Raspberry + Sensor 的 Plotly 如何？ Python答案

【问题标题】：Raspberry + Sensor to Plotly HOW? PythonRaspberry + Sensor 的 Plotly 如何？ Python
【发布时间】：2018-05-06 14:52:12
【问题描述】：

拯救我的生命。蟒蛇+RASPI！我有一些问题。我有树莓派 3 + 超声波传感器 HC-SR04。我正在读取它的距离，并想在 plot.ly 中使用实时数据图表，但不知道如何：/我找到了用 python readadc.py 编写的用于距离计算的工作代码。：

import RPi.GPIO as GPIO
import time
import signal
import sys

# use Raspberry Pi board pin numbers
GPIO.setmode(GPIO.BCM)

# set GPIO Pins
pinTrigger = 23
pinEcho = 24

def close(signal, frame):
    print("\nTurning off ultrasonic distance detection...\n")
    GPIO.cleanup() 
    sys.exit(0)

signal.signal(signal.SIGINT, close)

# set GPIO input and output channels
GPIO.setup(pinTrigger, GPIO.OUT)
GPIO.setup(pinEcho, GPIO.IN)

while True:
    # set Trigger to HIGH
    GPIO.output(pinTrigger, True)
    # set Trigger after 0.01ms to LOW
    time.sleep(0.00001)
    GPIO.output(pinTrigger, False)

    startTime = time.time()
    stopTime = time.time()

    # save start time
    while 0 == GPIO.input(pinEcho):
        startTime = time.time()

    # save time of arrival
    while 1 == GPIO.input(pinEcho):
        stopTime = time.time()

    # time difference between start and arrival
    TimeElapsed = stopTime - startTime
    # multiply with the sonic speed (34300 cm/s)
    # and divide by 2, because there and back
    distance = (TimeElapsed * 34300) / 2

    print ("Distance: %.1f cm" % distance)
    time.sleep(1)

In this picture i have my distance values

现在我需要与 plotly 建立联系。我已经成功了，我正在连接，但是如何发送绘图值？我无法理解..这是我的第一部分情节连接代码：

import plotly.plotly as py
from plotly.graph_objs import Scatter, Layout, Figure
import time
import readadc

username = 'here_i_write_my_username'
api_key = 'here_i_write_my_api'
stream_token = 'here_i_write_my_token'

py.sign_in(username, api_key)

trace1 = Scatter(
    x=[],
    y=[],
    stream=dict(
        token=stream_token,
        maxpoints=200
    )
)

layout = Layout(
    title='Raspberry Pi Streaming Sensor Data'
)

fig = Figure(data=[trace1], layout=layout)

print py.plot(fig, filename='Raspberry Pi Streaming Example Values')

我不知道下一步该做什么？如何在没有 X 和 Y 的情况下仅发送 1 行数据？我正在尝试这样的事情，但它不起作用。有人可以帮忙结束代码吗？

不工作尝试，什么都不画，空图表：

sensor_pin = 24
readadc.initialize()

i = 0
stream = py.Stream(stream_token)
stream.open()

#the main sensor reading loop
while True:
        sensor_data = readadc.readadc(sensor_pin,readadc.pinEcho)
        stream.write({'x': i, 'y': sensor_data})
        i += 1
        # delay between stream posts
        time.sleep(0.5)

【问题讨论】：

标签： python plotly sensors raspberry-pi3

【解决方案1】：

没关系。我已经搞定了。一切正常

【讨论】：