diff --git a/src/ac_training_lab/picow/autotrickler-scale/lib/mqtt_as.py b/src/ac_training_lab/picow/autotrickler-scale/lib/mqtt_as.py
new file mode 100644
index 0000000..2be2cb5
--- /dev/null
+++ b/src/ac_training_lab/picow/autotrickler-scale/lib/mqtt_as.py
@@ -0,0 +1,824 @@
+# mqtt_as.py Asynchronous version of umqtt.robust
+# (C) Copyright Peter Hinch 2017-2023.
+# Released under the MIT licence.
+
+# Pyboard D support added also RP2/default
+# Various improvements contributed by Kevin Köck.
+
+import gc
+
+import usocket as socket
+import ustruct as struct
+
+gc.collect()
+import uasyncio as asyncio
+from ubinascii import hexlify
+
+gc.collect()
+from uerrno import EINPROGRESS, ETIMEDOUT
+from utime import ticks_diff, ticks_ms
+
+gc.collect()
+import network
+from machine import unique_id
+from micropython import const
+
+gc.collect()
+from sys import platform
+
+VERSION = (0, 7, 1)
+
+# Default short delay for good SynCom throughput (avoid sleep(0) with SynCom).
+_DEFAULT_MS = const(20)
+_SOCKET_POLL_DELAY = const(5)  # 100ms added greatly to publish latency
+
+# Legitimate errors while waiting on a socket. See uasyncio __init__.py open_connection().
+ESP32 = platform == "esp32"
+RP2 = platform == "rp2"
+if ESP32:
+    # https://forum.micropython.org/viewtopic.php?f=16&t=3608&p=20942#p20942
+    BUSY_ERRORS = [EINPROGRESS, ETIMEDOUT, 118, 119]  # Add in weird ESP32 errors
+elif RP2:
+    BUSY_ERRORS = [EINPROGRESS, ETIMEDOUT, -110]
+else:
+    BUSY_ERRORS = [EINPROGRESS, ETIMEDOUT]
+
+ESP8266 = platform == "esp8266"
+PYBOARD = platform == "pyboard"
+
+
+# Default "do little" coro for optional user replacement
+async def eliza(*_):  # e.g. via set_wifi_handler(coro): see test program
+    await asyncio.sleep_ms(_DEFAULT_MS)
+
+
+class MsgQueue:
+    def __init__(self, size):
+        self._q = [0 for _ in range(max(size, 4))]
+        self._size = size
+        self._wi = 0
+        self._ri = 0
+        self._evt = asyncio.Event()
+        self.discards = 0
+
+    def put(self, *v):
+        self._q[self._wi] = v
+        self._evt.set()
+        self._wi = (self._wi + 1) % self._size
+        if self._wi == self._ri:  # Would indicate empty
+            self._ri = (self._ri + 1) % self._size  # Discard a message
+            self.discards += 1
+
+    def __aiter__(self):
+        return self
+
+    async def __anext__(self):
+        if self._ri == self._wi:  # Empty
+            self._evt.clear()
+            await self._evt.wait()
+        r = self._q[self._ri]
+        self._ri = (self._ri + 1) % self._size
+        return r
+
+
+config = {
+    "client_id": hexlify(unique_id()),
+    "server": None,
+    "port": 0,
+    "user": "",
+    "password": "",
+    "keepalive": 60,
+    "ping_interval": 0,
+    "ssl": False,
+    "ssl_params": {},
+    "response_time": 10,
+    "clean_init": True,
+    "clean": True,
+    "max_repubs": 4,
+    "will": None,
+    "subs_cb": lambda *_: None,
+    "wifi_coro": eliza,
+    "connect_coro": eliza,
+    "ssid": None,
+    "wifi_pw": None,
+    "queue_len": 0,
+    "gateway": False,
+}
+
+
+class MQTTException(Exception):
+    pass
+
+
+def pid_gen():
+    pid = 0
+    while True:
+        pid = pid + 1 if pid < 65535 else 1
+        yield pid
+
+
+def qos_check(qos):
+    if not (qos == 0 or qos == 1):
+        raise ValueError("Only qos 0 and 1 are supported.")
+
+
+# MQTT_base class. Handles MQTT protocol on the basis of a good connection.
+# Exceptions from connectivity failures are handled by MQTTClient subclass.
+class MQTT_base:
+    REPUB_COUNT = 0  # TEST
+    DEBUG = False
+
+    def __init__(self, config):
+        self._events = config["queue_len"] > 0
+        # MQTT config
+        self._client_id = config["client_id"]
+        self._user = config["user"]
+        self._pswd = config["password"]
+        self._keepalive = config["keepalive"]
+        if self._keepalive >= 65536:
+            raise ValueError("invalid keepalive time")
+        self._response_time = (
+            config["response_time"] * 1000
+        )  # Repub if no PUBACK received (ms).
+        self._max_repubs = config["max_repubs"]
+        self._clean_init = config[
+            "clean_init"
+        ]  # clean_session state on first connection
+        self._clean = config["clean"]  # clean_session state on reconnect
+        will = config["will"]
+        if will is None:
+            self._lw_topic = False
+        else:
+            self._set_last_will(*will)
+        # WiFi config
+        self._ssid = config["ssid"]  # Required for ESP32 / Pyboard D. Optional ESP8266
+        self._wifi_pw = config["wifi_pw"]
+        self._ssl = config["ssl"]
+        self._ssl_params = config["ssl_params"]
+        # Callbacks and coros
+        if self._events:
+            self.up = asyncio.Event()
+            self.down = asyncio.Event()
+            self.queue = MsgQueue(config["queue_len"])
+        else:  # Callbacks
+            self._cb = config["subs_cb"]
+            self._wifi_handler = config["wifi_coro"]
+            self._connect_handler = config["connect_coro"]
+        # Network
+        self.port = config["port"]
+        if self.port == 0:
+            self.port = 8883 if self._ssl else 1883
+        self.server = config["server"]
+        if self.server is None:
+            raise ValueError("no server specified.")
