added examples

examples/MQTT/mqtt_example.py

@@ -0,0 +1,39 @@
+# https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/mqtt
+
+import network
+
+def conncb(task):
+    print("[{}] Connected".format(task))
+
+
+def disconncb(task):
+    print("[{}] Disconnected".format(task))
+
+
+def subscb(task):
+    print("[{}] Subscribed".format(task))
+
+
+def pubcb(pub):
+    print("[{}] Published: {}".format(pub[0], pub[1]))
+
+
+def datacb(msg):
+    print("[{}] Data arrived from topic: {}, Message:\n".format(
+        msg[0], msg[1]), msg[2])
+
+# mqtt = network.mqtt(name, server [, user, password, port, autoreconnect, clientid, cleansession, keepalive, qos, retain, secure, connected_cb, disconnected_cb, subscribed_cb, unsubscribed_cb, published_cb, data_cb])
+mqtt = network.mqtt("loboris", "mqtt.m5stack.com", connected_cb=conncb, disconnected_cb=disconncb, subscribed_cb=subscb, published_cb=pubcb, data_cb=datacb)
+
+# secure connection requires more memory and may not work
+# mqtts = network.mqtt("eclipse", "iot.eclipse.org", secure=True, cleansession=True, connected_cb=conncb, disconnected_cb=disconncb, subscribed_cb=subscb, published_cb=pubcb, data_cb=datacb)
+
+
+'''
+
+# Wait until status is: (1, 'Connected')
+
+mqtt.subscribe('test')
+mqtt.publish('test', 'Hi from Micropython')
+
+'''

examples/Timer/timer_example.py

@@ -0,0 +1,22 @@
+# https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/timer
+
+import machine
+
+tcounter = 0
+
+p1 = machine.Pin(27)
+p1.init(p1.OUT)
+p1.value(1)
+
+def tcb(timer):
+    global tcounter
+    if tcounter & 1:
+        p1.value(0)
+    else:
+        p1.value(1)
+    tcounter += 1
+    if (tcounter % 10000) == 0:
+        print("[tcb] timer: {} counter: {}".format(timer.timernum(), tcounter))
+
+t1 = machine.Timer(2)
+t1.init(period=20, mode=t1.PERIODIC, callback=tcb)