opc-ua input plugin for telegraf is read successful but does not show any data - opc-ua

Question

My plan is to use telegraf to read opc-ua data from a wago sps as an input and send the data as output to my influxdb database.
Other plugins do work such as the mqtt plugin...so i can verify that the influxdb is correctly set up.
in the my telegraf.config ...
# Retrieve data from OPCUA devices
[[inputs.opcua]]
name = "opcua"
endpoint = "opc.tcp://192.168.178.97:4840"
connect_timeout = "10s"
request_timeout = "5s"
security_policy = "None"
security_mode = "None"
auth_method = "UserName"
username = "admin"
password = "wago"
[[inputs.opcua.group]]
namespace ="4"
identifier_type ="s"
nodes = [
{name="IIoTgateway_xHeartbeat", namespace="4", identifier_type="s", identifier="|var|WAGO 750-8212 PFC200 G2 2ETH RS.Application.GVL_STATUS_PRG.IIoTgateway_xHeartbeat"},
]
Using the tool UA Expert...i can verify that the xHeartbeat changes every 1s...
logs of telegraf plugin looks also good ....
logging into the database (influxdb) i see the variable but not any change...
What is wrong here ?
In the docs of telegraf there is a statement ...about
set the namespaceIndex ..number from 0 to 3....could this be the problem since my namespaceIndex is 4 ?

Answer 1

the config file.
[global_tags]
[agent]
interval = "500ms"
round_interval = true
metric_batch_size = 1000
metric_buffer_limit = 10000
collection_jitter = "0s"
flush_interval = "10s"
flush_jitter = "0s"
precision = "0s"
hostname = ""
omit_hostname = false
###############################################################################
# OUTPUT PLUGINS #
###############################################################################
[[outputs.influxdb_v2]]
urls = ["http://${DOCKER_INFLUXDB_INIT_HOST}:${DOCKER_INFLUXDB_INIT_PORT}"]
token = "$DOCKER_INFLUXDB_INIT_ADMIN_TOKEN"
organization = "$DOCKER_INFLUXDB_INIT_ORG"
bucket = "$DOCKER_INFLUXDB_INIT_BUCKET"
###############################################################################
# AGGREGATOR PLUGINS #
###############################################################################
###############################################################################
# INPUT PLUGINS #
###############################################################################
# Retrieve data from OPCUA devices
[[inputs.opcua]]
name = "opcua"
endpoint = "opc.tcp://192.168.178.97:4840"
connect_timeout = "10s"
request_timeout = "5s"
security_policy = "None"
security_mode = "None"
auth_method = "UserName"
username = "admin"
password = "wago"
[[inputs.opcua.group]]
namespace ="4"
identifier_type ="s"
nodes = [
{name="IIoTgateway_xHeartbeat", namespace="4", identifier_type="s", identifier="|var|WAGO 750-8212 PFC200 G2 2ETH RS.Application.GVL_STATUS_PRG.IIoTgateway_xHeartbeat"},
{name="IIoTgateway_xDoorSwitch", namespace="4", identifier_type="s", identifier="|var|WAGO 750-8212 PFC200 G2 2ETH RS.Application.GVL_IIOT_BOX_INPUTS.IIoTgateway_xDoorSwitch"},
]
[[outputs.file]]
## Files to parse each interval. Accept standard unix glob matching rules,
## as well as ** to match recursive files and directories.
files = ["./tmp/metrics.out"]
data_format = "influx"
rotation_interval = "24h"
rotation_max_archives = 10
after checking the ./tmp/metrics.out file by logging into the container...data comes in correct...
make sure that in the flux
from(bucket: "telegrafmqtt")
|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
|> filter(fn: (r) => r["_measurement"] == "opcua")
|> filter(fn: (r) => r["_field"] == "IIoTgateway_xHeartbeat")
|> toInt()
toInt() did finally the trick...
now i see the 1second heardbeat
last not least...do not use the standart password wago and admin...this is only for testing...also ensure to secure OPC-UA connection...