To do this, delete an entry in the file /boot/cmdline.txt. Since the serial console would interfere, it must be deactivated. The clock of the mini UART interface is coupled with the GPU clock, which means that the baud rate is not stable, which in turn can cause problems with the connection. By default, the PL011 UART is used for Bluetooth and the mini UART is connected to the RX/TX pins and is also used for the Linux console. The Raspberry 3 has two UART interfaces. PL011 UART (PrimeCell UART) and mini UART. Now some changes in the configuration of the Raspberry Pi 3 are necessary to use the serial interface. Unfortunately I couldn't find a Fritzing library for my module, so here is the circuit diagram for a similar GPS module. Since I only read data here, the transmission line of the GPS module can actually be omitted. RX on the Raspberry with TX on the GPS module or TX on the Raspberry with RX on the GPS module. I use the UART interface, so apart from the power supply, only the RX and TX connections need to be connected crosswise, i.e. The connection of the Neo-6M module is very simple. Who knows, maybe this will be my first order from AliExpress :-) Connection to the serial interface of the Raspberry PI Maybe I'll also try out the NEO-M8 module, especially its performance indoors. Considering what the module can do, I really don't think that's much. The price for the GPS module is around 10 euros. The Neo-7M modules also support the Russian GLONASS satellite navigation system and the Neo-M8 series also supports the European Galileo and Chinese Beidou systems. However, these values only apply under optimal conditions, in reality it can take considerably longer.
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