+        self._sock = None
+        self._sta_if = network.WLAN(network.STA_IF)
+        self._sta_if.active(True)
+        if config["gateway"]:  # Called from gateway (hence ESP32).
+            import aioespnow  # Set up ESPNOW
+
+            while not (sta := self._sta_if).active():
+                time.sleep(0.1)
+            sta.config(pm=sta.PM_NONE)  # No power management
+            sta.active(True)
+            self._espnow = (
+                aioespnow.AIOESPNow()
+            )  # Returns AIOESPNow enhanced with async support
+            self._espnow.active(True)
+
+        self.newpid = pid_gen()
+        self.rcv_pids = set()  # PUBACK and SUBACK pids awaiting ACK response
+        self.last_rx = ticks_ms()  # Time of last communication from broker
+        self.lock = asyncio.Lock()
+
+    def _set_last_will(self, topic, msg, retain=False, qos=0):
+        qos_check(qos)
+        if not topic:
+            raise ValueError("Empty topic.")
+        self._lw_topic = topic
+        self._lw_msg = msg
+        self._lw_qos = qos
+        self._lw_retain = retain
+
+    def dprint(self, msg, *args):
+        if self.DEBUG:
+            print(msg % args)
+
+    def _timeout(self, t):
+        return ticks_diff(ticks_ms(), t) > self._response_time
+
+    async def _as_read(self, n, sock=None):  # OSError caught by superclass
+        if sock is None:
+            sock = self._sock
+        # Declare a byte array of size n. That space is needed anyway, better
+        # to just 'allocate' it in one go instead of appending to an
+        # existing object, this prevents reallocation and fragmentation.
+        data = bytearray(n)
+        buffer = memoryview(data)
+        size = 0
+        t = ticks_ms()
+        while size < n:
+            if self._timeout(t) or not self.isconnected():
+                raise OSError(-1, "Timeout on socket read")
+            try:
+                msg_size = sock.readinto(buffer[size:], n - size)
+            except OSError as e:  # ESP32 issues weird 119 errors here
+                msg_size = None
+                if e.args[0] not in BUSY_ERRORS:
+                    raise
+            if msg_size == 0:  # Connection closed by host
+                raise OSError(-1, "Connection closed by host")
+            if msg_size is not None:  # data received
+                size += msg_size
+                t = ticks_ms()
+                self.last_rx = ticks_ms()
+            await asyncio.sleep_ms(_SOCKET_POLL_DELAY)
+        return data
+
+    async def _as_write(self, bytes_wr, length=0, sock=None):
+        if sock is None:
+            sock = self._sock
+
+        # Wrap bytes in memoryview to avoid copying during slicing
+        bytes_wr = memoryview(bytes_wr)
+        if length:
+            bytes_wr = bytes_wr[:length]
+        t = ticks_ms()
+        while bytes_wr:
+            if self._timeout(t) or not self.isconnected():
+                raise OSError(-1, "Timeout on socket write")
+            try:
+                n = sock.write(bytes_wr)
+            except OSError as e:  # ESP32 issues weird 119 errors here
+                n = 0
+                if e.args[0] not in BUSY_ERRORS:
+                    raise
+            if n:
+                t = ticks_ms()
+                bytes_wr = bytes_wr[n:]
+            await asyncio.sleep_ms(_SOCKET_POLL_DELAY)
+
+    async def _send_str(self, s):
+        await self._as_write(struct.pack("!H", len(s)))
+        await self._as_write(s)
+
+    async def _recv_len(self):
+        n = 0
+        sh = 0
+        while 1:
+            res = await self._as_read(1)
+            b = res[0]
+            n |= (b & 0x7F) << sh
+            if not b & 0x80:
+                return n
+            sh += 7
+
+    async def _connect(self, clean):
+        self._sock = socket.socket()
+        self._sock.setblocking(False)
+        try:
+            self._sock.connect(self._addr)
+        except OSError as e:
+            if e.args[0] not in BUSY_ERRORS:
+                raise
+        await asyncio.sleep_ms(_DEFAULT_MS)
+        self.dprint("Connecting to broker.")
