Add support for execution as service (--service,-s)

README.md

@@ -96,13 +96,14 @@ Populate the variables for MQTT host, user, password and main topic in ```src/co
 
 You can also choose what messages are sent and what is the delay (sleep_time is only used for multiple messages) between them.
 If you are sending a grouped message, and you want to delay the execution of the script you need to use the ```random_delay``` variable which is set to 1 by default.
-This is the default configuration:
+This is the default configuration (check the example file for more info):
 
 ```
 random_delay = randrange(1)
 discovery_messages = True
 group_messages = False
 sleep_time = 0.5
+service_sleep_time = 120
 cpu_load = True
 cpu_temp = True
 used_space = True
@@ -113,7 +114,6 @@ memory = True
 uptime = True
 wifi_signal = False
 wifi_signal_dbm = False
-# this works only on raspbery pi version 5 with stock fan
 rpi5_fan_speed = False
 ```
 

rpi-mqtt-monitor.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=RPI MQTT Monitor
+After=network.target
+
+[Service]
+ExecStart=/home/masoko/git/rpi-mqtt-monitor/rpi_mon_env/bin/python /home/masoko/git/rpi-mqtt-monitor/src/rpi-cpu2mqtt.py --service
+WorkingDirectory=/home/masoko/git/rpi-mqtt-monitor/
+StandardOutput=inherit
+StandardError=inherit
+Restart=always
+User=pi
+
+[Install]
+WantedBy=multi-user.target

src/config.py.example

@@ -30,6 +30,9 @@ qos = 0
 # - if you want a fixed delay you can remove the randrange function and just set the needed value.
 # random_delay = randrange(10)
 
+# this is the time between executiuons if the script is used as service (--service option)
+service_sleep_time = 120
+
 # This is the time  between sending the individual messages
 sleep_time = 0.1
 

src/rpi-cpu2mqtt.py

@@ -360,11 +360,11 @@ 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)
+    parser.add_argument('--display', '-d', action='store_true', help='Display values on screen', default=False)
+    parser.add_argument('--service', '-s', action='store_true', help='Run script as a service', default=False)
     args = parser.parse_args()
 
-
+    while True:
-
         # 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
 
@@ -400,7 +400,7 @@ if __name__ == '__main__':
         if config.git_update:
             git_update = check_git_update()
 
-    if args.d:
+        if args.display:
             print("Hostname: " + hostname)
             print("CPU Load: " + str(cpu_load))
             print("CPU Temp: " + str(cpu_temp))
@@ -414,10 +414,16 @@ if __name__ == '__main__':
             print("Wifi Signal dBm: " + str(wifi_signal_dbm))
             print("RPI5 Fan Speed: " + str(rpi5_fan_speed))
             print("Git Update: " + str(git_update))
-
+            print("")
             
         # 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)
         else:
             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)
+
+        # if not running as a service, break the loop after one iteration
+        if not args.service:
+            break
+        # if running as a service, sleep for 2 minutes before the next iteration
+        time.sleep(config.service_sleep_time)