diff --git a/README.md b/README.md
index 44e2db2..36f47fa 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ It will also help you configure the host and credentials for the mqtt server in
 
 ### Manual
 
-If you don't like the automated installation here are manuall installation instructions:
+If you don't like the automated installation here are manuall installation instructions (missing the creation of virtual environment).
 
 1. Install pip if you don't have it:
 
@@ -131,10 +131,26 @@ The group message looks like this:
 Run Raspberry Pi MQTT Monitor (you might need to update the path in the command below, depending on where you installled it)
 
 ```bash
-/usr/bin/python3 /home/pi/rpi-mqtt-monitor/rpi-cpu2mqtt.py
+/usr/bin/python3 /home/pi/rpi-mqtt-monitor/rpi-cpu2mqtt.py -d
 ```
 
-Once you run Raspberry Pi MQTT monitor there will be no output if it run OK, but you should get 8 or more messages via the configured MQTT server (the messages count depends on your configuration).
+Once you run Raspberry Pi MQTT monitor you should see something like this:
+
+```
+Hostname: ubuntu-pc
+CPU Load: 30.8
+CPU Temp: 66
+Used Space: 11
+Voltage: False
+CPU Clock Speed: False
+Swap: False
+Memory: 65
+Uptime: 0
+Wifi Signal: False
+Wifi Signal dBm: False
+RPI5 Fan Speed: False
+Git Update: on
+```
 
 ## Schedule Raspberry Pi MQTT Monitor execution
 
diff --git a/src/rpi-cpu2mqtt.py b/src/rpi-cpu2mqtt.py
index f1aefaf..d4ec09c 100644
--- a/src/rpi-cpu2mqtt.py
+++ b/src/rpi-cpu2mqtt.py
@@ -12,7 +12,7 @@ import paho.mqtt.client as paho
 import json
 import config
 import os
-
+import argparse
 
 # get device host name - used in mqtt topic
 hostname = socket.gethostname()
@@ -358,6 +358,13 @@ def bulk_publish_to_mqtt(cpu_load=0, cpu_temp=0, used_space=0, voltage=0, sys_cl
     
     
 if __name__ == '__main__':
+    # parse arguments
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-d', action='store_true', help='Display values on screen', default=False)
+    args = parser.parse_args()
+
+
+
     # set all monitored values to False in case they are turned off in the config
     cpu_load = cpu_temp = used_space = voltage = sys_clock_speed = swap = memory = uptime_days = wifi_signal = wifi_signal_dbm = rpi5_fan_speed = git_update = False
 
@@ -393,6 +400,22 @@ if __name__ == '__main__':
     if config.git_update:
         git_update = check_git_update()
 
+    if args.d:
+        print("Hostname: " + hostname)
+        print("CPU Load: " + str(cpu_load))
+        print("CPU Temp: " + str(cpu_temp))
+        print("Used Space: " + str(used_space))
+        print("Voltage: " + str(voltage))
+        print("CPU Clock Speed: " + str(sys_clock_speed))
+        print("Swap: " + str(swap))
+        print("Memory: " + str(memory))
+        print("Uptime: " + str(uptime_days))
+        print("Wifi Signal: " + str(wifi_signal))
+        print("Wifi Signal dBm: " + str(wifi_signal_dbm))
+        print("RPI5 Fan Speed: " + str(rpi5_fan_speed))
+        print("Git Update: " + str(git_update))
+
+
     # Publish messages to MQTT
     if hasattr(config, 'group_messages') and config.group_messages:
         bulk_publish_to_mqtt(cpu_load, cpu_temp, used_space, voltage, sys_clock_speed, swap, memory, uptime_days, wifi_signal, wifi_signal_dbm, rpi5_fan_speed, git_update)