+        if self._ssl:
+            import ssl
+
+            self._sock = ssl.wrap_socket(self._sock, **self._ssl_params)
+        premsg = bytearray(b"\x10\0\0\0\0\0")
+        msg = bytearray(b"\x04MQTT\x04\0\0\0")  # Protocol 3.1.1
+
+        sz = 10 + 2 + len(self._client_id)
+        msg[6] = clean << 1
+        if self._user:
+            sz += 2 + len(self._user) + 2 + len(self._pswd)
+            msg[6] |= 0xC0
+        if self._keepalive:
+            msg[7] |= self._keepalive >> 8
+            msg[8] |= self._keepalive & 0x00FF
+        if self._lw_topic:
+            sz += 2 + len(self._lw_topic) + 2 + len(self._lw_msg)
+            msg[6] |= 0x4 | (self._lw_qos & 0x1) << 3 | (self._lw_qos & 0x2) << 3
+            msg[6] |= self._lw_retain << 5
+
+        i = 1
+        while sz > 0x7F:
+            premsg[i] = (sz & 0x7F) | 0x80
+            sz >>= 7
+            i += 1
+        premsg[i] = sz
+        await self._as_write(premsg, i + 2)
+        await self._as_write(msg)
+        await self._send_str(self._client_id)
+        if self._lw_topic:
+            await self._send_str(self._lw_topic)
+            await self._send_str(self._lw_msg)
+        if self._user:
+            await self._send_str(self._user)
+            await self._send_str(self._pswd)
+        # Await CONNACK
+        # read causes ECONNABORTED if broker is out; triggers a reconnect.
+        resp = await self._as_read(4)
+        self.dprint("Connected to broker.")  # Got CONNACK
+        if (
+            resp[3] != 0 or resp[0] != 0x20 or resp[1] != 0x02
+        ):  # Bad CONNACK e.g. authentication fail.
+            raise OSError(
+                -1,
+                f"Connect fail: 0x{(resp[0] << 8) + resp[1]:04x} {resp[3]} (README 7)",
+            )
+
+    async def _ping(self):
+        async with self.lock:
+            await self._as_write(b"\xc0\0")
+
+    # Check internet connectivity by sending DNS lookup to Google's 8.8.8.8
+    async def wan_ok(
+        self,
+        packet=b"$\x1a\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03www\x06google\x03com\x00\x00\x01\x00\x01",
+    ):
+        if not self.isconnected():  # WiFi is down
+            return False
+        length = 32  # DNS query and response packet size
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        s.setblocking(False)
+        s.connect(("8.8.8.8", 53))
+        await asyncio.sleep(1)
+        try:
+            await self._as_write(packet, sock=s)
+            await asyncio.sleep(2)
+            res = await self._as_read(length, s)
+            if len(res) == length:
+                return True  # DNS response size OK
+        except OSError:  # Timeout on read: no connectivity.
+            return False
+        finally:
+            s.close()
+        return False
+
+    async def broker_up(self):  # Test broker connectivity
+        if not self.isconnected():
+            return False
+        tlast = self.last_rx
+        if ticks_diff(ticks_ms(), tlast) < 1000:
+            return True
+        try:
+            await self._ping()
+        except OSError:
+            return False
+        t = ticks_ms()
+        while not self._timeout(t):
+            await asyncio.sleep_ms(100)
+            if ticks_diff(self.last_rx, tlast) > 0:  # Response received
+                return True
+        return False
+
+    async def disconnect(self):
+        if self._sock is not None:
+            await self._kill_tasks(False)  # Keep socket open
+            try:
+                async with self.lock:
+                    self._sock.write(b"\xe0\0")  # Close broker connection
+                    await asyncio.sleep_ms(100)
+            except OSError:
+                pass
+            self._close()
+        self._has_connected = False
+
+    def _close(self):
+        if self._sock is not None:
+            self._sock.close()
+
+    def close(
+        self,
+    ):  # API. See https://github.com/peterhinch/micropython-mqtt/issues/60
+        self._close()
+        try:
+            self._sta_if.disconnect()  # Disconnect Wi-Fi to avoid errors
+        except OSError:
+            self.dprint("Wi-Fi not started, unable to disconnect interface")
+        self._sta_if.active(False)
+
+    async def _await_pid(self, pid):
+        t = ticks_ms()
+        while pid in self.rcv_pids:  # local copy
+            if self._timeout(t) or not self.isconnected():
+                break  # Must repub or bail out
+            await asyncio.sleep_ms(100)
+        else:
+            return True  # PID received. All done.
+        return False
+
+    # qos == 1: coro blocks until wait_msg gets correct PID.
+    # If WiFi fails completely subclass re-publishes with new PID.
+    async def publish(self, topic, msg, retain, qos):
+        pid = next(self.newpid)
+        if qos:
+            self.rcv_pids.add(pid)
+        async with self.lock:
+            await self._publish(topic, msg, retain, qos, 0, pid)
+        if qos == 0:
+            return
+
+        count = 0
+        while 1:  # Await PUBACK, republish on timeout
+            if await self._await_pid(pid):
+                return
+            # No match
+            if count >= self._max_repubs or not self.isconnected():
+                raise OSError(-1)  # Subclass to re-publish with new PID
+            async with self.lock:
+                await self._publish(topic, msg, retain, qos, dup=1, pid=pid)  # Add pid
+            count += 1
+            self.REPUB_COUNT += 1
+
+    async def _publish(self, topic, msg, retain, qos, dup, pid):
+        pkt = bytearray(b"\x30\0\0\0")
+        pkt[0] |= qos << 1 | retain | dup << 3
+        sz = 2 + len(topic) + len(msg)
+        if qos > 0:
+            sz += 2
+        if sz >= 2097152:
+            raise MQTTException("Strings too long.")
+        i = 1
+        while sz > 0x7F:
+            pkt[i] = (sz & 0x7F) | 0x80
+            sz >>= 7
+            i += 1
+        pkt[i] = sz
+        await self._as_write(pkt, i + 1)
+        await self._send_str(topic)
+        if qos > 0:
+            struct.pack_into("!H", pkt, 0, pid)
+            await self._as_write(pkt, 2)
+        await self._as_write(msg)
+
+    # Can raise OSError if WiFi fails. Subclass traps.
