Class: IprogSms::SMS

Inherits:
Object
  • Object
show all
Defined in:
lib/iprog_sms/sms.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port_str = "/dev/ttyUSB0") ⇒ SMS

Returns a new instance of SMS.



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# File 'lib/iprog_sms/sms.rb', line 10

def initialize(port_str = "/dev/ttyUSB0")
  @baud_rate = 9600
  @port_str = port_str  # Use the passed port, or default to "/dev/ttyUSB0"
  @error_message = nil   # Initialize error message
end

Instance Attribute Details

#error_message ⇒ Object (readonly)

Returns the value of attribute error_message.



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# File 'lib/iprog_sms/sms.rb', line 8

def error_message
  @error_message
end

Instance Method Details

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/iprog_sms/sms.rb', line 62

def connected?
  begin
    serial = Serial.new(@port_str, @baud_rate)
    response = send_at_command(serial, "AT")
    serial.close
    response.include?("OK") # Check if the response contains "OK"
  rescue StandardError => e
    @error_message = "Error checking connection: #{e.message}"
    false
  end
end

#send_sms(phone_number, message) ⇒ Object 



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# File 'lib/iprog_sms/sms.rb', line 16

def send_sms(phone_number, message)
  @error_message = nil   # Reset error message before sending

  if connected?
    begin
      # Open the serial connection
      serial = Serial.new(@port_str, @baud_rate)
      result_status = false

      # Set SMS to text mode with a shorter delay
      send_at_command(serial, "AT+CMGF=1", 3)

      # Specify the recipient phone number
      response = send_at_command(serial, "AT+CMGS=\"#{phone_number}\"", 3)
      unless response.include?(">")
        @error_message = "Failed to specify recipient. Response: #{response}"
        result_status  = false
      end

      # Send the actual SMS message, followed by Ctrl+Z (ASCII 26)
      response = send_at_command(serial, "#{message}\x1A", 5)
      if response.include?("+CMGS")
        puts "SMS successfully sent to #{phone_number}."
        result_status = true
      elsif response.include?("+CMS ERROR")
        error_code = response.match(/\+CMS ERROR: (\d+)/)[1]
        @error_message = "Failed to send SMS. Error code: #{error_code}"
        result_status  = false
      else
        @error_message = "Unexpected response while sending SMS: #{response}"
        result_status  = false
      end

      serial.close

      result_status
    rescue StandardError => e
      @error_message = "Error while sending SMS: #{e.message}"
      false
    end
  else
    @error_message = "SIM800C is not connected!"
    false
  end
end