1.
April 7, 2021

2.
• Travel addict
• Photography enthusiast
• Tech interested
• Robotics/Industrial engineer

3.
Why are we here?

4.
source cloud.google.com
source edition.cnn.com

5.
What is going on at my place?

6.
Monitor internet speed day & night
 Collect data
 View data

7.
Monitor internet speed day & night
 Collect data
 View data
… and what can I do if I’m not at home?

8.
NEED
 Measure
 Store
 Visualize
 Communication
HOW-TO
 Raspberry Pi
 Spreadsheet
 Spreadsheet
 Not possible

9.
PRO
 Easy to implement
 Low effort to present data
CONS
 Local
 Requires PC to open file
 Writing data (concurrency)
 SD card corruption
Need to find a better solution!

10.
NEED
 Measure
 Store
 Visualize
 Communication
HOW-TO
 Raspberry Pi
 InfluxDB
 Grafana
 Sense-hat
 Telegram

11.
PRO
 Nothing to store locally
 Maintenance not on me!
 Possibility to learn flux!
CONS
 Not much!!
Time to switch to influxdb2!

12.
 Several options available
 Needed
▪ PublicAPI
▪ Scriptable
▪ Debian-like compatible
 Not needed
▪ 100% uptime
▪ Certification
speedtest.net
speedtest CLI

13.
 Time Series DB
 Needed
▪ Free
▪ Cloud based
▪ Public API
 Not needed
▪ 100% uptime
▪ Large storage
influxdata
cloud free tier

14.
 Dashboard
 Needed
▪ Free
▪ Cloud based
▪ Nice-looking
▪ App based (desiderata)
 Not needed
▪ 100% uptime
▪ Lots of dashboards
Grafana
cloud free

15.
 Somehow give fast feedback
about my network
 Needed
▪ Free
▪ Request based
▪ Easy to implement
 Not needed
▪ 100% uptime
telegram
custom bot

16.
Let’s look at the implementation

17.
RaspberryPi #1
RaspberryPi #2
info: astro-pi.org

18.
INTERACTIVE
$ speedtest
Speedtest by Ookla
Server: <Server Name> (id = <Server ID>)
ISP: <ISP>
Latency: 6.87 ms (1.95 ms jitter)
Download: 77.37 Mbps (data used: 62.7 MB)
Upload: 19.98 Mbps (data used: 9.0 MB)
Packet Loss: 0.0%
Result URL: https://www.speedtest.net/result/c/<UUID>
SCRIPTED
$ speedtest --format json
{ "type": "result",
"timestamp": "2021-04-07T18:00:00Z",
"ping":
{ "jitter": 0.696,
"latency": 6.645 },
"download":
{ "bandwidth": 7662563,
"bytes": 47087360,
"elapsed": 5914 },
"upload":
{ "bandwidth": 2197125,
"bytes": 7004736,
"elapsed": 3607 },
"packetLoss": 0,
"isp": "<ISP>",
"interface":
{ "internalIp": "<LAN ip>",
"name": "<LAN interface name>",
"macAddr": "<LAN interface MAC>",
"isVpn": false,
"externalIp": "<Public IP>" },
"server":
{ "id": <Server ID>,
"name": "<Server Name>",
"location": "<Server Location>",
"valcountry": "Italy",
"host": "<Server Host>",
"port": 8080,
"ip": "<Server IP>" },
"result":
{ "id": "<UUID>",
"url": https://www.speedtest.net/result/c/<UUID>}
}

19.
[[outputs.influxdb_v2]]
urls = [ "${SPEEDTEST_SERVERURL}" ]
token = "${SPEEDTEST_TOKEN}"
organization = "${SPEEDTEST_ORGANIZATION}"
bucket = "${SPEEDTEST_BUCKET}"
[[processors.converter]]
[processors.converter.fields]
string = [
"server_id",
]
integer = [
"server_port",
]
float = [
"download_bandwidth",
"download_bytes",
"download_elapsed",
"upload_bandwidth",
"upload_bytes",
"upload_elapsed",
"packetLoss",
"ping_latency",
"ping_jitter",
]
[[inputs.exec]]
interval = "15m"
commands = [
"/usr/bin/speedtest --accept-license --accept-gdpr -f
json",
]
name_override="${SPEEDTEST_MEASUREMENT}"
timeout = "60s"
data_format = "json"
json_time_format = "2006-01-02T15:04:05Z"
json_time_key = "timestamp"
tag_keys = [
"interface_externalIp",
"interface_internalIp",
"isp",
"server_host"
]
json_string_fields = [
"server_location",
"server_name",
"server_testcountry",
"server_ip",
"result_id",
"result_url",
]