+    async def subscribe(self, topic, qos):
+        pkt = bytearray(b"\x82\0\0\0")
+        pid = next(self.newpid)
+        self.rcv_pids.add(pid)
+        struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic) + 1, pid)
+        async with self.lock:
+            await self._as_write(pkt)
+            await self._send_str(topic)
+            await self._as_write(qos.to_bytes(1, "little"))
+
+        if not await self._await_pid(pid):
+            raise OSError(-1)
+
+    # Can raise OSError if WiFi fails. Subclass traps.
+    async def unsubscribe(self, topic):
+        pkt = bytearray(b"\xa2\0\0\0")
+        pid = next(self.newpid)
+        self.rcv_pids.add(pid)
+        struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic), pid)
+        async with self.lock:
+            await self._as_write(pkt)
+            await self._send_str(topic)
+
+        if not await self._await_pid(pid):
+            raise OSError(-1)
+
+    # Wait for a single incoming MQTT message and process it.
+    # Subscribed messages are delivered to a callback previously
+    # set by .setup() method. Other (internal) MQTT
+    # messages processed internally.
+    # Immediate return if no data available. Called from ._handle_msg().
+    async def wait_msg(self):
+        try:
+            res = self._sock.read(1)  # Throws OSError on WiFi fail
+        except OSError as e:
+            if e.args[0] in BUSY_ERRORS:  # Needed by RP2
+                await asyncio.sleep_ms(0)
+                return
+            raise
+        if res is None:
+            return
+        if res == b"":
+            raise OSError(-1, "Empty response")
+
+        if res == b"\xd0":  # PINGRESP
+            await self._as_read(1)  # Update .last_rx time
+            return
+        op = res[0]
+
+        if op == 0x40:  # PUBACK: save pid
+            sz = await self._as_read(1)
+            if sz != b"\x02":
+                raise OSError(-1, "Invalid PUBACK packet")
+            rcv_pid = await self._as_read(2)
+            pid = rcv_pid[0] << 8 | rcv_pid[1]
+            if pid in self.rcv_pids:
+                self.rcv_pids.discard(pid)
+            else:
+                raise OSError(-1, "Invalid pid in PUBACK packet")
+
+        if op == 0x90:  # SUBACK
+            resp = await self._as_read(4)
+            if resp[3] == 0x80:
+                raise OSError(-1, "Invalid SUBACK packet")
+            pid = resp[2] | (resp[1] << 8)
+            if pid in self.rcv_pids:
+                self.rcv_pids.discard(pid)
+            else:
+                raise OSError(-1, "Invalid pid in SUBACK packet")
+
+        if op == 0xB0:  # UNSUBACK
+            resp = await self._as_read(3)
+            pid = resp[2] | (resp[1] << 8)
+            if pid in self.rcv_pids:
+                self.rcv_pids.discard(pid)
+            else:
+                raise OSError(-1)
+
+        if op & 0xF0 != 0x30:
+            return
+        sz = await self._recv_len()
+        topic_len = await self._as_read(2)
+        topic_len = (topic_len[0] << 8) | topic_len[1]
+        topic = await self._as_read(topic_len)
+        sz -= topic_len + 2
+        if op & 6:
+            pid = await self._as_read(2)
+            pid = pid[0] << 8 | pid[1]
+            sz -= 2
+        msg = await self._as_read(sz)
+        retained = op & 0x01
+        if self._events:
+            self.queue.put(topic, msg, bool(retained))
+        else:
+            self._cb(topic, msg, bool(retained))
+        if op & 6 == 2:  # qos 1
+            pkt = bytearray(b"\x40\x02\0\0")  # Send PUBACK
+            struct.pack_into("!H", pkt, 2, pid)
+            await self._as_write(pkt)
+        elif op & 6 == 4:  # qos 2 not supported
+            raise OSError(-1, "QoS 2 not supported")
+
+
+# MQTTClient class. Handles issues relating to connectivity.
+
+
+class MQTTClient(MQTT_base):
+    def __init__(self, config):
+        super().__init__(config)
+        self._isconnected = False  # Current connection state
+        keepalive = 1000 * self._keepalive  # ms
+        self._ping_interval = keepalive // 4 if keepalive else 20000
+        p_i = (
+            config["ping_interval"] * 1000
+        )  # Can specify shorter e.g. for subscribe-only
+        if p_i and p_i < self._ping_interval:
+            self._ping_interval = p_i
+        self._in_connect = False
+        self._has_connected = False  # Define 'Clean Session' value to use.
+        self._tasks = []
+        if ESP8266:
+            import esp
+
+            esp.sleep_type(
+                0
+            )  # Improve connection integrity at cost of power consumption.
+
+    async def wifi_connect(self, quick=False):
+        s = self._sta_if
+        if ESP8266:
+            if s.isconnected():  # 1st attempt, already connected.
+                return
+            s.active(True)
+            s.connect()  # ESP8266 remembers connection.
+            for _ in range(60):
+                if (
+                    s.status() != network.STAT_CONNECTING
+                ):  # Break out on fail or success. Check once per sec.
