HC-05 Bluetooth Module heatsink You can use a cooling

You can use a cooling fan to carry away the heat from the hot side

It transfers heat from the cooler side to the hotter side by operating on the principle of the Peltier effect

Voltage: 50V (assumption)

There is a constant 'quiescent' current draw of 6mA

Dimensions: 180 X 70 X 1 cm

HC-05 Bluetooth Module heatsink You can use a coolingThe IoT enabled projects require two way communication between the microcontroller and various sensors. There are various methods you can do that, Wired Communication, WiFi, Bluetooth are some among them. The HC 05 Bluetooth Module adds wireless communication to your project to communicate via Bluetooth to any Bluetooth enabled Laptop or Mobile Device. The module communicates at 9600 baud rate via USART protocol. It can be used in applications like