Not quite working yet, first tests

src/boot.py

@@ -0,0 +1,5 @@
+# This file is executed on every boot (including wake-boot from deepsleep)
+#import esp
+#esp.osdebug(None)
+import webrepl
+webrepl.start()

src/main.py

@@ -0,0 +1,62 @@
+import network
+from mqtt import MQTTClient 
+import machine 
+import time 
+ 
+def sub_cb(topic, msg): 
+   print(msg) 
+ 
+wlan = network.WLAN(network.STA_IF) 
+wlan.active(True)
+
+#wlan.connect("c-base-botnet", auth=(WLAN.WPA2, "wifipassword"), timeout=5000) 
+ 
+while not wlan.isconnected():  
+    machine.idle() 
+print("Connected to Wifi\n") 
+ 
+client = MQTTClient("windsensor_0", "192.168.178.98",user="", password="", port=1883) 
+#client = MQTTClient("windsensor_0", "mqtt.cbrp3.c-base.org",user="", password="", port=1883) 
+client.set_callback(sub_cb) 
+client.connect()
+client.subscribe(topic="/hackerfleet/sensors/windsensor/control") 
+
+print("Connected to MQTT")
+
+speedInterrupts = 0
+directionInterrupts = 0
+
+speedTicks = 0
+directionTicks = 0
+
+def callbackSpeed(pin):
+    global speedInterrupts
+    speedInterrupts += 1
+
+def callbackDirection(pin):
+    global directionInterrupts
+    directionInterrupts += 1
+
+speedPin = machine.Pin(25, machine.Pin.IN, machine.Pin.PULL_UP)
+directionPin = machine.Pin(26, machine.Pin.IN, machine.Pin.PULL_UP)
+
+speedPin.irq(trigger=machine.Pin.IRQ_FALLING, handler=callbackSpeed)
+directionPin.irq(trigger=machine.Pin.IRQ_FALLING, handler=callbackSpeed)
+
+print("Pin setup done")
+
+while True:
+
+    if speedInterrupts > 0 or directionInterrupts > 0:
+        state = machine.disable_irq()
+        if speedInterrupts > 0:
+            speedTicks += 1
+            speedInterrupts -= 1
+        if directionInterrupts > 0:
+            directionTicks += 1
+            directionInterrupts -= 1
+
+        machine.enable_irq(state)
+
+        print("Direction: ", str(directionTicks), " Speed: ", str(speedTicks))
+

