The bluetooth serivice of my android smartphone is disabled on start up or after airplane mode. Seems to be an android issue due to the enabling of bluetooth scanning for location service. To disable the bluetooth scanning go to android setting and select Location, press the 3 dots in upper right corner, select Scanning and disable Bluetooth scanning.
Smart solar water heating solution uses IoT and AI technologies to improve the efficiency of passive solar water heating system. This solution has been developed to take part in the Open IoT Challenge 4.0! Solar water heating Solar water heating (SWH) is the conversion of sunlight into heat for water heating using a solar thermal collector. Solar water heating systems include storage tanks and solar collectors. There are two types of solar water heating systems: active, which have circulating pumps and controls, and passive, which don't. Passive solar water heating systems are typically less expensive than active systems, but they're usually not as efficient. However, passive systems can be more reliable and may last longer. The solar panels heat the water in the storage tank when they are affected by the sun rays. The water reaches the highest temperature when the sun is stronger. If the water in the solar panel is hot the divert valve close the flow towards the bo