+                    break
+                await asyncio.sleep(1)
+            if (
+                s.status() == network.STAT_CONNECTING
+            ):  # might hang forever awaiting dhcp lease renewal or something else
+                s.disconnect()
+                await asyncio.sleep(1)
+            if (
+                not s.isconnected()
+                and self._ssid is not None
+                and self._wifi_pw is not None
+            ):
+                s.connect(self._ssid, self._wifi_pw)
+                while (
+                    s.status() == network.STAT_CONNECTING
+                ):  # Break out on fail or success. Check once per sec.
+                    await asyncio.sleep(1)
+        else:
+            s.active(True)
+            if RP2:  # Disable auto-sleep.
+                # https://datasheets.raspberrypi.com/picow/connecting-to-the-internet-with-pico-w.pdf
+                # para 3.6.3
+                s.config(pm=0xA11140)
+            s.connect(self._ssid, self._wifi_pw)
+            for _ in range(60):  # Break out on fail or success. Check once per sec.
+                await asyncio.sleep(1)
+                # Loop while connecting or no IP
+                if s.isconnected():
+                    break
+                if ESP32:
+                    if s.status() != network.STAT_CONNECTING:  # 1001
+                        break
+                elif PYBOARD:  # No symbolic constants in network
+                    if not 1 <= s.status() <= 2:
+                        break
+                elif RP2:  # 1 is STAT_CONNECTING. 2 reported by user (No IP?)
+                    if not 1 <= s.status() <= 2:
+                        break
+            else:  # Timeout: still in connecting state
+                s.disconnect()
+                await asyncio.sleep(1)
+
+        if not s.isconnected():  # Timed out
+            raise OSError("Wi-Fi connect timed out")
+        if not quick:  # Skip on first connection only if power saving
+            # Ensure connection stays up for a few secs.
+            self.dprint("Checking WiFi integrity.")
+            for _ in range(5):
+                if not s.isconnected():
+                    raise OSError("Connection Unstable")  # in 1st 5 secs
+                await asyncio.sleep(1)
+            self.dprint("Got reliable connection")
+
+    async def connect(
+        self, *, quick=False
+    ):  # Quick initial connect option for battery apps
+        if not self._has_connected:
+            await self.wifi_connect(quick)  # On 1st call, caller handles error
+            # Note this blocks if DNS lookup occurs. Do it once to prevent
+            # blocking during later internet outage:
+            self._addr = socket.getaddrinfo(self.server, self.port)[0][-1]
+        self._in_connect = True  # Disable low level ._isconnected check
+        try:
+            if not self._has_connected and self._clean_init and not self._clean:
+                # Power up. Clear previous session data but subsequently save it.
+                # Issue #40
+                await self._connect(True)  # Connect with clean session
+                try:
+                    async with self.lock:
+                        self._sock.write(
+                            b"\xe0\0"
+                        )  # Force disconnect but keep socket open
+                except OSError:
+                    pass
+                self.dprint("Waiting for disconnect")
+                await asyncio.sleep(2)  # Wait for broker to disconnect
+                self.dprint("About to reconnect with unclean session.")
+            await self._connect(self._clean)
+        except Exception:
+            self._close()
+            self._in_connect = False  # Caller may run .isconnected()
+            raise
+        self.rcv_pids.clear()
+        # If we get here without error broker/LAN must be up.
+        self._isconnected = True
+        self._in_connect = False  # Low level code can now check connectivity.
+        if not self._events:
+            asyncio.create_task(self._wifi_handler(True))  # User handler.
+        if not self._has_connected:
+            self._has_connected = True  # Use normal clean flag on reconnect.
+            asyncio.create_task(self._keep_connected())
+            # Runs forever unless user issues .disconnect()
+
+        asyncio.create_task(self._handle_msg())  # Task quits on connection fail.
+        self._tasks.append(asyncio.create_task(self._keep_alive()))
+        if self.DEBUG:
+            self._tasks.append(asyncio.create_task(self._memory()))
+        if self._events:
+            self.up.set()  # Connectivity is up
+        else:
+            asyncio.create_task(self._connect_handler(self))  # User handler.
+
+    # Launched by .connect(). Runs until connectivity fails. Checks for and
+    # handles incoming messages.
+    async def _handle_msg(self):
+        try:
+            while self.isconnected():
+                async with self.lock:
+                    await self.wait_msg()  # Immediate return if no message
+                await asyncio.sleep_ms(_DEFAULT_MS)  # Let other tasks get lock
+
+        except OSError:
+            pass
+        self._reconnect()  # Broker or WiFi fail.
+
+    # Keep broker alive MQTT spec 3.1.2.10 Keep Alive.
+    # Runs until ping failure or no response in keepalive period.
+    async def _keep_alive(self):
+        while self.isconnected():
+            pings_due = ticks_diff(ticks_ms(), self.last_rx) // self._ping_interval
+            if pings_due >= 4:
+                self.dprint("Reconnect: broker fail.")
+                break
+            await asyncio.sleep_ms(self._ping_interval)
+            try:
+                await self._ping()
+            except OSError:
+                break
+        self._reconnect()  # Broker or WiFi fail.
+
+    async def _kill_tasks(self, kill_skt):  # Cancel running tasks
+        for task in self._tasks:
+            task.cancel()
+        self._tasks.clear()
+        await asyncio.sleep_ms(0)  # Ensure cancellation complete
+        if kill_skt:  # Close socket
+            self._close()
+
+    # DEBUG: show RAM messages.
+    async def _memory(self):
+        while True:
+            await asyncio.sleep(20)
+            gc.collect()
+            self.dprint("RAM free %d alloc %d", gc.mem_free(), gc.mem_alloc())
+
+    def isconnected(self):
+        if self._in_connect:  # Disable low-level check during .connect()
+            return True
+        if self._isconnected and not self._sta_if.isconnected():  # It's going down.
