def init_plotly_stream():
# init credentials
with open('./credentials.json') as credentials_file:
plotly_user_config = json.load(credentials_file)
# authenticate with provided credentials
plot.sign_in(plotly_user_config["plotly_username"],
plotly_user_config["plotly_api_key"])
# configure the plot
url = plot.plot([{
'x': [],
'y': [],
'type': 'scatter',
'mode': 'lines+markers',
'stream': {
'token': plotly_user_config['plotly_streaming_tokens'][0],
'maxpoints': 200
},
}],
filename='MS-Temperature')
print("View your streaming graph here: ", url)
# attach a stream to the plot
stream = plot.Stream(plotly_user_config['plotly_streaming_tokens'][0])
return stream
def test_stream_unstreamable(self):
# even though `name` isn't streamable, we don't validate it --> pass
py.sign_in(un, ak)
my_stream = py.Stream(tk)
my_stream.open()
my_stream.write(Scatter(x=[1], y=[10], name="nope"))
my_stream.close()
def test_stream_multiple_points(self):
py.sign_in(un, ak)
stream = Stream(token=tk, maxpoints=50)
url = py.plot([Scatter(x=[], y=[], mode='markers', stream=stream)],
auto_open=False,
world_readable=True,
filename='stream-test')
time.sleep(.5)
my_stream = py.Stream(tk)
my_stream.open()
my_stream.write(Scatter(x=[1, 2, 3, 4], y=[2, 1, 2, 5]))
time.sleep(.5)
my_stream.close()
def test_stream_single_points(self):
py.sign_in(un, ak)
stream = Stream(token=tk, maxpoints=50)
res = py.plot(
[Scatter(x=[], y=[], mode="markers", stream=stream)],
auto_open=False,
world_readable=True,
filename="stream-test2",
)
time.sleep(0.5)
my_stream = py.Stream(tk)
my_stream.open()
my_stream.write(Scatter(x=[1], y=[10]))
time.sleep(0.5)
my_stream.close()
def test_stream_layout(self):
py.sign_in(un, ak)
stream = Stream(token=tk, maxpoints=50)
url = py.plot([Scatter(x=[], y=[], mode='markers', stream=stream)],
auto_open=False,
world_readable=True,
filename='stream-test')
time.sleep(.5)
title_0 = "some title i picked first"
title_1 = "this other title i picked second"
my_stream = py.Stream(tk)
my_stream.open()
my_stream.write(Scatter(x=[1], y=[10]), layout=Layout(title=title_0))
time.sleep(.5)
my_stream.close()
my_stream.open()
my_stream.write(Scatter(x=[1], y=[10]), layout=Layout(title=title_1))
my_stream.close()
def test_stream_no_scheme(self):
# If no scheme is used in the plotly_streaming_domain, port 80
# should be used for streaming and ssl_enabled should be False
py.sign_in(un, ak, **{"plotly_streaming_domain": "stream.plot.ly"})
my_stream = py.Stream(tk)
expected_streaming_specs = {
"server": "stream.plot.ly",
"port": 80,
"ssl_enabled": False,
"ssl_verification_enabled": False,
"headers": {
"Host": "stream.plot.ly",
"plotly-streamtoken": tk
},
}
actual_streaming_specs = my_stream.get_streaming_specs()
self.assertEqual(expected_streaming_specs, actual_streaming_specs)
def test_stream_no_scheme(self):
# If no scheme is used in the plotly_streaming_domain, port 80
# should be used for streaming and ssl_enabled should be False
py.sign_in(un, ak, **{'plotly_streaming_domain': 'stream.plot.ly'})
my_stream = py.Stream(tk)
expected_streaming_specs = {
'server': 'stream.plot.ly',
'port': 80,
'ssl_enabled': False,
'ssl_verification_enabled': False,
'headers': {
'Host': 'stream.plot.ly',
'plotly-streamtoken': tk
}
}
actual_streaming_specs = my_stream.get_streaming_specs()
self.assertEqual(expected_streaming_specs, actual_streaming_specs)
def test_stream_https(self):
# If the https scheme is used in the plotly_streaming_domain, port 443
# should be used for streaming, ssl_enabled should be True,
# and ssl_verification_enabled should equal plotly_ssl_verification
ssl_stream_config = {
"plotly_streaming_domain": "https://stream.plot.ly",
"plotly_ssl_verification": True,
}
py.sign_in(un, ak, **ssl_stream_config)
my_stream = py.Stream(tk)
expected_streaming_specs = {
"server": "stream.plot.ly",
"port": 443,
"ssl_enabled": True,
"ssl_verification_enabled": True,
"headers": {
"Host": "stream.plot.ly",
"plotly-streamtoken": tk
},
}
actual_streaming_specs = my_stream.get_streaming_specs()
self.assertEqual(expected_streaming_specs, actual_streaming_specs)
def test_stream_https(self):
# If the https scheme is used in the plotly_streaming_domain, port 443
# should be used for streaming, ssl_enabled should be True,
# and ssl_verification_enabled should equal plotly_ssl_verification
ssl_stream_config = {
'plotly_streaming_domain': 'https://stream.plot.ly',
'plotly_ssl_verification': True
}
py.sign_in(un, ak, **ssl_stream_config)
my_stream = py.Stream(tk)
expected_streaming_specs = {
'server': 'stream.plot.ly',
'port': 443,
'ssl_enabled': True,
'ssl_verification_enabled': True,
'headers': {
'Host': 'stream.plot.ly',
'plotly-streamtoken': tk
}
}
actual_streaming_specs = my_stream.get_streaming_specs()
self.assertEqual(expected_streaming_specs, actual_streaming_specs)
'y': [],
'type': 'scatter',
'stream': {
'token': plotly_user_config['plotly_streaming_tokens'][0],
'maxpoints': 200
}
}],
filename='Raspberry Pi Streaming Example Values')
print("View your streaming graph here: ", url)
# temperature sensor middle pin connected channel 0 of mcp3008
sensor_pin = 1
readadc.initialize()
stream = py.Stream(plotly_user_config['plotly_streaming_tokens'][0])
stream.open()
#the main sensor reading and plotting loop
while True:
try:
sensor_data = readadc.readadc(sensor_pin, readadc.PINS.SPICLK,
readadc.PINS.SPIMOSI,
readadc.PINS.SPIMISO, readadc.PINS.SPICS)
millivolts = sensor_data * (3300.0 / 1024.0)
# 10 mv per degree
temp_C = ((millivolts - 100.0) / 10.0) - 40.0
# convert celsius to fahrenheit
temp_F = (temp_C * 9.0 / 5.0) + 32
# remove decimal point from millivolts