I think you are feeding the charts from the device directly, and for what you want the chart should be feeded by the bucket, if it is feeded by the device, It won’t save information, when refresh the page will start to build the graphic from new data, consulting directly the device.
Thanks for your reply.
The chart is feeded by the bucket.
I can build the chart with all the fields of the bucket, but with some data, the chart disappears after saving et for other datas, the chart remains. (cf. pic)!
Fred