+            self._reconnect()
+        return self._isconnected
+
+    def _reconnect(self):  # Schedule a reconnection if not underway.
+        if self._isconnected:
+            self._isconnected = False
+            asyncio.create_task(self._kill_tasks(True))  # Shut down tasks and socket
+            if self._events:  # Signal an outage
+                self.down.set()
+            else:
+                asyncio.create_task(self._wifi_handler(False))  # User handler.
+
+    # Await broker connection.
+    async def _connection(self):
+        while not self._isconnected:
+            await asyncio.sleep(1)
+
+    # Scheduled on 1st successful connection. Runs forever maintaining wifi and
+    # broker connection. Must handle conditions at edge of WiFi range.
+    async def _keep_connected(self):
+        while self._has_connected:
+            if self.isconnected():  # Pause for 1 second
+                await asyncio.sleep(1)
+                gc.collect()
+            else:  # Link is down, socket is closed, tasks are killed
+                try:
+                    self._sta_if.disconnect()
+                except OSError:
+                    self.dprint("Wi-Fi not started, unable to disconnect interface")
+                await asyncio.sleep(1)
+                try:
+                    await self.wifi_connect()
+                except OSError:
+                    continue
+                if (
+                    not self._has_connected
+                ):  # User has issued the terminal .disconnect()
+                    self.dprint("Disconnected, exiting _keep_connected")
+                    break
+                try:
+                    await self.connect()
+                    # Now has set ._isconnected and scheduled _connect_handler().
+                    self.dprint("Reconnect OK!")
+                except OSError as e:
+                    self.dprint("Error in reconnect. %s", e)
+                    # Can get ECONNABORTED or -1. The latter signifies no or bad CONNACK received.
+                    self._close()  # Disconnect and try again.
+                    self._in_connect = False
+                    self._isconnected = False
+        self.dprint("Disconnected, exited _keep_connected")
+
+    async def subscribe(self, topic, qos=0):
+        qos_check(qos)
+        while 1:
+            await self._connection()
+            try:
+                return await super().subscribe(topic, qos)
+            except OSError:
+                pass
+            self._reconnect()  # Broker or WiFi fail.
+
+    async def unsubscribe(self, topic):
+        while 1:
+            await self._connection()
+            try:
+                return await super().unsubscribe(topic)
+            except OSError:
+                pass
+            self._reconnect()  # Broker or WiFi fail.
+
+    async def publish(self, topic, msg, retain=False, qos=0):
+        qos_check(qos)
+        while 1:
+            await self._connection()
+            try:
+                return await super().publish(topic, msg, retain, qos)
+            except OSError:
+                pass
+            self._reconnect()  # Broker or WiFi fail.
diff --git a/src/ac_training_lab/picow/autotrickler-scale/lib/netman.py b/src/ac_training_lab/picow/autotrickler-scale/lib/netman.py
new file mode 100644
index 0000000..8f1250d
--- /dev/null
+++ b/src/ac_training_lab/picow/autotrickler-scale/lib/netman.py
@@ -0,0 +1,72 @@
+#              .';:cc;.
+#            .,',;lol::c.
+#            ;';lddddlclo
+#            lcloxxoddodxdool:,.
+#            cxdddxdodxdkOkkkkkkkd:.
+#          .ldxkkOOOOkkOO000Okkxkkkkx:.
+#        .lddxkkOkOOO0OOO0000Okxxxxkkkk:
+#       'ooddkkkxxkO0000KK00Okxdoodxkkkko
+#      .ooodxkkxxxOO000kkkO0KOxolooxkkxxkl
+#      lolodxkkxxkOx,.      .lkdolodkkxxxO.
+#      doloodxkkkOk           ....   .,cxO;
+#      ddoodddxkkkk:         ,oxxxkOdc'..o'
+#      :kdddxxxxd,  ,lolccldxxxkkOOOkkkko,
+#       lOkxkkk;  :xkkkkkkkkOOO000OOkkOOk.
+#        ;00Ok' 'O000OO0000000000OOOO0Od.
+#         .l0l.;OOO000000OOOOOO000000x,
+#            .'OKKKK00000000000000kc.
+#               .:ox0KKKKKKK0kdc,.
+#                      ...
+#
+# Author: peppe8o
+# Date: Jul 24th, 2022
+# Version: 1.0
+# https://peppe8o.com
+
+# modified by @sgbaird from source:
+# https://peppe8o.com/getting-started-with-wifi-on-raspberry-pi-pico-w-and-micropython/
+
+import time
+
+import network
+import rp2
+from ubinascii import hexlify
+
+
+def connectWiFi(ssid, password, country=None, wifi_energy_saver=False, retries=3):
+    for _ in range(retries):
+        try:
+            if country is not None:
+                # https://www.google.com/search?q=wifi+country+codes
+                rp2.country(country)
+            wlan = network.WLAN(network.STA_IF)
+            if not wifi_energy_saver:
+                wlan.config(pm=0xA11140)  # avoid the energy-saving WiFi mode
+            wlan.active(True)
+
+            mac = hexlify(network.WLAN().config("mac"), ":").decode()
+            print(f"MAC address: {mac}")
+
+            wlan.connect(ssid, password)
+            # Wait for connect or fail
+            max_wait = 10
+            while max_wait > 0:
+                if wlan.status() < 0 or wlan.status() >= 3:
+                    break
+                max_wait -= 1
+                print("waiting for connection...")
