message-server.rb

require 'serialport'
require 'json'
require 'base64'
 
sp = SerialPort.new "/dev/cu.usbmodem1d11", 115200, 8, 1, SerialPort::NONE
imageBytes = ""
loop {
  jsonMessage = sp.gets.tr("\n\r", "")
  begin
    parsedMessage = JSON(jsonMessage)
    if parsedMessage["type"] == "inf"
      puts parsedMessage["msg"]
    elsif parsedMessage["type"] == "img"
      imageBytes += Base64.decode64(parsedMessage["msg"]["seg"]["enc"])
      if parsedMessage["msg"]["seg"]["rem"] <= 0
        # Write the image bytes to a file
        File.open("photo.jpg", "wb") do |f|
          f.write(imageBytes)
        end
        # Clear the image bytes for the next one
        imageBytes = ""
        puts "Wrote an image to the file. Waiting for the next one."
      end
    end
  rescue Exception => e  
    puts e.message
    imageBytes = ""
  end
}