I'm sure this is a simple question, but I can't find the answer!
I want to establish a direct connection to the command interface over a local network using my software. The final aim is to have scripts running on a linux web server retreiving real time measurements from the DT80.
The DT80 is happily running on a local network, and there is no problem connecting with deTransfer and other utilities. The internal web and ftp servers are running smoothly too.
My initial test is to establish a connection to the command interface on port 7700 with a terminal program to prove the connection, but I must be missing something. I can't get any response from the DT80. Do I need to send an initial string with user name and password?
There must be an explanation or example of this somewhere, and I'd be very grateful if anyone can point me in the right direction.

Hi James,

Your approach was correct you can use the logger IP address (on the Ethernet connection) and port 7700 using an external command interface. We have done this using Hyperterminal, Putty, or even an Android WiFi terminal app for mobile phones in case you have connected the logger to a wireless network.

If your logger is protected by the user role setting or command password, you will not get any response. You can try to send the password command, if it returns 1 then there is an active command password. Or you can use the sign on command, followed by admin for both username and password to get past the user role security.

A firewall is another thing that can prevent the connection.

Best regards,
dataTaker Expert

"""
Python 3.11 code to read measurement data from DT80 datalogger
"""
import socket
HOST = "192.168.1.100" # DT80 IP
PORT = 7700
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect((HOST, PORT))

# enable logging
s.send(b"/E/M/R\r\n")
# read data
data = s.recv(1024).decode("utf-8")
print(f"{data}")
# disconnect
s.send(b"/e/m/r\r\n")