first and compiling freertos

docs/examples/eth_code/Python/RP2040-ETH-Demo/RP2040-ETH-Demo.py

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+from machine import UART, Pin
+from mqtt_client import MQTTClient
+from ch9120 import CH9120
+import time
+
+# CH9120
+MODE = 1  #0:TCP Server 1:TCP Client 2:UDP Server 3:UDP Client
+GATEWAY = (192, 168, 1, 1)    # GATEWAY
+TARGET_IP = (192, 168, 1, 10) # TARGET_IP
+LOCAL_IP = (192, 168, 1, 200) # LOCAL_IP
+SUBNET_MASK = (255,255,255,0) # SUBNET_MASK
+LOCAL_PORT1 = 1000            # LOCAL_PORT1
+TARGET_PORT = 2000            # TARGET_PORT
+BAUD_RATE = 115200            # BAUD_RATE
+
+uart1 = UART(1, baudrate=9600, tx=Pin(20), rx=Pin(21))
+
+def ch9120_configure():
+    # Configure
+    global uart1 
+    ch9120 = CH9120(uart1)
+    ch9120.enter_config() # enter configuration mode
+    ch9120.set_mode(MODE)    # 0:TCP Server 1:TCP Client 2:UDP Server 3:UDP Client
+    ch9120.set_localIP(LOCAL_IP)
+    ch9120.set_subnetMask(SUBNET_MASK)
+    ch9120.set_gateway(GATEWAY)
+    ch9120.set_localPort(LOCAL_PORT1)
+    ch9120.set_targetIP(TARGET_IP)
+    ch9120.set_targetPort(TARGET_PORT)
+    ch9120.set_baudRate(BAUD_RATE)
+    ch9120.exit_config()  # exit configuration mode
+    
+    # Clear cache and reconfigure uart1
+    uart1.read(uart1.any())
+    time.sleep(0.5)
+    uart1 = UART(1, baudrate=115200, tx=Pin(20), rx=Pin(21))
+    
+if __name__ == "__main__":
+    ch9120_configure()
+    while True:
+        time.sleep(0.1)
+        while uart1.any() > 0:
+            rxData1 = uart1.read(uart1.any())
+            uart1.write(rxData1)
+            print(rxData1.decode('utf8'))

docs/examples/eth_code/Python/RP2040-ETH-Demo/ch9120.py

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+from machine import UART, Pin
+import time
+
+class CH9120:
+    def __init__(self, uart):
+        self.uart = uart
+        self.MODE = 1  #0:TCP Server 1:TCP Client 2:UDP Server 3:UDP Client
+        self.GATEWAY = (192, 168, 11, 1)    # GATEWAY
+        self.TARGET_IP = (47, 92, 129, 18)  # TARGET_IP 
+        self.LOCAL_IP = (192, 168, 10, 200) # LOCAL_IP
+        self.SUBNET_MASK = (255,255,252,0)  # SUBNET_MASK
+        self.LOCAL_PORT = 1000              # LOCAL_PORT1
+        self.TARGET_PORT = 1883             # TARGET_PORT
+        self.BAUD_RATE = 115200             # BAUD_RATE
+        self.CFG = Pin(18, Pin.OUT,Pin.PULL_UP)
+        self.RST = Pin(19, Pin.OUT,Pin.PULL_UP)
+            
+    def enter_config(self):
+        print("begin")
+        self.RST.value(1)
+        self.CFG.value(0)
+        time.sleep(0.5)
+    
+    def exit_config(self):
+        self.uart.write(b'\x57\xab\x0D')
+        time.sleep(0.1)
+        self.uart.write(b'\x57\xab\x0E')
+        time.sleep(0.1)
+        self.uart.write(b'\x57\xab\x5E')
+        time.sleep(0.1)
+        self.CFG.value(1)
+        time.sleep(0.1)
+        print("end")
+    
+    def set_mode(self,MODE):
+        self.MODE = MODE
+        self.uart.write(b'\x57\xab\x10' + self.MODE.to_bytes(1, 'little'))#Convert int to bytes
+        time.sleep(0.1)
+        
+    def set_localIP(self,LOCAL_IP):
+        self.LOCAL_IP = LOCAL_IP
+        self.uart.write(b'\x57\xab\x11' + bytes(self.LOCAL_IP))#Converts the int tuple to bytes
+        time.sleep(0.1)
+        
+    def set_subnetMask(self,SUBNET_MASK):
+        self.SUBNET_MASK = SUBNET_MASK
+        self.uart.write(b'\x57\xab\x12' + bytes(self.SUBNET_MASK))
+        time.sleep(0.1)
+        
+    def set_gateway(self,GATEWAY):
+        self.GATEWAY = GATEWAY
+        self.uart.write(b'\x57\xab\x13' + bytes(self.GATEWAY))
+        time.sleep(0.1)
+        
+    def set_localPort(self,LOCAL_PORT):
+        self.LOCAL_PORT = LOCAL_PORT
+        self.uart.write(b'\x57\xab\x14' + self.LOCAL_PORT.to_bytes(2, 'little'))
+        time.sleep(0.1)
+        
+    def set_targetIP(self,TARGET_IP):
+        self.TARGET_IP = TARGET_IP
+        self.uart.write(b'\x57\xab\x15' + bytes(self.TARGET_IP))
+        time.sleep(0.1)
+        
+    def set_targetPort(self,TARGET_PORT):
+        self.TARGET_PORT = TARGET_PORT
+        self.uart.write(b'\x57\xab\x16' + self.TARGET_PORT.to_bytes(2, 'little'))
+        time.sleep(0.1)
+        
+    def set_baudRate(self,BAUD_RATE):
+        self.BAUD_RATE = BAUD_RATE
+        self.uart.write(b'\x57\xab\x21' + self.BAUD_RATE.to_bytes(4, 'little'))
+        time.sleep(0.1)
+