src/mqtt.py

@@ -0,0 +1,192 @@
+import usocket as socket
+import ustruct as struct
+from ubinascii import hexlify
+
+class MQTTException(Exception):
+    pass
+
+class MQTTClient:
+
+    def __init__(self, client_id, server, port=0, user=None, password=None, keepalive=0,
+                 ssl=False, ssl_params={}):
+        if port == 0:
+            port = 8883 if ssl else 1883
+        self.client_id = client_id
+        self.sock = None
+        self.addr = socket.getaddrinfo(server, port)[0][-1]
+        self.ssl = ssl
+        self.ssl_params = ssl_params
+        self.pid = 0
+        self.cb = None
+        self.user = user
+        self.pswd = password
+        self.keepalive = keepalive
+        self.lw_topic = None
+        self.lw_msg = None
+        self.lw_qos = 0
+        self.lw_retain = False
+
+    def _send_str(self, s):
+        self.sock.write(struct.pack("!H", len(s)))
+        self.sock.write(s)
+
+    def _recv_len(self):
+        n = 0
+        sh = 0
+        while 1:
+            b = self.sock.read(1)[0]
+            n |= (b & 0x7f) << sh
+            if not b & 0x80:
+                return n
+            sh += 7
+
+    def set_callback(self, f):
+        self.cb = f
+
+    def set_last_will(self, topic, msg, retain=False, qos=0):
+        assert 0 <= qos <= 2
+        assert topic
+        self.lw_topic = topic
+        self.lw_msg = msg
+        self.lw_qos = qos
+        self.lw_retain = retain
+
+    def connect(self, clean_session=True):
+        self.sock = socket.socket()
+        self.sock.connect(self.addr)
+        if self.ssl:
+            import ussl
+            self.sock = ussl.wrap_socket(self.sock, **self.ssl_params)
+        msg = bytearray(b"\x10\0\0\x04MQTT\x04\x02\0\0")
+        msg[1] = 10 + 2 + len(self.client_id)
+        msg[9] = clean_session << 1
+        if self.user is not None:
+            msg[1] += 2 + len(self.user) + 2 + len(self.pswd)
+            msg[9] |= 0xC0
+        if self.keepalive:
+            assert self.keepalive < 65536
+            msg[10] |= self.keepalive >> 8
+            msg[11] |= self.keepalive & 0x00FF
+        if self.lw_topic:
+            msg[1] += 2 + len(self.lw_topic) + 2 + len(self.lw_msg)
+            msg[9] |= 0x4 | (self.lw_qos & 0x1) << 3 | (self.lw_qos & 0x2) << 3
+            msg[9] |= self.lw_retain << 5
+        self.sock.write(msg)
+        #print(hex(len(msg)), hexlify(msg, ":"))
+        self._send_str(self.client_id)
+        if self.lw_topic:
+            self._send_str(self.lw_topic)
+            self._send_str(self.lw_msg)
+        if self.user is not None:
+            self._send_str(self.user)
+            self._send_str(self.pswd)
+        resp = self.sock.read(4)
+        assert resp[0] == 0x20 and resp[1] == 0x02
+        if resp[3] != 0:
+            raise MQTTException(resp[3])
+        return resp[2] & 1
+
+    def disconnect(self):
+        self.sock.write(b"\xe0\0")
+        self.sock.close()
+
+    def ping(self):
+        self.sock.write(b"\xc0\0")
+
+    def publish(self, topic, msg, retain=False, qos=0):
+        pkt = bytearray(b"\x30\0\0\0")
+        pkt[0] |= qos << 1 | retain
+        sz = 2 + len(topic) + len(msg)
+        if qos > 0:
+            sz += 2
+        assert sz < 2097152
+        i = 1
+        while sz > 0x7f:
+            pkt[i] = (sz & 0x7f) | 0x80
+            sz >>= 7
+            i += 1
+        pkt[i] = sz
+        #print(hex(len(pkt)), hexlify(pkt, ":"))
+        self.sock.write(pkt, i + 1)
+        self._send_str(topic)
+        if qos > 0:
+            self.pid += 1
+            pid = self.pid
+            struct.pack_into("!H", pkt, 0, pid)
+            self.sock.write(pkt, 2)
+        self.sock.write(msg)
+        if qos == 1:
+            while 1:
+                op = self.wait_msg()
+                if op == 0x40:
+                    sz = self.sock.read(1)
+                    assert sz == b"\x02"
+                    rcv_pid = self.sock.read(2)
+                    rcv_pid = rcv_pid[0] << 8 | rcv_pid[1]
+                    if pid == rcv_pid:
+                        return
+        elif qos == 2:
+            assert 0
+
+    def subscribe(self, topic, qos=0):
+        assert self.cb is not None, "Subscribe callback is not set"
+        pkt = bytearray(b"\x82\0\0\0")
+        self.pid += 1
+        struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic) + 1, self.pid)
+        #print(hex(len(pkt)), hexlify(pkt, ":"))
+        self.sock.write(pkt)
+        self._send_str(topic)
+        self.sock.write(qos.to_bytes(1, "little"))
+        while 1:
+            op = self.wait_msg()
+            if op == 0x90:
+                resp = self.sock.read(4)
+                #print(resp)
+                assert resp[1] == pkt[2] and resp[2] == pkt[3]
+                if resp[3] == 0x80:
+                    raise MQTTException(resp[3])
+                return
+
+    # Wait for a single incoming MQTT message and process it.
+    # Subscribed messages are delivered to a callback previously
+    # set by .set_callback() method. Other (internal) MQTT
+    # messages processed internally.
+    def wait_msg(self):
+        res = self.sock.read(1)
+        self.sock.setblocking(True)
+        if res is None:
+            return None
+        if res == b"":
+            raise OSError(-1)
+        if res == b"\xd0":  # PINGRESP
+            sz = self.sock.read(1)[0]
+            assert sz == 0
+            return None
+        op = res[0]
+        if op & 0xf0 != 0x30:
+            return op
+        sz = self._recv_len()
+        topic_len = self.sock.read(2)
+        topic_len = (topic_len[0] << 8) | topic_len[1]
+        topic = self.sock.read(topic_len)
+        sz -= topic_len + 2
+        if op & 6:
+            pid = self.sock.read(2)
+            pid = pid[0] << 8 | pid[1]
+            sz -= 2
+        msg = self.sock.read(sz)
+        self.cb(topic, msg)
+        if op & 6 == 2:
+            pkt = bytearray(b"\x40\x02\0\0")
+            struct.pack_into("!H", pkt, 2, pid)
+            self.sock.write(pkt)
+        elif op & 6 == 4:
+            assert 0
+
+    # Checks whether a pending message from server is available.
+    # If not, returns immediately with None. Otherwise, does
+    # the same processing as wait_msg.
+    def check_msg(self):
+        self.sock.setblocking(False)
+        return self.wait_msg()
+