GPS devices are similar to PCs, with N (N ->∞) being integrated by multiple manufacturers, but only a few have the ability to produce CPUs (SiRF, MTK...). In fact, it is even simpler than PC, and the main work is completed by the main chip. A stronger integrator designs their own circuit boards and produces corresponding modules. Just purchase the produced industrial modules that are more counterfeit, put them on the shell and print the logo, and then sell them. Standard GPS receivers and Bluetooth industrial modules are easy to buy, and interested friends can also save up one themselves.

　　The above is to make everyone understand that producing Bluetooth GPS modules is actually a non-technical task, and as long as it is not a counterfeit manufacturer, it can be completed with quality and quantity guaranteed. Just like making steamed buns, the ingredients and techniques are similar. Whether it's Goubuli or Korean steamed buns, although the taste may be different, they always have skin on the outside and filling inside. The biggest difference is choosing different main chips, such as SiRF or MTK, which have a similar relationship to Intel and AMD. There are differences, but both can be used. Different chips may have differences in power consumption and algorithms, but in practical applications, the differences are not significant. I often see people mentioning the receiving signal of a certain chip, but in fact, this question is like discussing which computer with Intel CPU or AMD CPU has higher security, which is just as boring. To apply a common saying, "The old sow chasing the rabbit is not its task at all.".

　　The antenna module is responsible for receiving signals, and the strength of the signal is a physical issue that has nothing to do with the chip. The chip is only responsible for processing the received signal. Of course, this involves an algorithm problem for signal processing. Scientific algorithms can improve signal identification and reduce the impact of errors, but they cannot truly improve the physical level of signal reception. The antenna plays a crucial role in the signal, and its construction can be divided into flat and spiral types. It is also difficult to determine which is good and which is bad. Different technical solutions have their own advantages and disadvantages, but overall, the principle of one inch long and one inch strong is correct.

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Here, I want to talk about how to use the GPS receiver practically.

Origin of GPS development