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PiZero > Communication protocol v0.12 > PiZero / ESP8266

This article is for my entry to Pi Zero contest 2016.


  • Terminating with <LF>
  • 115200 8N1
    • 8 data bits
    • no parity
    • 1 stop bit

user commands

  • hello
    • command: hello,[serial number],[name]<LF>
    • return: hello,[name]<LF>
  • check
    • command: check<LF>
    • return: check,[number of messages]<LF>
  • get
    • command: get<LF>
    • return: get,[SenderName],[1st message string],[isSecret(0|1)],[postDate]<LF>
    • memo: get command takes 2000 msec wait to show the sender on 8x2 LCD before showing the message
  • post
    • command: post,[receiver],[message],[isScret(0|1)],[postDate]<LF>
    • return: post,ok<LF>
    • lcdmsg: msg,posted
  • bye
    • command: bye<LF>
    • return: bye,[name]<LF>

For the public message(isSecret==false), the message length for the post is maximum 16 (= 8x2).
For the private message(isSecret==true), the message length can have any length, because the message will not be displayed on the 8x2 LCD, but will be sent through UART.

administrator commands

  • storage
    • command: storage<LF>
    • return: storage,[current usage count]/[maximum storage],<LF>
    • e.g. storage,8/200
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