20.
from(bucket: mybucket)
|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
|> filter(fn: (r) =>
r["_measurement"] == mymeasurement and (
r["_field"] == "download_bandwidth" or
r["_field"] == "upload_bandwidth" or
r["_field"] == "ping_latency"
)
)
|> keep(columns: ["_time", "_field", "_value"])
|> aggregateWindow(every: v.windowPeriod, fn: valmean, createEmpty: false)
|> map(fn: (r) => ({
r with _value: if (r._field == "download_bandwidth" or r._field == "upload_bandwidth") then
r._value * 8.0 else r._value
})
)

21.
from(bucket: mybucket)
|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
|> filter(fn: (r) =>
r["_measurement"] == mymeasurement and (
r["_field"] == "download_bandwidth" or r["_field"] == "upload_bandwidth" or r["_field"] == "ping_latency" or r["_field"] ==
"server_name" or r["_field"] == "packetLoss" or r["_field"] == "server_location")
)
|> pivot(rowKey:["_time"], columnKey:["_field"], valueColumn:"_value")
|> group(columns: ["server_host"])
|> keep(columns: ["download_bandwidth", "upload_bandwidth", "ping_latency", "packetLoss", "server_location", "server_name", "serve
r_host"])
|> reduce(identity: {
server_name: "", server_location: "", valcount: 0.0, download_bandwidth: 0.0, upload_bandwidth: 0.0, ping_latency: 0.0, packet
Loss: 0.0, },
fn: (r, accumulator) => ({
server_name: r.server_name,
server_location: r.server_location,
valcount: accumulator.valcount + 1.0,
download_bandwidth: (r.download_bandwidth + accumulator.download_bandwidth * accumulator.valcount) / (accumulator.valcount + 1
.0),
upload_bandwidth: (r.upload_bandwidth + accumulator.upload_bandwidth * accumulator.valcount) / (accumulator.valcount + 1.0),
ping_latency: (r.ping_latency + accumulator.ping_latency * accumulator.valcount) / (accumulator.valcount + 1.0),
packetLoss: (r.packetLoss + accumulator.packetLoss * accumulator.valcount) / (accumulator.valcount + 1.0),
})
)
|> map(fn: (r) => ({ r with download_bandwidth: r.download_bandwidth * 8.0, upload_bandwidth: r.upload_bandwidth * 8.0 }))
|> drop(columns: ["server_host"])

22.
from(bucket: mybucket)
|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
|> filter(fn: (r) =>
r["_measurement"] == mymeasurement and (
r["_field"] == "results_id" or
r["_field"] == "server_name" or
r["_field"] == "server_location"
)
)
|> keep(columns: ["_time", "_field", "_value"])
|> sort(columns: ["_time"], desc: true)

