SIM800L Python AT Command Send SMS

$ sudo pip3 install pyserial
$ sudo python3
>>> import serial
>>> phone = serial.Serial('/dev/ttyUSB0', 115200, timeout=5)
>>> phone.write(b'AT\r'); phone.read_until('~~PULU~~')
3
b'AT\r\r\nOK\r\n'
>>> phone.write(b'AT+COPS?\r'); phone.read_until('~~PULU~~')
9
b'AT+COPS?\r\r\n+COPS: 0,0,"EXCELCOM"\r\n\r\nOK\r\n'
>>> phone.write(b'AT+CMGF=1\r'); phone.read_until('~~PULU~~')
10
b'AT+CMGF=1\r\r\nOK\r\n'
>>> phone.write(b'AT+CMGS="+6281234567890"\r'); phone.read_until('~~PULU~~');
25
b'AT+CMGS="+6281234567890"\r\r\n> '
>>> phone.write(b'Aku siap, aku siap\nLalalala\r'); phone.write(bytes([26])); phone.read_until('~~PULU~~')
28
1
b'Aku siap, aku siap\nLalalala\r\n> \r\n+CMGS: 0\r\n\r\nOK\r\n'