arduino · iabdalkader · Mar 15, 2024 · Mar 15, 2024
diff --git a/lib/cmwx1/cmwx1.py b/lib/cmwx1/cmwx1.py
@@ -0,0 +1,367 @@
+# This file is part of the cmwx1 module.
+#
+# Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
+# Copyright (c) 2013-2021 Sebastian Romero <s.romero@arduino.cc>
+# Copyright (c) 2021 Arduino SA
+#
+# This work is licensed under the MIT license, see the file LICENSE for details.
+#
+# CMWX1ZZABZ-093 driver for Arduino boards.
+# Note this module runs a stock or a custom Arduino firmware.
+
+from time import sleep_ms
+from time import ticks_ms
+from machine import UART
+from machine import Pin
+from micropython import const
+
+
+class LoraError(Exception):
+    pass
+
+
+class LoraErrorTimeout(LoraError):
+    pass
+
+
+class LoraErrorParam(LoraError):
+    pass
+
+
+class LoraErrorBusy(LoraError):
+    pass
+
+
+class LoraErrorOverflow(LoraError):
+    pass
+
+
+class LoraErrorNoNetwork(LoraError):
+    pass
+
+
+class LoraErrorRX(LoraError):
+    pass
+
+
+class LoraErrorUnknown(LoraError):
+    pass
+
+
+class Lora:
+    MODE_ABP = const(0)
+    MODE_OTAA = const(1)
+
+    CLASS_A = const("A")
+    CLASS_B = const("B")
+    CLASS_C = const("C")
+
+    BAND_AS923 = const(0)
+    BAND_AU915 = const(1)
+    BAND_EU868 = const(5)
+    BAND_KR920 = const(6)
+    BAND_IN865 = const(7)
+    BAND_US915 = const(8)
+    BAND_US915_HYBRID = const(9)
+
+    RF_MODE_RFO = const(0)
+    RF_MODE_PABOOST = const(1)
+
+    LoraErrors = {
+        "": LoraErrorTimeout,  # empty buffer
+        "+ERR": LoraError,
+        "+ERR_PARAM": LoraErrorParam,
+        "+ERR_BUSY": LoraErrorBusy,
+        "+ERR_PARAM_OVERFLOW": LoraErrorOverflow,
+        "+ERR_NO_NETWORK": LoraErrorNoNetwork,
+        "+ERR_RX": LoraErrorRX,
+        "+ERR_UNKNOWN": LoraErrorUnknown,
+    }
+
+    def __init__(
+        self,
+        uart=None,
+        rst_pin=None,
+        boot_pin=None,
+        band=BAND_EU868,  # noqa
+        poll_ms=300000,
+        debug=False,
+    ):
+        self.debug = debug
+        self.uart = uart
+        self.rst_pin = rst_pin
+        self.boot_pin = boot_pin
+        self.band = band
+        self.poll_ms = poll_ms
+        self.last_poll_ms = ticks_ms()
+
+        self.init_modem()
+
+        # Reset module
+        self.boot_pin.value(0)
+        self.rst_pin.value(1)
+        sleep_ms(200)
+        self.rst_pin.value(0)
+        sleep_ms(200)
+        self.rst_pin.value(1)
+
+        # Restart module
+        self.restart()
+
+    def init_modem(self):
+        # Arduino Portenta H7 Pin Configuration
+        if not self.rst_pin:
+            self.rst_pin = Pin("PC6", Pin.OUT_PP, Pin.PULL_UP, value=1)
+        if not self.boot_pin:
+            self.boot_pin = Pin("PG7", Pin.OUT_PP, Pin.PULL_DOWN, value=0)
+        if not self.uart:
+            self.uart = UART(8, 19200)
+            # self.uart = UART(1, 19200) # Use external module
+            self.uart.init(
+                19200, bits=8, parity=None, stop=2, timeout=250, timeout_char=100
+            )
+
+    def debug_print(self, data):
+        if self.debug:
+            print(data)
+
+    def is_arduino_firmware(self):
+        return "ARD-078" in self.fw_version
+
+    def configure_class(self, _class):
+        self.send_command("+CLASS=", _class)
+
+    def configure_band(self, band):
+        self.send_command("+BAND=", band)
+        if band == self.BAND_EU868 and self.is_arduino_firmware():
+            self.send_command("+DUTYCYCLE=", 1)
+        return True
+
+    def set_baudrate(self, baudrate):
+        self.send_command("+UART=", baudrate)
+
+    def set_autobaud(self, timeout=10000):
+        start = ticks_ms()
+        while (ticks_ms() - start) < timeout:
+            if self.send_command("", timeout=200, raise_error=False) == "+OK":
+                sleep_ms(200)
+                while self.uart.any():
+                    self.uart.readchar()
+                return True
+        return False
+
+    def get_fw_version(self):
+        dev = self.send_command("+DEV?")