+                time.sleep(1)
+
+            # Handle connection error
+            if wlan.status() != 3:
+                raise RuntimeError("network connection failed")
+            else:
+                print("connected")
+                status = wlan.ifconfig()
+                print("ip = " + status[0])
+            return status
+        except RuntimeError as e:
+            print(f"Attempt failed with error: {e}. Retrying...")
+    raise RuntimeError(
+        "All attempts to connect to the network failed. Ensure you are using a 2.4 GHz WiFi network with WPA-2 authentication. See the additional prerequisites section from https://doi.org/10.1016/j.xpro.2023.102329 or the https://github.com/sparks-baird/self-driving-lab-demo/issues/76 for additional troubleshooting help."
+    )
diff --git a/src/ac_training_lab/picow/autotrickler-scale/main.py b/src/ac_training_lab/picow/autotrickler-scale/main.py
new file mode 100644
index 0000000..a9590a9
--- /dev/null
+++ b/src/ac_training_lab/picow/autotrickler-scale/main.py
@@ -0,0 +1,153 @@
+import asyncio
+import json
+import ssl
+from collections import OrderedDict
+
+import machine
+import ntptime
+import utime
+from machine import unique_id
+from mqtt_as import MQTTClient, config
+from my_secrets import HIVEMQ_HOST, HIVEMQ_PASSWORD, HIVEMQ_USERNAME, PASSWORD, SSID
+from netman import connectWiFi
+from ubinascii import hexlify
+
+# Set timezone offset; adjust as needed for daylight savings time changes
+TIMEZONE_OFFSET = -5
+
+
+def sync_time():
+    """Synchronize time with NTP server."""
+    try:
+        ntptime.timeout = 10  # Shorter timeout for faster response
+        ntptime.settime()
+        return True
+    except Exception as e:
+        print(f"NTP sync error: {e}")
+        return False
+
+
+def get_local_time():
+    """Get the current time adjusted for timezone."""
+    return utime.localtime(utime.time() + TIMEZONE_OFFSET * 3600)
+
+
+# Connect to Wi-Fi
+connectWiFi(SSID, PASSWORD)
+
+# Unique Pico W ID
+my_id = hexlify(unique_id()).decode()
+
+# MQTT topic
+# Current scale model/pico id = FX-120i/e6613008e3659f2f
+mqtt_topic = f"FX-120i/{my_id}"
+
+
+# Initial NTP sync
+if not sync_time():
+    print("Initial time sync failed, resetting...")
+    machine.reset()
+
+# Obtain CA certificate
+try:
+    with open("hivemq-com-chain.der", "rb") as f:
+        cacert = f.read()
+except Exception as e:
+    print(f"Certificate read error: {e}")
+    machine.reset()
+
+# Local configuration for MQTT
+config.update(
+    {
+        "ssid": SSID,
+        "wifi_pw": PASSWORD,
+        "server": HIVEMQ_HOST,
+        "user": HIVEMQ_USERNAME,
+        "password": HIVEMQ_PASSWORD,
+        "ssl": True,
+        "ssl_params": {
+            "cert_reqs": ssl.CERT_REQUIRED,
+            "cadata": cacert,
+            "server_hostname": HIVEMQ_HOST,
+        },
+        "keepalive": 60,
+        "ping_interval": 5,
+    }
+)
+
+# Initialize UART for scale data
+uart = machine.UART(1, baudrate=9600, tx=machine.Pin(4), rx=machine.Pin(5))
+
+
+async def read_scale_data(client):
+    last_publish = utime.time()  # Track the last time data was published
+    sync_interval = 3600  # Sync every hour
+
+    while True:
+        try:
+            # Periodic time sync
+            if utime.time() - last_publish >= sync_interval:
+                sync_time()
+
+            uart.write(b"Q\r\n")  # Command to read data from the scale
+            utime.sleep(0.1)
+
+            if uart.any():  # Check if there is data available from the scale
+                scale_data = uart.read().decode("utf-8").strip()
+                if scale_data:
+                    weight = scale_data.splitlines()[0].strip()
+                    # Remove "ST," or "US," prefixes if they exist in the data
+                    weight = weight.replace("ST,", "").replace("US,", "").strip()
+                else:
+                    weight = "0g"
+
+                current = get_local_time()
+                current_date = f"{current[0]:04}-{current[1]:02}-{current[2]:02}"
+                current_time = f"{current[3]:02}:{current[4]:02}:{current[5]:02}"
+                data = OrderedDict(
+                    [
+                        ("Current Weight", weight),
+                        ("Date", current_date),
+                        ("Time", current_time),
+                    ]
+                )
+
+                message = json.dumps(data)
+                print(f"Publishing scale data: {message}")
+                await client.publish(mqtt_topic, message, qos=1)  # Publish data
+                last_publish = utime.time()  # Update the last publish time
+
+            await asyncio.sleep(1)
+
+            # Reset if no successful publish for 5 minutes
+            if utime.time() - last_publish > 300:
+                print("No successful publish for 5 minutes, resetting...")
