Uploaded May 2018 | Updated September 2026, 3 weeks ago

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stevesnoderedguide.com/node-red-mqtt-topic-logger =-This video follows on from an earlier video were we covered using the file node to read and write data to a file.
In this video we take sensor data sent over MQTT and log that data to a file in JSON format.
The flow has an option to log all data or only changed data.
Test data is generated using a Python script.
The flow was tested on a Raspberry pi


dec-2018 Note: I've upgraded the logger to include a control dashboard there is a tutorial here and also a download link.
stevesnoderedguide.com/node-red-mqtt-topic-logger

Related videos and tutorials

Read and Write Data to a File In Node-Red

youtu.be/bI0bQ7pO1kA
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Logging MQTT Sensor Data
steves-internet-guide.com/logging-mqtt-sensor-data
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