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29 lines
995 B
Markdown
29 lines
995 B
Markdown
node-red-node-leveldb
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=====================
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A <a href="http://nodered.org" target="_new">Node-RED</a> node to read and write to a LevelDB database.
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Install
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-------
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Run the following command in your Node-RED user directory - typically `~/.node-red`
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npm install node-red-node-leveldb
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Usage
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-----
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Allows basic access to a LevelDB database.
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Uses <a href="https://code.google.com/p/leveldb/" target="_new"><i>LevelDB</i></a> for a simple key value pair database.
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There are two node to choose from...
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Use one node to either <b>put</b> (store) the `msg.payload` to the named database file, using `msg.topic`
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as the key, or to <b>delete</b> information select delete in the properties dialogue and again use `msg.topic` as the key.
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Use the other node to <b>get</b>, or retrieve the data already saved in the database.
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Again use `msg.topic` to hold the <i>key</i> for the database, and the result is returned in `msg.payload`.
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If nothing is found for the key then <i>null</i> is returned.
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