Internet of Things (IoT)-based health monitoring system is centred on continuous, real-time monitoring of the health of individuals. The emergence of IoT-enabled healthcare devices is rapidly changing the health infrastructure. IoT-enabled technologies can facilitate an effortless interaction among different devices and platforms. Smart health monitoring applications are a notable and important application in IoT and therefore, different types of IoT frameworks have been proposed by researchers. In the present work, an IoT–based real-time healthcare prototype has been implemented using unobtrusive heterogeneous sensor nodes to create a Wireless Body Area Network (WBAN) architecture. The prototype has been designed to collect vital parameters of the human body using heterogeneous sensors like: electrocardiogram (ECG), temperature, Saturation of peripheral oxygen (SPO2), and pulse rate. The collected data from the prototype shows the condition of the patient in a graphical user interface (GUI) in compliance with the Modified Early Warning Score (MEWS) medical guidelines. The prototype along with the user interface is named SWAST KHOJ. The data is periodically uploaded with the timestamp information on the local server. Further, the Quality of Service (QoS) parameter of the prototype is evaluated for different short-range communication like LAN (or Wire), ZigBee, and Bluetooth in an indoor environment. The performance of the proposed prototype is evaluated on different communication technologies and it was observed that the proposed prototype requires an end-to-end delay of 0.514 ms, 0.62 ms, 0.417 ms and 1.92 ms for wire, Wi-Fi, ZigBee and Bluetooth respectively. Also, it is observed that the end-to-end delay of the proposed method is less than that of the previous works. Moreover, the throughput of the prototype using different communication technology has been evaluated for the prototype.