+                sync_time()
+                machine.reset()
+
+        except Exception as e:
+            print(f"Error in read_scale_data: {e}")
+            await asyncio.sleep(5)
+
+
+async def messages(client):
+    async for topic, msg, retained in client.queue:
+        print(f"Received message on topic {topic}: {msg.decode()}")
+
+
+async def main(client):
+    try:
+        await client.connect()
+        await asyncio.gather(messages(client), read_scale_data(client))
+    except Exception as e:
+        print(f"Main loop error: {e}")
+        machine.reset()
+
+
+# MQTT configuration
+config["queue_len"] = 2
+MQTTClient.DEBUG = True
+client = MQTTClient(config)
+
+# Start the main loop
+asyncio.run(main(client))
diff --git a/src/ac_training_lab/picow/mass-balance/us-solid/_scripts/main.py b/src/ac_training_lab/picow/mass-balance/us-solid/_scripts/main.py
new file mode 100644
index 0000000..6d716f0
--- /dev/null
+++ b/src/ac_training_lab/picow/mass-balance/us-solid/_scripts/main.py
@@ -0,0 +1,150 @@
+import asyncio
+import json
+import ssl
+from collections import OrderedDict
+
+import machine
+import ntptime
+import utime
+from machine import unique_id
+from mqtt_as import MQTTClient, config
+from my_secrets import HIVEMQ_HOST, HIVEMQ_PASSWORD, HIVEMQ_USERNAME, PASSWORD, SSID
+from netman import connectWiFi
+from ubinascii import hexlify
+
+# Set timezone offset; adjust as needed for daylight savings time changes
+TIMEZONE_OFFSET = -5
+
+
+def sync_time():
+    """Synchronize time with NTP server."""
+    try:
+        ntptime.timeout = 10  # Shorter timeout for faster response
+        ntptime.settime()
+        return True
+    except Exception as e:
+        print(f"NTP sync error: {e}")
+        return False
+
+
+def get_local_time():
+    """Get the current time adjusted for timezone."""
+    return utime.localtime(utime.time() + TIMEZONE_OFFSET * 3600)
+
+
+# Connect to Wi-Fi
+connectWiFi(SSID, PASSWORD)
+
+# Unique Pico W ID
+my_id = hexlify(unique_id()).decode()
+
+# MQTT topic
+# Current scale model/pico id = USS-DBS51-30/e6632c8593690c30
+mqtt_topic = f"USS-DBS51-30/{my_id}"
+
+
+# Initial NTP sync
+if not sync_time():
+    print("Initial time sync failed, resetting...")
+    machine.reset()
+
+# Obtain CA certificate
+try:
+    with open("hivemq-com-chain.der", "rb") as f:
+        cacert = f.read()
+except Exception as e:
+    print(f"Certificate read error: {e}")
+    machine.reset()
+
+# Local configuration for MQTT
+config.update(
+    {
+        "ssid": SSID,
+        "wifi_pw": PASSWORD,
+        "server": HIVEMQ_HOST,
+        "user": HIVEMQ_USERNAME,
+        "password": HIVEMQ_PASSWORD,
+        "ssl": True,
+        "ssl_params": {
+            "cert_reqs": ssl.CERT_REQUIRED,
+            "cadata": cacert,
+            "server_hostname": HIVEMQ_HOST,
+        },
+        "keepalive": 60,
+        "ping_interval": 5,
+    }
+)
+
+# Initialize UART for scale data
+uart = machine.UART(1, baudrate=9600, tx=machine.Pin(4), rx=machine.Pin(5))
+
+
+async def read_scale_data(client):
+    last_publish = utime.time()  # Track the last time data was published
+    sync_interval = 3600  # Sync every hour
+
+    while True:
+        try:
+            # Periodic time sync
+            if utime.time() - last_publish >= sync_interval:
+                sync_time()
+
+            uart.write(b"Q\r\n")  # Command to read data from the scale
+            utime.sleep(0.1)
+
+            if uart.any():  # Check if there is data available from the scale
+                scale_data = uart.read().decode("utf-8").strip()
+                if scale_data:
+                    weight = scale_data.splitlines()[0].strip()
+                else:
+                    weight = "0g"
+                current = get_local_time()
+                current_date = f"{current[0]:04}-{current[1]:02}-{current[2]:02}"
+                current_time = f"{current[3]:02}:{current[4]:02}:{current[5]:02}"
+                data = OrderedDict(
+                    [
+                        ("Current Weight", weight),
+                        ("Date", current_date),
+                        ("Time", current_time),
+                    ]
+                )
+
+                message = json.dumps(data)
+                print(f"Publishing scale data: {message}")
+                await client.publish(mqtt_topic, message, qos=1)  # Publish data
+                last_publish = utime.time()  # Update the last publish time
+
+            await asyncio.sleep(1)
+
+            # Reset if no successful publish for 5 minutes
+            if utime.time() - last_publish > 300:
+                print("No successful publish for 5 minutes, resetting...")
+                sync_time()
+                machine.reset()
+
+        except Exception as e:
+            print(f"Error in read_scale_data: {e}")
+            await asyncio.sleep(5)
+
+
+async def messages(client):
+    async for topic, msg, retained in client.queue:
+        print(f"Received message on topic {topic}: {msg.decode()}")
+
+
+async def main(client):
+    try:
+        await client.connect()
+        await asyncio.gather(messages(client), read_scale_data(client))
+    except Exception as e:
+        print(f"Main loop error: {e}")
+        machine.reset()
+
+
+# MQTT configuration
+config["queue_len"] = 2
+MQTTClient.DEBUG = True
+client = MQTTClient(config)
+
+# Start the main loop
+asyncio.run(main(client))