用于轮询树莓派内部SoC温度的Python脚本

Question

我已经从多个来源拼凑了一个脚本来轮询我的树莓派的内部SoC温度。然后，我想将这些数据流式传输到我的Plotly帐户。

我有一个半工作的脚本，但是一旦芯片温度被读取，它将继续无限期地流式传输温度。作为Python的新手，我似乎无法弄清楚如何(在用户设置的间隔上)获取温度并不断地用新值更新它。我的代码如下:

#!/usr/bin/env python
import plotly.plotly as py # plotly library
from plotly.graph_objs import * # all plotly graph objects
import json # used to parse config.json
import time # timer functions
import datetime
import os # used to acquire internal SoC temperature
import sys
# Initialize some variables with your credentials
with open('./config.json') as config_file:
    plotly_user_config = json.load(config_file)
username = plotly_user_config['plotly_username']
api_key = plotly_user_config['plotly_api_key']
stream_token = plotly_user_config['plotly_streaming_tokens'][0]
# Initialize a Plotly Object
py.sign_in(username, api_key)
# Initialize your graph (not streaming yet)
data = [Scatter(
    x=[],y=[],
    mode='lines+markers',
    stream={'token': stream_token, 'maxpoints': 1000},
    name='UCBPD')
]
layout = Layout(
    title='Raspberry Pi Temperature',
    xaxis={'autorange': True, 'title': 'Time of Day'},
    yaxis={'autorange': True, 'title': 'Degrees (Celsuis)'}
)
your_graph_url = py.plot(Figure(data=data, layout=layout), filename='Raspberry Pi     Temp', auto_open=False)
# Acquire internal SoC temperature
cmd = '/opt/vc/bin/vcgencmd measure_temp'
line = os.popen(cmd).readline().strip()
if "error" in line:
    print "Error ... is your firmware up-to-date? Run rpi-update"
else:
  # line now contains something like: temp=41.2'C
  # to get the temperature, split on =, and then on '
    temp = line.split('=')[1].split("'")[0]
# Initialize the Plotly Streaming Object
stream = py.Stream(stream_token)
stream.open()
# Start looping and streaming!
while True:
    stream.write({'x': datetime.datetime.now(), 'y': temp})
    time.sleep(1) # delay between stream posts

Answer 1

设置temp(温度)变量值的代码需要在while循环中，否则温度变量无法更改。

如果您仍然遇到问题，您应该通过删除配置文件和图形来简化此操作，并仅将原始读数打印到控制台。