basic dust collection control over mqtt

README.md

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+# LinuxCNC and Tasmota Automatic Dust Control System
+
+Basic Python script that uses LinuxCNCs built in Python module.
+It is expected to run this script on the same machine running LinuxCNC
+
+## Prerequisites
+
+```
+pip install paho-mqtt
+```
+
+Editing the variables at the top of the script should make it somewhat flexible.

main.py

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+import linuxcnc
+import time
+import paho.mqtt.client as mqtt
+
+lcnc_stat = linuxcnc.stat()
+
+MQTT_HOST='192.168.1.1'
+MQTT_PORT=1883
+CMND_TOPIC='cmnd/tasmota_E74A79/POWER'
+MSG_ON='ON'
+MSG_OFF='OFF'
+#STAT_TOPIC='stat/tasmota_E74A79/POWER'
+
+DELAY = 5
+we_started = False
+running = False
+
+# The callback for when the client receives a CONNACK response from the server.
+def on_connect(client, userdata, flags, rc):
+    try:
+        client.subscribe(STAT_TOPIC)
+    except: pass
+
+# The callback for when a PUBLISH message is received from the server.
+def on_message(client, userdata, msg):
+    s = str(msg.payload)
+    print(s)
+    if s == MSG_ON:
+        running = True
+    elif s == MSG_ON:
+        running = False
+
+client = mqtt.Client()
+client.on_connect = on_connect
+client.on_message = on_message
+
+client.connect_async(MQTT_HOST, MQTT_PORT, 60)
+
+client.loop_start()
+
+while True:
+    lcnc_stat.poll()
+
+    #print(lcnc_stat.spindle[0])
+    #continue
+    if lcnc_stat.spindle[0]['enabled'] == 1 and not running and not we_started:
+        client.publish(CMND_TOPIC, MSG_ON)
+        we_started = True
+
+    elif lcnc_stat.spindle[0]['enabled'] == 0 and we_started == True:
+        time.sleep(DELAY)
+        client.publish(CMND_TOPIC, MSG_OFF)
+        we_started = False