InfluxDB for time-series data in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new InfluxDB client connection.

Raspberry Pi

from influxdb_client import InfluxDBClient

client = InfluxDBClient(url=[1], token="my-token", org="my-org")

Drag options to blanks, or click blank then click option'

A"influxdb://localhost"

B"localhost"

C"http://localhost:8086"

D"8086"

Attempts:

3 left

💡 Hint

Common Mistakes

Using only hostname without protocol and port.

Using incorrect URL format.

The URL must include the protocol and port, like "http://localhost:8086" to connect properly.

2fill in blank

medium

Complete the code to write a point with measurement 'temperature' and field 'value' to InfluxDB.

Raspberry Pi

from influxdb_client import Point

point = Point("temperature").field("value", [1])
write_api.write(bucket="my-bucket", record=point)

Drag options to blanks, or click blank then click option'

A25

Btemperature

C"25"

D"value"

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the number inside quotes making it a string.

Using the field name instead of the value.

The field value should be a number, not a string, so use 25 without quotes.

3fill in blank

hard

Fix the error in the query to select temperature values from the last hour.

Raspberry Pi

query = 'from(bucket:"my-bucket") |> range(start: [1])'

Drag options to blanks, or click blank then click option'

A"-1d"

B"-1h"

C"now()"

D"1h"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "now()" which is not a valid start time.

Using "1h" which is a positive duration.

The range start should be "-1h" to get data from the last hour.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each point's time to its temperature value.

Raspberry Pi

result = {record.[1]: record.[2] for record in tables.records}

Drag options to blanks, or click blank then click option'

Atime

Bget_value()

Cvalue

Dget_time()

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'value' attribute which may not exist.

Using 'get_time()' which is not a method.

Use 'time' attribute for the timestamp and 'get_value()' method to get the temperature value.

5fill in blank

hard

Fill all three blanks to write a point with measurement 'humidity', tag 'location', and field 'value'.

Raspberry Pi

point = Point([1]).tag([2], "office").field([3], 60)

Drag options to blanks, or click blank then click option'

A"humidity"

B"location"

C"value"

D"temperature"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'temperature' instead of 'humidity' for measurement.

Mixing tag and field keys.

The measurement is 'humidity', the tag key is 'location', and the field key is 'value'.