Переделана логика обмена (пк=мастер, коды команд); Rewrite скрипта и прошивки

communication.py

+import serial
+import time
+
+def open_serial(port, baudrate):
+    try: #пытаемся открыть serial порт
+        serial_port = serial.Serial(
+            port = port,
+            baudrate = baudrate,
+            bytesize = 8,
+            parity = serial.PARITY_NONE,
+            stopbits = serial.STOPBITS_ONE
+        )
+    except OSError:
+        return None
+
+    print('Delay before starting serial...')
+    time.sleep(2)
+    serial_port.reset_input_buffer()
+    serial_port.reset_output_buffer()
+    return serial_port
+
+
+
+def serial_exchange(serial_port, transmit_bytes, required_response_length, timeout = 1):
+    if serial_port is None:
+        raise OSError
+
+    serial_port.reset_input_buffer()
+    serial_port.reset_output_buffer()
+    serial_port.write(bytearray(transmit_bytes))
+
+    if required_response_length == 0:
+        return bytes([])
+
+    #ждем ответ
+    steps = 10
+    for i in range(steps):
+        if serial_port.in_waiting >= required_response_length: break
+        time.sleep(timeout / steps)
+
+    if serial_port.in_waiting < required_response_length:
+        return None
+
+    response = serial_port.read(required_response_length)
+    return response

config.json

+{
+    "device": "/dev/ttyUSB0",
+    "baudrate": 19200,
+    "pollIntervalSec": 2,
+    "arduinoTimeoutSec": 0.25,
+    "controlGroups":
+    [
+        {
+            "targetTemperature": 35,
+            "copyFromGroupIndex": 255
+        },
+        {
+            "targetTemperature": 40,
+            "copyFromGroupIndex": 255
+        },
+        {
+            "targetTemperature": 45,
+            "copyFromGroupIndex": 255
+        }
+
+    ]
+}
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general.py

+import subprocess
+import time
+import serial
+import argparse
+from argparse import RawTextHelpFormatter
+import datetime
+import threading
+from threading import Event
+import json
+
+
+class pc_command_codes:
+    initialize = 1
+    poll = 2
+
+class arduino_response_codes:
+    initialize_ok = 1
+    poll_noinit = 2
+    poll_ok = 3
+    fail = 255
+
+
+POLL_SLEEP_TIME = 0.1 #Задержка между проверками наличия запроса от ардуины (cек)
+RECONNECT_SLEEP_TIME = 1 #Задержка между попытками открыть serial порт при потере связи (cек)
+TIMEOUT_TIME = 3 #Считается что ардуина перестала отвечать, если от нее не было запросов в течение этого времени (cек)
+
+
+config = None
+
+
+
+def load_json(filename):
+    try:
+        jsonFile = open(filename, mode='r', encoding='utf-8')
+    except:
+        print(f'Failed to open {filename}')
+        return None
+
+    try:
+        config = json.load(jsonFile)
+    except:
+        print(f'Failed to read json from {filename}')
+        return None
+
+    jsonFile.close()
+
+    return config
+
+
+
+def cmdline_args_parse():
+    parser = argparse.ArgumentParser(
+        description = 'This script sends PC disk temperature via a serial port',
+        formatter_class=RawTextHelpFormatter
+    )
+
+    parser.add_argument('-m', '--manual',
+        required = False,
+        action='store_true',
+        help = 'send temperature from user input instead of hddtemp',
+    )
+
+    parser.add_argument('device',
+        type = str,
+        nargs = '?',
+        help = 'serial device to commuicate with. Example: /dev/ttyUSB0',
+        metavar = 'SERIAL'
+    )
+    parser.add_argument('speed',
+        type = int,
+        nargs = '?',
+        help = 'serial port baud rate',
+        metavar = 'SPEED'
+    )
+
+    args = parser.parse_args()
+    return args
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