Raspberry Pi - Data Logging and Databases
You want to store sensor data with multiple tags and fields in InfluxDB on Raspberry Pi. Which Python dictionary correctly represents a data point for writing with the client?
You want to store sensor data with multiple tags and fields in InfluxDB on Raspberry Pi. Which Python dictionary correctly represents a data point for writing with the client?
hard🚀 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand tags vs fields
Tags are indexed strings used for metadata; fields are actual data values (numbers or strings).Step 2: Check data types and placement
{"measurement": "sensor", "tags": {"location": "lab", "device": "A1"}, "fields": {"temp": 21.5, "humidity": 45}} correctly places location and device as tags, temp and humidity as fields with numeric values.Final Answer:
{"measurement": "sensor", "tags": {"location": "lab", "device": "A1"}, "fields": {"temp": 21.5, "humidity": 45}} -> Option DQuick Check:
Tags = metadata strings, Fields = data values [OK]
Quick Trick: Tags = strings, Fields = numeric or string data [OK]
Common Mistakes:
MISTAKES- Swapping tags and fields
- Using numeric tags
- Storing numbers as strings in fields
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