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How do I poll sensor twice per second?

Votes:

0

I have a sensor that needs to polled at least twice per second to produce any meaningful data… In my testing so far, it seems that even the desktop version of PRTG struggles with intervals below 5 seconds.

What is the best way forward? For example, should I get my custom sensor to log the data and somehow import that log every 5 seconds? If so, what format should the log be in? I figured out the format (based on https://www.paessler.com/manuals/prtg/custom_sensors#advanced_sensors) to give a sensor a single value for each channel:

reply = read_angles()

result = CustomSensorResult("Sensor added")

result.add_channel(channel_name="X axis",
                   unit="Custom",
                   value=reply['x'],
                   is_float=True,
                   primary_channel=True,
                   is_limit_mode=True,
                   limit_min_error=-46,
                   limit_max_error=46,
                   limit_error_msg="Value out of range")

result.add_channel(channel_name="Y axis",
                   unit="Custom",
                   value=reply['y'],
                   is_float=True,
                   primary_channel=False,
                   is_limit_mode=True,
                   limit_min_error=-46,
                   limit_max_error=46,
                   limit_error_msg="Value out of range")

but don't know how to give a sensor channel multiple values at once...?

api custom-sensor log-stream-data real-time

Created on Feb 14, 2019 11:10:00 PM

Last change on Feb 27, 2023 10:19:40 AM by Yasodhara Das [Paessler Support]



2 Replies

Accepted Answer

Votes:

3

I figured out how to do it!

  1. Based on:
  2. https://www.paessler.com/support/how-to/http-push-monitoring
  3. https://www.paessler.com/manuals/prtg/custom_sensors#advanced_sensors
  4. https://www.paessler.com/manuals/prtg/http_push_data_advanced_sensor#how-to 
import time
import urllib3
from urllib.parse import urlencode
import inclinometer

MOXA_IP = '192.168.1.2'
MOXA_PORT = '5002'
PRTG_SERVER = 'http://192.168.1.2'  # Needs to be http otherwise it doesn't work
PRTG_API = PRTG_SERVER + '/api/'
SENSOR_PORT = '5050'
SENSOR_TOKEN = '12345678'  # See Push Data Advanced

try:
    urllib3.disable_warnings()
    http = urllib3.PoolManager()
    im = inclinometer.Inclinometer(MOXA_IP, MOXA_PORT)
    while True:
        reply = im.read_angles()
        result = f'''{{
                        "prtg": {{
                                    "result": [{{
                                                    "channel": "X axis",
                                                    "value": {reply["x"]}
                                                    "float": 1
                                                }},
                                                {{
                                                    "channel": "Y axis",
                                                    "value": {reply["y"]}
                                                    "float": 1
                                                }}]
                                }}
                     }}'''

        encoded_args = urlencode({'content': result})
        url = f'{PRTG_SERVER}:{SENSOR_PORT}/{SENSOR_TOKEN}?{encoded_args}'
        response = http.request('GET', url)
        time.sleep(0.5)

except KeyboardInterrupt:
    print("User stopped pushing")

Created on Feb 15, 2019 5:06:14 AM

Last change on Feb 27, 2023 10:20:35 AM by Yasodhara Das [Paessler Support]



Votes:

1

Well done, Alex, thank you for sharing your solution!

Created on Feb 15, 2019 6:56:11 AM by Erhard Mikulik [Paessler Support]




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