When you link to this page from a Tweet Twitter will pick up on the embedded Twitter Card
in this page and include the below chart in the tweet summary.
Twitter does not refresh the cards very often (~24 hours) so the chart shown by twitter may be up-to 24 hours old.
Alternatively you may wish to embed the chart directly in a tweet. Use the link: https://ddd.Tinamous.com/api/v1/devices/e1cd1742-b5e5-4cac-8e63-9c3f1f0a83fe/TwitterCard/0/VBatt?t=1594245104
Note that this device needs to be set to allow anonymous view in order for Twitter and Twitter users to view it.