Dear @BartButenaers
The module looks exactly like what I need but whenever I use the heatmap node in Node-RED I receive the following error:
"TypeError: Cannot read property 'push' of undefined"
I didn't connect any nodes to it. Only by dragging it to the canvas and depoying it. That's it.
My Node-RED runs on the IBM Cloud. Should be up to date tho. I use version 2.1.1.
Would love to use your node since it's amazingly looking!
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