from telnetlib import Telnet

HOST = "10.0.2.15"
user = "admin"
password = "admin"
cmd = "RB"

tn = Telnet(HOST)
tn.read_until(b"User: ", 10)
print("Login request")
tn.write(user.encode('ascii') + b"\n")
tn.read_until(b"Password: ", 10)
print("Password request")
tn.write(password.encode('ascii') + b"\n")
tn.read_until(b"User Logged In", 10)
print("Login succesful")
tn.read_until(b"User Logged In", 10)
tn.write(cmd.encode('ascii') + b"\n")
out = tn.read_until(b'1', 10)
print(out.decode('ascii'))
size = tn.read_until(b'\r\n', 10)
print(size.decode('ascii'))
size = tn.read_until(b'\r\n', 10)
print(size.decode('ascii'))
while (out != b''):
    print(out.decode('ascii'), end="")
    out = tn.read_until(b'\r\n', 10)
#print(out.decode('ascii'))
print("Reading done")
tn.close()