Networking||Mechanical Keys||Morse Code||Telegraph

• Original name: Three-button telegraph machine
• There are only three keys. Use Morse code (click to enter Baidu Encyclopedia introduction) or use Wangsi code (will be placed in the attachment)
• Three keys, respectively representing point signal "・", long signal "—", and split (confirm key, return key and other function keys)
• Networking (use esp8266 to access the Internet or LAN) pre-use mqtt, which will be networked together with other clients (such as mobile phones, etc.) - that is, cross-platform telegram
• The code will be continuously updated
• I am a student, and I have experienced difficulty in contacting people because my mobile phone was confiscated. This is used as an emergency communication tool or entertainment device.
• There are as many as 60,000 Chinese characters, and there are only about 10,000 commonly used Chinese characters, so 10 to the 4th power (10,000) is used to represent it. The Chinese code table uses four Arabic numerals as code names, referred to as "four-code telegrams". They are arranged in four-digit order from 0001 to 9999. Four-digit numbers can be used to represent up to 10,000 Chinese characters, letters and symbols. Chinese characters are arranged by radicals first and then by strokes. Letters and symbols are placed at the end of the code list.
  Chinese code application: Chinese code can be used as a Chinese input method in computers. However, because Chinese code is an "irrational code", it is difficult to remember and it is almost impossible for ordinary users to master and use it proficiently. If there are auxiliary tools, in theory, a telegraph machine can be used to send Chinese characters

Special symbols
These are combinations of dots and dashes with special meanings. They are used as two letters of Morse code concatenated into one, thus eliminating the intermediate time required to normally send them as two letters.
AR:·—·—·(stop, message ends)
AS:·—···(wait)
K:—·—(invitation to transmit signal) (generally followed by AR, meaning "it's your turn")
SK:··· —·—(termination, end of contact)
BT: —···—(separator)
···—·(I will resend the last word)
·· ··(same)
········( mistake)