Can the router WiFi name be in Chinese? I changed the sentence "Don't touch the next door" and was punished by the printer for a whole night. I tried all five types of equipment one by one before deciding the rules.

The cause is small: My wife thinks the WiFi name at home is "SHUNOT"_5G" looked boring, so I casually changed it to "Don't bother next door." Less than ten minutes after the change was completed, the printer in the living room turned against me - when I clicked Print on my phone, the machine in the list was grayed out. When I clicked on it, it prompted "The printer is not connected to the network." Then the WiFi list on the TV box settings page was half empty. The worst thing is that for the newly purchased camera, the WiFi name column on the network configuration page is blank, and scanning the QR code is useless. After a night of fussing about it, I realized that the router WiFi name seems casual, but actually there are more rules than I thought. This article records all the results of my subsequent tests one by one.

Let’s talk about the conclusion first: I can afford it, but first I need to see what equipment I have at home.

The router itself doesn't matter what you call it. I have tried it on the backend of Mercury, Tenda, and Xiaomi. I entered Chinese characters, spaces, and pound signs in the name field. The save was successful, and it was not lost after restarting. The real trouble is not with the router; Even its equipment . The string of characters in the WiFi name is termed SSID. The rules given in the standard are very loose.: The upper limit is 32 bytes, and each company is free to fill in the details. The problem lies in the "freedom of each family" - devices such as mobile phones and computers that have been updated every year have already fully supported Chinese. However, printers, old TV boxes, cameras and other things that "have not been updated for five or six years with the factory firmware" have WiFi modules that are still at the parsing level of ten years ago.

So before choosing a name, count your families first.: If they are all mobile phones, laptops, and smart devices from recent years, and Chinese names are used casually, the probability of real problems is very low. If you have an old printer, old box, or off-brand camera at home, you have to consider it. This is how my family's accounts are calculated: Three of the fourteen pieces of equipment are antiques. It is not worthwhile to bet on three overturns just for a name.

Five categories of names were tested one by one: Chinese, spaces, pound signs, emoji, extra long

After being punished by the printer, I tried my best and tried all the "problem names" with a device at home that could connect to WiFi. Every time you change the name, restart and connect the devices one by one. The results are recorded in the table below:

A few details are worth mentioning separately. The one with the hash mark is the most sinister ： All three devices were found, but the camera stuck when connected to "Connecting". After looking through the information, I realized that symbols such as the pound sign, ampersand, and percent sign are reserved characters in the distribution network protocols of many devices. If they are included in passwords and names, they will be eaten during parsing. If the password is clearly entered correctly, it will report an incorrect password. Emojis look harmless, but they are actually the most likely to overturn ： A smiley occupies 4 bytes. The upper limit of 32 bytes is fine in terms of characters, but it is huge in terms of bytes. Moreover, these graphic symbols are not in the decoding table of old devices at all. It is okay to display them as question marks, but it is miserable if they cannot be searched directly. That day, my wife looked at the string of question marks in the printer list and asked me if I had changed the network. I said it wasn't because I had changed it, but because it couldn't read it.

There is also a "super long" trivia fact: For a 32-byte account, one Chinese character consumes 3 bytes, which means that a pure Chinese name must be at most ten characters long. 「The four words "Don't bother next door" are enough, but if you want to write a short essay on the name of the WiFi, you won't be able to write it.

After changing the name, the device cannot be connected.: There are two emergency routes, follow this order

Once the name is changed, all connected devices lose collective memory - they remember the old name, and the new name is a strange network in their eyes. You only need to manually reconnect your mobile phone and computer and enter the password. The real trouble is with those smart devices that "don't let you manually select a network." There are two ways at this time, don’t reverse the order.:

First, try changing it back first. Change the name back to the original one, wait two minutes, and most smart devices will recover on their own. Their firmware stores old names and passwords, and the numbers are re-aligned as soon as the names come back. This is how my camera saved my life.: Change back to "SHUNOT_Three minutes after "5G", its icon in the App changed from gray to green. This route costs zero, so always be the first to try it.

Article 2: If you can’t change it back, try reconfiguring the network. Some devices are still unrecognizable after their names have been changed, or you simply can’t remember what their original names were. Then you can only follow the reconfiguration process of the device.: Scan the code with the camera, press and hold the button of the sweeper, enter the settings of the box and select the network. When configuring the network, be careful not to include any traps in the name - many people still fail to configure the network again, thinking that the equipment is broken, but in fact it is the hash sign in the new name that is causing trouble. The sweeping machine only recognizes 2.4G and the network distribution keeps failing. I’m here. Sweeper distribution network article Having stepped on it for a complete round is two different things from the name issue, so don’t confuse it.

The dual-band-in-one home actually has two names.

There is another pitfall that is directly related to the name.: Many people have "dual-band-in-one" enabled on their home routers, hiding two networks, 2.4G and 5G, under one name. You think you have changed a name, but in fact there are two columns in the background - the upper column is changed, but the old name is still displayed in the lower column, so there are two WiFi networks at home.: The new name is 5G and the old name is 2.4G. Smart devices only recognize 2.4G, and they are all crowded into the network with the old name. Under the new name of 5G, only mobile phones and computers are left. This is not bad, but many people are confused after changing their name.: How to change one to two?

The name and location of each backstage are different.: Xiaomi has two columns next to each other in the WLAN settings. Mercury calls this switch "Multi-band in one", Tenda's new model calls it "Dual-band in one" and the old model calls it "Dual-band optimal". I want to break down the names of each and the number of channels for feeding 2.4G to smart devices and 5G to feed mobile phones. I am here The article does not switch when roaming I have done the calculations here and here is just a reminder.: When changing the name, take a look at both columns. Don’t leave halfway through. As for the differences between 2.4G and 5G themselves, and who should use each, The article about frequency band selection Write it all.

Four settled naming rules

After taking the test intermittently one night, I established four rules for my family. Now the name of my family is "SHUNOT"_2G" and "SHUNOT_"5G" is a little bit crude, and not one of the fourteen devices is left behind.:

This is the easiest way to go in order.: Count the old equipment before naming it. If there are antiques, always use alphanumeric characters. ； After changing the name, connect the mobile phone first, and then touch the smart device ； If a TV station turns against you, just change it back to its old name and wait two minutes, and you will most likely come back alive. Names are the same as clothes - you don't have to choose your router, it's the equipment that meets people when you go out, and their "aesthetics" are the standard. My wife later admitted that the printer was older than both of us and could not be offended.