Docker is now working

PC_CONTROL_CODE/docker/.env

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+baud_rate=
+serial_adapter=
+wait_time=

PC_CONTROL_CODE/docker/Dockerfile

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+FROM alpine:latest
+
+# https://docs.docker.com/reference/dockerfile/#environment-replacement
+ENV MD1200BAUD=38400
+ENV SERIALADAPTER=/dev/ttyUSB0
+ENV EPPYSLEEPY=300
+
+# VOLUME [""]
+
+RUN apk update && \
+    apk add python3 py3-pip
+
+RUN mkdir /etc/MD1200FAN/
+WORKDIR /etc/MD1200FAN/
+
+COPY ./mainDocker.py /etc/MD1200FAN/
+# COPY ./requirements.txt /etc/MD1200FAN/
+
+RUN python3 -m venv venv && \
+    venv/bin/python3 -m pip install --upgrade pip && \
+    venv/bin/pip3 install PySerial
+    # venv/bin/pip3 install -r requirements.txt 
+
+# VOLUME ["/etc/MD1200FAN/"]
+
+CMD ["venv/bin/python3", "mainDocker.py"]
+
+# CMD ["/etc/MD1200FAN/venv/bin/python3", "/etc/MD1200FAN/mainDocker.py"]

PC_CONTROL_CODE/docker/docker-compose.yml

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+---
+
+services:
+  mdfanchanger:
+    container_name: MD_Fan_Changer
+    build: ./
+    image: dm1200fanchanger:V1
+    environment:
+      - baud_rate=${baud_rate:-38400} 
+      - serial_adapter=${serial_adapter:-"/dev/ttyUSB0"} 
+      - wait_time=${wait_time:-300}
+    devices:
+      - /dev/ttyUSB0:/dev/ttyUSB0
+    restart: unless-stopped
+    privileged: false

PC_CONTROL_CODE/docker/mainDocker.py

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+import serial, time, os
+
+# CONST
+if os.environ["MD1200BAUD"]:
+    MD1200BAUD = int(os.environ["MD1200BAUD"])
+else:
+    MD1200BAUD = 38400
+
+if os.environ["SERIALADAPTER"]:
+    SERIALADAPTER = os.environ["SERIALADAPTER"]
+else:
+    SERIALADAPTER = "/dev/ttyUSB0"
+
+GETTEMP = "_temp_rd"
+SETFANPRCNT = "set_speed"
+
+if os.environ["EPPYSLEEPY"]:
+    EPPYSLEEPY = int(os.environ["EPPYSLEEPY"])
+else:
+    EPPYSLEEPY = 300  # 5 minutes
+
+# init
+MDserial = serial.Serial(
+    port=SERIALADAPTER,\
+    baudrate=MD1200BAUD,\
+    parity=serial.PARITY_NONE,\
+    stopbits=serial.STOPBITS_ONE,\
+    bytesize=serial.EIGHTBITS,\
+    timeout=1)
+
+
+
+def getTemp(inpMDreturning):
+    MDict = {}
+
+    # Sanitise output
+    MDsanit = inpMDreturning.splitlines()
+
+    #if there is smth do smth
+    if inpMDreturning:
+
+        for line in MDsanit:
+            
+            if ">" in line or "b'" in line:
+                continue
+
+            matchstm = line[2:6]
+
+            match matchstm:
+                case "BP_1":
+                    MDict["bp1"] = int(line[12:14])
+                case "BP_2":
+                    MDict["bp2"] = int(line[12:14])
+                case "SIM0":
+                    MDict["sim0"] = int(line[12:14])
+                case "SIM1":
+                    MDict["sim1"] = int(line[12:14])
+                case "EXP0":
+                    MDict["exp0"] = int(line[12:14])
+                case "EXP1":
+                    MDict["exp1"] = int(line[12:14])
+                case "AVG":
+                    MDict["avg"] = int(line[12:14])
+                case _:
+                    continue
+        return MDict
+
+
+def setSpeed(inSpeeDict: dict):
+
+    bpavrg = 0
+    # Some safe fan speedvalue
+    defoutprntg = 27
+    # default
+    outfanprcntg = 0
+
+    # Decide on fan speeds
+    LOW_FAN_TRSHD = 21
+    HIGH_FAN_TRSHD = 40
+    TEMP_FACTOR = 19
+
+    # get backplanbe average 
+    if inSpeeDict["bp1"] and inSpeeDict["bp2"]:
+        bpavrg = (inSpeeDict["bp1"] + inSpeeDict["bp2"]) /2
+
+        outfanprcntg = int((bpavrg / (HIGH_FAN_TRSHD - LOW_FAN_TRSHD)) * TEMP_FACTOR)
+
+    # Set fan speed
+    if outfanprcntg >= 20:
+        MDserial.write(("set_speed " + str(outfanprcntg) + " \n\r").encode())  
+        print(f"setting {outfanprcntg}%")
+        return 0
+    else:
+        # Set default value
+        MDserial.write(("set_speed " + str(defoutprntg) + " \n\r").encode())  
+        return 1
+    
+    # If something goes super wrong
+    return -1
+
+
+
+# Check if UART is used
+# Not neede because when defining MDserial it gets automatically opened
+# Will leave it here anyway
+# try:
+#     MDserial.open()
+# except serial.serialutil.SerialException:
+#     # MDserial.close()
+#     # MDserial.open()
+#     print("Port allready opened.\nTry closing it first")
+
+while True:
+    # https://stackoverflow.com/questions/52578122/not-able-to-send-the-enter-command-on-pyserial
+    MDserial.write("_temp_rd\n\r".encode())
+    time.sleep(1)
+    MDreturning = MDserial.read_until(" >").decode()
+
+    MDtempDict = getTemp(MDreturning)
+    setSpeedrcode = setSpeed(MDtempDict)
+
+    # good
+    if setSpeedrcode == 0:
+        # print("Were mint")
+        time.sleep(EPPYSLEEPY)
+    # not good
+    elif setSpeedrcode == 1:
+        print("Ambigous temperature readings.\nFalling back to safe values.")
+        time.sleep(EPPYSLEEPY)
+    # very not good
+    elif setSpeedrcode == -1:
+        print("o nyo")
+        exit()
+    # very very very not good
+    else:
+        print("idk")
+        exit()
+
+
+print("closing port")
+MDserial.close()