Actually is not possible to update a negative number even if in the Nextion editor numbers accept negative values. It's just enough to modify the function bool setValue(uint32_t number); with bool setValue(int32_t number); and use the function itoa instead utoa inside that.
Actually is not possible to update a negative number even if in the Nextion editor numbers accept negative values. It's just enough to modify the function
bool setValue(uint32_t number);withbool setValue(int32_t number);and use the function itoa instead utoa inside that.