Changes between Initial Version and Version 1 of nodered

Timestamp:

12/17/2021 07:41:19 PM (4 years ago)

Author:

Ryan Erbstoesser

Comment:

start node red page

nodered

@@ +1 @@
+= Node-RED
+
+Node-RED can be used with the Gateworks SBCs. 
+
+Typically, Node-RED may actually run on a server machine and the Gateworks SBC acts as a client and talks back to the server. Or, Node-RED can be install on the Gateworks SBC itself.
+
+= Install Node-RED on Gateworks SBC 
+
+Doing the below commands will make the Gateworks SBC act as the 'server' 
+{{{
+
+    sudo apt-get update
+    sudo apt-get install mosquitto #if wanting to use the MQTT protocol to talk to client
+    sudo apt-get install nodejs #beware Ubuntu default may be 10.19, and it would be better to use a newer version
+    sudo apt-get install npm #get the node package manager
+    sudo npm install -g --unsafe-perm node-red #install node-red using npm
+    node-red
+}}}
+
+Once node-red is running, use a browser to open the node-red gui on port 1880.
+ * eg http://122.24.11.93:1880/
+
+= Create a Client on Gateworks SBC
+{{{
+
+    sudo apt-get update
+    sudo apt-get install python #if wanting to use the MQTT protocol to talk to client
+    sudo apt-get install nodejs #beware Ubuntu default may be 10.19, and it would be better to use a newer version
+
+}}}
+
+Then, create a python script (example below) to send MQTT messages from the client SBC to the server SBC.
+
+== Gateworks Python Script to send MQTT Messages
+{{{
+root@focal-venice:~# cat gateworks.py 
+# Compatible with python 2.* version
+import sys
+import os.path
+import json
+import time
+import random
+import paho.mqtt.client as mqtt
+from datetime import datetime
+
+def callbackMessage(msg):
+    if msg:
+        print("\n--- Command Message Received ---")
+        print(str(msg['ack']))
+        print(str(msg['ackId']))
+        print(str(msg['command']))
+        print(str(msg['uniqueId']))
+
+def callbackTwinMessage(msg):
+    if msg:
+        print("\n--- Twin Message Received ---")
+        print(json.dumps(msg))
+
+def main(argv):
+ while True:
+    try:
+        env = "enter_evn_name_here"
+
+        uniqueId = "enter_device_id_here_example_device1"
+        cpId = "enter_company_id_here_from_avnet_portal"
+        print("in loop")
+        client = mqtt.Client("clientone")
+        broker = "122.24.11.93"
+        client.connect(broker) 
+        client.subscribe("house/bulbs")
+        client.publish("house/bulbs","OFF")
+        print("done publishing")
+
+    except Exception as ex:
+        print(ex.message)
+        sys.exit(0)
+    time.sleep(10)
+
+
+if __name__ == "__main__":
+    main(sys.argv)
+
+}}}
+
+
+