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Debugging assistant of serial communication based
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The serial port debugging assistant is a serial port debugging tool which is developed according to the actual general needs in practical engineering applications. Only multiple serial port numbers are supported. Support various serial port settings, such as baud rate, check bit, data bit and stop bit, etc. The surface is exquisite and beautiful, and has strong practicability. Support various serial port settings, such as baud rate, check bit, data bit and stop bit, etc. Support ASCII / hex sending, sending and receiving data can be arbitrary conversion between hexadecimal and ASCII code. It can automatically add check bits at the end of the sent data and support multiple check formats. Support interval sending, circular sending, batch processing sending, input data can be imported from external files.
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Calculation of polygon area based on latitude and
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The calculation method is relatively simple,
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Indoor map display based on ol3
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When the indoor environment can not use satellite positioning, the indoor positioning technology is used as the auxiliary positioning of satellite positioning to solve the problem that the satellite signal is weak and can not penetrate the building when it reaches the ground. Finally locate the current position of the object. Wireless local area network (WLAN) composed of wireless access points (including wireless routers) can realize the task of location, monitoring and tracking in complex environment. Based on the location information of the network node (wireless access point), it uses the combination of experience test and signal propagation model to locate the location of the connected mobile devices. The highest accuracy is about 1 m to 20 m. If the location calculation is only based on the currently connected Wi Fi access point, rather than referring to the signal strength composition diagram of the surrounding Wi Fi, then the Wi Fi location is prone to errors (for example, positioning floor error). Through the use of WiFi fingerprint positioning, the positioning points are displayed on the map, and ol3 is used as the map engine to display the published indoor map service.
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