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This article mainly explains "how to use WRTnode to achieve TTL brush machine", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "how to use WRTnode to realize TTL brush machine"!

TTL printer

Equipment required for brushing: WRTnode core board, WRTnode backplane (or handmade network cable), USB to serial port module, DuPont cable, USB power cable and so on.

First, let's talk about this particular network cable (Figure 1):

Fig. 1

Network Cable Pin Description:

First, you need a T568B cable. T568B network cable is usually used at home for computer connection router or ADSL cat ordinary parallel network cable.

The T568B cable is as follows:

Then cut the net cable and select the four lines of green, green and white, orange and white. The remaining four wires can be cut.

Make the above four wires into a 2*2 Dupont cable plug, and distribute the Dupont cable plug as follows:

After completion, connect the TTL line of the WRTnode board.

TX and RX on WRTnode board (refer to WRTnode pin diagram, Figure 2) shall be connected to RX and TX on usb to serial module correspondingly.

This way we can brush through the serial port, debugging and so on.

Open the PC's Device Manager, check the serial number, install tftp and putty on the PC and turn them on. For example, the serial port number viewed on a PC is com3, the baud rate of uboot is 115200, and the kernel baud rate is 115200 (Figure 4).

Fig. 4

Press the number 2, 2 means download firmware through tftp and burn it to flash, select y

Input device IP =(IP of board, optional)

Input server IP = (ip of tffp server, same segment as device IP)

Input Linux Kernel filename = (name of firmware)

Enter Wait for firmware burn and kernel restart.

Note: If there is garbled code, it may be inconsistent baud rate. At this time, just modify the baud rate of Putty serial port (WRTnode original firmware baud rate is 115200, OpenWRT official website source code baud rate is 57600).

Of course, this process is the tftp service transmission, so you need to use the network cable. If there is a backplane, use an ordinary network cable; if there is no backplane, use the special network cable introduced earlier.

Be patient and wait a few minutes, you'll find WRTnodexxxx when you're done.

At this point, I believe that everyone has a deeper understanding of "how to use WRTnode to achieve TTL brushing", so let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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