Simulate enter key in python serial script -

i'm trying simple telit cc864 cellular module. module controlled at-commands through serial ports. modem control software such minicom, can input following sequence of commands:

input: @ output: ok input: at#sgact=1,1 output: ok input: at#sd=1,0,54321,"30.19.24.10",0,0,1 output: connected input: at#ssend=1 > hello world! >  output: ok 

what connects server have set , sends packet "hello world!". working in minicom. however, trying convert python script. here's have far:

import serial import time  # modem config modem_port = serial.serial() modem_port.baudrate = 115200 modem_port.port = "/dev/tty.usbserial-00002114b" modem_port.parity = "n" modem_port.stopbits = 1 modem_port.xonxoff = 0 modem_port.timeout = 3 modem_port.open()   def send_at_command(command):     modem_port.write(bytes(command+"\r", encoding='ascii'))  def read_command_response():     print(modem_port.read(100).decode('ascii').strip())     print("\n")  if modem_port.isopen():      # check network status     send_at_command("at+creg=1")     read_command_response()      # configure socket     send_at_command("at#scfg=1,1,0,0,1200,0")     read_command_response()      # obtain ip network     send_at_command("at#sgact=1,1")     read_command_response()      # connect aws server     send_at_command("at#sd=1,0,54321,\"30.19.24.10\",0,0,1")     read_command_response()      # send packet aws server     send_at_command("at#ssend=1")     read_command_response()      send_at_command("this sent python script.")     read_command_response()  modem_port.close() 

however, script fails send packet. i'm thinking reason because in minicom, have press enter after hello world! in order send packet. i'm @ loss @ how simulate in python script. suggestions appreciated.

edit:

so reading module documentation more, , seems need send ctrl-z char (0x1a hex) through serial port. know how in python?

note documentation indicated execute command ctrl-z answer has been edited remove references \n , \r

edit:

based on comments, try

def send_at_command(command): modem_port.write(bytes(command+"\1a", encoding='ascii'))