPIO.input(channel) == GPIO.LOW:
continue
while GPIO.input(channel) == GPIO.HIGH:
k += 1
if k > 100:
break
if k < 8:
data.append(0)
else:
data.append(1) j += 1 print "sensor is working."
print data humidity_bit = data[0:8]
humidity_point_bit = data[8:16]
temperature_bit = data[16:24]
temperature_point_bit = data[24:32]
check_bit = data[32:40] humidity = 0
humidity_point = 0
temperature = 0
temperature_point = 0
check = 0 for i in range(8):
humidity += humidity_bit[i] * 2 ** (7-i)
humidity_point += humidity_point_bit[i] * 2 ** (7-i)
temperature += temperature_bit[i] * 2 ** (7-i)
temperature_point += temperature_point_bit[i] * 2 ** (7-i)
check += check_bit[i] * 2 ** (7-i) tmp = humidity + humidity_point + temperature + temperature_point if check == tmp:
print "temperature :", temperature, "*C, humidity :", humidity, "%"
else:
print "wrong"
print "temperature :", temperature, "*C, humidity :", humidity, "% check :", check, ", tmp :", tmp
#从这里开始是第二部分
mytemp = '%f' %temperature
myhumi = '%f' %humidity tmp_output = open('/home/pi/pi/test/dht11/tmp_data.txt', 'w')
hud_output = open('/home/pi/pi/test/dht11/hum_data.txt', 'w') tmp_output.write(mytemp)
hud_output.write(myhumi) tmp_output.close
hud_output.close
GPIO.cleanup()
运行代码后会出现两个文件分别来保存温度和湿度,如下图:
这样一来温湿度的数据就保存下来了,然后就是读取并上传了
上传数据至云端
通过代码上传数据
- <span style="font-size: 18px;">import urllib2
- import json
- import time
- import datetime
- APIKEY = '你的APIKey'
- def http_put():
- file = open("/home/pi/pi/test/dht11/tmp_data.txt")
- temperature= float(file.read())
- CurTime = datetime.datetime.now()
- url='http://api.heclouds.com/devices/你的设备ID/datapoints'
- values={'datastreams':[{"id":"temp","datapoints":[{"at":CurTime.isoformat(),"value":temperature}]}]}
- print "the time is: %s" %CurTime.isoformat()
- print "The upload temperature value is: %.3f" %temperature
- jdata = json.dumps(values)
- print jdata
- request = urllib2.Request(url, jdata)
- request.add_header('api-key', APIKEY)
- request.get_method = lambda:'POST'
- request = urllib2.urlopen(request)
- return request.read()
- while True:
- time.sleep(5)
- resp = http_put()
- print "OneNET result:\n %s" %resp
- time.sleep(5)</span>
import urllib2
import json
import time
import datetime APIKEY = '你的APIKey' def http_put():
file = open("/home/pi/pi/test/dht11/tmp_data.txt")
temperature= float(file.read())
CurTime = datetime.datetime.now()
url='http://api.heclouds.com/devices/你的设备ID/datapoints'
values={'datastreams':[{"id":"temp","datapoints":[{"at":CurTime.isoformat(),"value":temperature}]}]} print "the time is: %s" %CurTime.isoformat()
print "The upload temperature value is: %.3f" %temperature jdata = json.dumps(values)
print jdata
request = urllib2.Request(url, jdata)
request.add_header('api-key', APIKEY)
request.get_method = lambda:'POST'
request = urllib2.urlopen(request)
return request.read() while True:
time.sleep(5)
resp = http_put()
print "OneNET result:\n %s" %resp
time.sleep(5)
上传湿度数据代码:
- import urllib2
- import json
- import time
- import datetime
- APIKEY = '你的APIKey'
- def http_put():
- file = open("/home/pi/pi/test/dht11/hum_data.txt")
- humidity= float(file.read())
- CurTime = datetime.datetime.now()
- url='http://api.heclouds.com/devices/11302038/datapoints'
- values={'datastreams':[{"id":"hum","datapoints":[{"at":CurTime.isoformat(),"value":humidity}]}]}
- print "the time is: %s" %CurTime.isoformat()
- print "The upload humidity value is: %.3f" %humidity
- jdata = json.dumps(values)
- print jdata
- request = urllib2.Request(url, jdata)
- request.add_header('api-key', APIKEY)
- request.get_method = lambda:'POST'
- request = urllib2.urlopen(request)
- return request.read()
- time.sleep(5)
- resp = http_put()
- print "OneNET result:\n %s" %resp
- file.closes
import urllib2
import json
import time
import datetime APIKEY = '你的APIKey' def http_put():
file = open("/home/pi/pi/test/dht11/hum_data.txt")
humidity= float(file.read())
CurTime = datetime.datetime.now()
url='http://api.heclouds.com/devices/11302038/datapoints'
values={'datastreams':[{"id":"hum","datapoints":[{"at":CurTime.isoformat(),"value":humidity}]}]} print "the time is: %s" %CurTime.isoformat()
print "The upload humidity value is: %.3f" %humidity jdata = json.dumps(values)
print jdata
request = urllib2.Request(url, jdata)
request.add_header('api-key', APIKEY)
request.get_method = lambda:'POST'
request = urllib2.urlopen(request)
return request.read() time.sleep(5)
resp = http_put()
print "OneNET result:\n %s" %resp
file.closes
数据流问题
自动执行代码并上传数据
- sudo crontab -e
sudo crontab -e
选择nano,也就是2,然后在最后几行添加这么几句话
- */1 * * * * python /home/pi/pi/test/dht11/transfer_tmp.py
- */1 * * * * python /home/pi/pi/test/dht11/transfer_hum.py
- */1 * * * * python /home/pi/pi/test/dht11/cpdht11.py
*/1 * * * * python /home/pi/pi/test/dht11/transfer_tmp.py
*/1 * * * * python /home/pi/pi/test/dht11/transfer_hum.py
*/1 * * * * python /home/pi/pi/test/dht11/cpdht11.py
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