+        fw_ver = self.send_command("+VER?")
+        return dev + " " + fw_ver
+
+    def get_device_eui(self):
+        return self.send_command("+DEVEUI?")
+
+    def factory_default(self):
+        self.send_command("+FACNEW")
+
+    def restart(self):
+        if self.set_autobaud() is False:
+            raise (LoraError("Failed to set autobaud"))
+
+        # Different delimiter as REBOOT response EVENT doesn't end with '\r'.
+        if self.send_command("+REBOOT", delimiter="+EVENT=0,0", timeout=10000) != "+EVENT=0,0":
+            raise (LoraError("Failed to reboot module"))
+        sleep_ms(1000)
+        self.fw_version = self.get_fw_version()
+        self.configure_band(self.band)
+
+    def set_rf_power(self, mode, power):
+        self.send_command("+RFPOWER=", mode, ",", power)
+
+    def set_port(self, port):
+        self.send_command("+PORT=", port)
+
+    def set_public_network(self, enable):
+        self.send_command("+NWK=", int(enable))
+
+    def sleep(self, enable):
+        self.send_command("+SLEEP=", int(enable))
+
+    def format(self, hexMode):
+        self.send_command("+DFORMAT=", int(hexMode))
+
+    def set_datarate(self, dr):
+        self.send_command("+DR=", dr)
+
+    def get_datarate(self):
+        return int(self.send_command("+DR?"))
+
+    def set_adr(self, adr):
+        self.send_command("+ADR=", int(adr))
+
+    def get_adr(self):
+        return int(self.send_command("+ADR?"))
+
+    def get_devaddr(self):
+        return self.send_command("+DEVADDR?")
+
+    def get_nwk_skey(self):
+        return self.send_command("+NWKSKEY?")
+
+    def get_appskey(self):
+        return self.send_command("+APPSKEY?")
+
+    def get_rx2dr(self):
+        return int(self.send_command("+RX2DR?"))
+
+    def set_rx2dr(self, dr):
+        self.send_command("+RX2DR=", dr)
+
+    def get_ex2freq(self):
+        return int(self.send_command("+RX2FQ?"))
+
+    def set_rx2freq(self, freq):
+        self.send_command("+RX2FQ=", freq)
+
+    def set_fcu(self, fcu):
+        self.send_command("+FCU=", fcu)
+
+    def get_fcu(self):
+        return int(self.send_command("+FCU?"))
+
+    def set_fcd(self, fcd):
+        self.send_command("+FCD=", fcd)
+
+    def get_fcd(self):
+        return int(self.send_command("+FCD?"))
