def on_message(mosq, obj, msg):
data = json.loads(msg.payload.decode("utf-8")) # deserialization
sent = int2dt(data['now']) # unix timestamp to datetime.datetime
data['now'] = sent
received = datetime.datetime.utcnow()
lag = received - sent
print("%-20s %d %s lag=%s" % (msg.topic, msg.qos, data, lag))
#mosq.publish('pong', "Thanks", 0)
data_x.append(sent)
data_y.append(data['data']['y'])
line.set_xdata(data_x.all[::-1])
xmin, xmax = data_x.min(), data_x.max()
if xmax > xmin:
ax.set_xlim([xmin, xmax])
line.set_ydata(data_y.all[::-1])
ymin, ymax = data_y.min(), data_y.max()
if ymax > ymin:
ax.set_ylim([ymin, ymax])
plt.pause(0.001)
def tickStrings(self, values, scale, spacing):
# PySide's QTime() initialiser fails miserably and dismisses args/kwargs
#return [QTime().addMSecs(value).toString('mm:ss') for value in values]
return [int2dt(value).strftime("%H:%M:%S.%f") for value in values]