range Pi User Manual Copyright reserved by Shenzhen Xunlong Software Co., Ltd
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OUT, and the pin level is low
6.8.2. 40pin UART test
1) UART7 and UART9 are enabled by default in Android. The position of the 40pin is
shown in the figure below, and the corresponding device nodes are /dev/ttyS7 and
/dev/ttyS9 respectively
2) First click on the wiringOP icon to open the wiringOP APP
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