+
+    def change_mode(self, mode):
+        self.send_command("+MODE=", mode)
+
+    def join(self, timeout_ms):
+        if self.send_command("+JOIN", timeout=timeout_ms) != "+ACK":
+            return False
+        response = self.receive("\r", timeout=timeout_ms)
+        return response == "+EVENT=1,1"
+
+    def get_join_status(self):
+        return int(self.send_command("+NJS?")) == 1
+
+    def get_max_size(self):
+        if self.is_arduino_firmware():
+            return 64
+        return int(self.send_command("+MSIZE?", timeout=2000))
+
+    def poll(self):
+        if (ticks_ms() - self.last_poll_ms) > self.poll_ms:
+            self.last_poll_ms = ticks_ms()
+            # Triggers a fake write
+            self.send_data("\0", True)
+
+    def send_data(self, buff, confirmed=True):
+        max_len = self.get_max_size()
+        if len(buff) > max_len:
+            raise (LoraError("Packet exceeds max length"))
+        if self.send_command("+CTX " if confirmed else "+UTX ", len(buff), data=buff) != "+OK":
+            return False
+        if confirmed:
+            response = self.receive("\r", timeout=10000)
+            return response == "+ACK"
+        return True
+
+    def receive_data(self, timeout=1000):
+        response = self.receive("\r", timeout=timeout)
+        if response.startswith("+RECV"):
+            params = response.split("=")[1].split(",")
+            port = params[0]
+            length = int(params[1])
+            dummy_data_length = 2  # Data starts with \n\n sequence
+            data = self.receive(max_bytes=length + dummy_data_length, timeout=timeout)[
+                dummy_data_length:
+            ]
+            return {"port": port, "data": data}
+
+    def receive(self, delimiter=None, max_bytes=None, timeout=1000):
+        buf = []
+        start = ticks_ms()
+        while (ticks_ms() - start) < timeout:
+            while self.uart.any():
+                buf += chr(self.uart.readchar())
+
+                if max_bytes and len(buf) == max_bytes:
+                    data = "".join(buf)
+                    self.debug_print(data)
+                    return data
+                if len(buf) and delimiter is not None:
+                    data = "".join(buf)
+                    trimmed = data[0:-1] if data[-1] == "\r" else data
+
+                    if isinstance(delimiter, str) and len(delimiter) == 1 and buf[-1] == delimiter:
+                        self.debug_print(trimmed)
+                        return trimmed
+                    if isinstance(delimiter, str) and trimmed == delimiter:
+                        self.debug_print(trimmed)
+                        return trimmed
+                    if isinstance(delimiter, list) and trimmed in delimiter:
+                        self.debug_print(trimmed)
+                        return trimmed
+
+        data = "".join(buf)
+        self.debug_print(data)
+        return data[0:-1] if len(data) != 0 and data[-1] == "\r" else data
+
+    def available(self):
+        return self.uart.any()
+
+    def join_OTAA(self, appEui, appKey, devEui=None, timeout=60000):
+        self.change_mode(self.MODE_OTAA)
+        self.send_command("+APPEUI=", appEui)
+        self.send_command("+APPKEY=", appKey)
+        if devEui:
+            self.send_command("+DEVEUI=", devEui)
+        network_joined = self.join(timeout)
+        # This delay was in MKRWAN.h
+        # delay(1000);
+        return network_joined
+
+    def join_ABP(self, nwkId, devAddr, nwkSKey, appSKey, timeout=60000):
+        self.change_mode(self.MODE_ABP)
+        # Commented in MKRWAN.h
+        # self.send_command("+IDNWK=", nwkId)
+        self.send_command("+DEVADDR=", devAddr)
+        self.send_command("+NWKSKEY=", nwkSKey)
+        self.send_command("+APPSKEY=", appSKey)
+        self.join(timeout)
+        return self.get_join_status()
+
+    def handle_error(self, command, data):
+        if not data.startswith("+ERR") and data != "":
+            return
+        if data in self.LoraErrors:
+            raise (self.LoraErrors[data]('Command "%s" has failed!' % command))
+        raise (
+            LoraError(
+                'Command: "%s" failed with unknown status: "%s"' % (command, data)
+            )
+        )
+
+    def send_command(
+        self, cmd, *args, delimiter="\r", data=None, timeout=1000, raise_error=True
+    ):
+        # Write command and args
+        uart_cmd = "AT" + cmd + "".join([str(x) for x in args]) + "\r"
+        self.debug_print(uart_cmd)
+        self.uart.write(uart_cmd)
+
+        # Attach raw data
+        if data:
+            self.debug_print(data)
+            self.uart.write(data)
+
+        # Read status and value (if any)
+        response = self.receive(delimiter, timeout=timeout)
+
+        # Error handling
+        if raise_error:
+            self.handle_error(cmd, response)
+
+        if cmd.endswith("?"):
+            return response.split("=")[1]
+        return response
diff --git a/lib/cmwx1/manifest.py b/lib/cmwx1/manifest.py
@@ -0,0 +1,6 @@
+metadata(
+    description="CMWX1ZZABZ-093 driver for Arduino boards.",
+    version="0.0.1",
+)
+
+module("cmwx1.py")