Visual stimulus, by virtue of a change in the visual environment in terms of color, intensity, and pattern of the display, is the most promising treatment offered for children who have Autism spectrum disorder (ASD). In this paper, an internet of things (IoT) based bubble tube (IoT-BT) with reconfigurable stimuli settings is proposed to recognize and regulate the over and under stimulating triggers (i.e. sensory threshold) to a specific child. A graphical user interface (GUI) is designed to operate in two modes as Experimental mode (EM) and Therapy mode (TM), with which the therapist can configure various parameters of the bubble tube in terms of color, illumination, and bubble flow rate in different levels. Initially, in EM, the therapist can determine the child’s sensory threshold level by changing stimulating input. Subsequently, in TM, the therapist can regulate the sensory threshold level by following the appropriate therapeutic method. Using a specific feedback form, therapeutic assessments are monitored. Due to the advantage of IoT, effective and timely home-based digital therapy could be possible against long waits and breaks that usually happen in conventional therapy centres.