Thanks @Dmitriy for looking at topic
Yes, it accepts negatives as min/max, but when set (for example) MIN: -10, MAX: +10 and the value received is +5, then the graph is created from -10 (the MIN), passing āzeroā, and stops at +5. Not a real āzero centeredā gauge display. A typical use scenario is off course an energy monitor, when during charging a current flows from circuit to battery, and the opposite during discharging. Sure, a gauge is not āa must haveā, there is always a display widget⦠One can create even a ādigital gaugeā using LCD widget, but IMHO a gauge should be as real as it can be.
Other scenarios:
- a pressure change indicator (drop or rise)
- a level deviation indicator (can be setup as degree angle)
- a voltage meter (with mcp3304 for example)
- etcā¦
As an example: A gauge cannot be setup the way the picture ilustrates
:
