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This article is to share with you about what the main components of Arduino Yun are. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Introduction of main components of Arduino Yun 1.4.1 main components

The main components of Yun are shown in figure 1.4.

Figure 1.4 main components of Arduino Yun

Two processors are integrated on the small board of the Yun. One is ATmega32u4 (label 6), which is the Arduino end controller, connected to MicorUSB (label 8) and two rows of data sockets and ICSP head (label 4). The other processor is in label 3, which is connected to the network interface (label 1), USB host (label 7), and WIFI (label 2). The following describes the role of each labeling part in turn: this article is selected from the Arduino Yun Quick start tutorial

Q network interface (label 1): RJ45 interface, which is our common wired network interface, which is used to connect wired networks.

Q WIFI module (label 2): WIFI module for connecting to a wireless network

Q AR9331 processor (label 3): the processor on the Linux side, which runs on the Linux system OpenWrt-Yun, and its function is to execute some Linux commands.

Q ICSP header (labeled 4): it is usually used to debug ATmega32u4. Programs are usually uploaded to ATmega32u4 through MicroUSB, and when the boot part is damaged, you need to use ICSP to rebuild the boot. Of course, some shields also use it to transmit data.

Q indicator group (label 5): the corresponding indicator has different functions, which is described in 1.4.2

Q ATmega43u4 (label 6): the processor on the Arduino side, which mainly controls two rows of sockets on the Yun, and then the main part of programming is against it.

Q USB Host (label 7): various devices that use this interface standard, such as cameras, can be connected

Q MicroUSB (label 8): functions include providing power to the entire board and programming for ATmega32u4.

1.4.2 indicator group

An enlarged view of the LED group is shown in figure 1.5.

Figure 1.5 indicator group

The corresponding functions of each indicator are as follows: this article is selected from the Arduino Yun Quick start tutorial

Q RX: corresponding to port 0, the receiving indication of serial communication flashes when receiving data

Q TX: corresponding to port 1, the prompt for sending serial communication flashes when sending data

Q L13: connected to port 13, which is lit when port 13 is high

Q WAN: wired network connection indication, lit when there is data exchange on the network line

Q ON: power indication

Q WLAN:WIFI indication, which can also be used to indicate progress when reset on the Linux side

Q USB: indicates that the OpenWrt-Yun port is available and is usually lit after the USB port is fully started.

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