23.
import "experimental"
import "date"
option task = {name: "DailyMinMax", cron: "0 2 * * *"}
today = () => (date.truncate(t: now(), unit: 1d))
yesterday = (boundary="start") => {
timeValue = if boundary == "end" then experimental.subDuration(d: 1ns, from: today()) else experimental.subDuration(d: 24h, from: today())
return timeValue
}
from(bucket: mybucket)
|> range(start: yesterday(), stop: yesterday(boundary: "end"))
|> timeShift(duration: 1h, columns: ["_start", "_stop", "_time"])
|> filter(fn: (r) => (r["_measurement"] == mymeasurement and (r["_field"] ==
"download_bandwidth" or r["_field"] == "upload_bandwidth" or r["_field"] == "pingLatency")))
|> keep(columns: ["_time", "_field", "_value"])
|> reduce(identity: { valcount: 0.0, valmin: 0.0, valmax: 0.0, valmean: 0.0, }, fn: (r, accumulator) =>
({
valcount: accumulator.valcount + 1.0,
valmin: if accumulator.valcount == 0.0 then r._value else if r._value < accumulator.valmin then r._value else accumulator.valmin,
valmax: if accumulator.valcount == 0.0 then r._value else if r._value > accumulator.valmax then r._value else accumulator.valmax,
valmean: (r._value + accumulator.valmean * accumulator.valcount) / (accumulator.valcount + 1.0),
}))
|> map(fn: (r) => ({r with _time: yesterday(boundary: "end"), _measurement: "daily", data: r._field}))
|> to( bucket: <mybucket>, org: <myorganization>, tagColumns: ["data"], fieldFn: (r) =>
({ "valcount": r.valcount, "valmean": r.valmean, "valmin": r.valmin, "valmax": r.valmax, }))

24.
 Visual feedback
 Periodical & on-demand
Python + AstroPi(kind-of)
info: astro-pi.org
[...]
self.query = 'import "math"
from(bucket: "' + self.bucket + '")
|> range(start: -1d)
|> filter(fn: (r) =>
r["host"] == "%s" and
r["_measurement"] == "' + self.measurement + '" and (
r["_field"] == "download_bandwidth" or
r["_field"] == "upload_bandwidth" or
r["_field"] == "ping_latency"
)
)
|> keep(columns: ["_time", "_field", "_value"])
|> sort(columns: ["_time"], desc: false)
|> last()
|> map(fn: (r) => ({
r with _value: if (r._field == "download_bandwidth" or r._field ==
"upload_bandwidth") then math.round(x: (r._value * 8.0 / 10000.0)) /
100.0 else r._value
})
)
|> pivot(rowKey:["_time"], columnKey: ["_field"], valueColumn:
"_value")'
db_client = InfluxDBClient(url=self.url, token=self.token,
org=self.org)
db_data = db_client.query_api().query_stream(query=(self.query_string
% hostsname), org=self.org)
[...]

25.
 Visual feedback
 Periodical & on-demand
Python + AstroPi(kind-of)
info: astro-pi.org
[...]
self.query = 'import "math"
from(bucket: "' + self.bucket + '")
|> range(start: -1d)
|> filter(fn: (r) =>
r["host"] == "%s" and
r["_measurement"] == "' + self.measurement + '" and (
r["_field"] == "download_bandwidth" or
r["_field"] == "upload_bandwidth" or
r["_field"] == "ping_latency"
)
)
|> keep(columns: ["_time", "_field", "_value"])
|> sort(columns: ["_time"], desc: false)
|> last()
|> map(fn: (r) => ({
r with _value: if (r._field == "download_bandwidth" or r._field ==
"upload_bandwidth") then math.round(x: (r._value * 8.0 / 10000.0)) /
100.0 else r._value
})
)
|> pivot(rowKey:["_time"], columnKey: ["_field"], valueColumn:
"_value")'
db_client = InfluxDBClient(url=self.url, token=self.token,
org=self.org)
db_data = db_client.query_api().query_stream(query=(self.query_string
% hostsname), org=self.org)
[...]

26.
PROS
 Something quick and easy
 On demand
 Custom telegram bot on
Raspberry Pi
CONS
 No slack app & workspace
 No live notifications (yet)
 No service in case of network
issues

27.
PROS
 Something quick and easy
 On demand
 Custom telegram bot on
Raspberry Pi
CONS
 No slack app & workspace
 No live notifications (yet)
 No service in case of network
issues

28.
 Do not use random test server
 Select optimal test server
 Use good hardware at home

29.
 Integration with Smart Speakers (?)
 Automatic daily reporting
 Event notifications
 …

30.
github.com/mirkodcomparetti/

31.
We look forward to bringing together our
community of developers to learn, interact
and share tips and use cases.
10-11 May 2021
Hands-On Flux Training
18-19 May 2021
Virtual Experience
www.influxdays.com/emea-2021-virtual-experience/