update socket demo

network/demo_http.py

@@ -1,14 +1,8 @@
-import usocket
-import network
-import gc
-import os
+import usocket, network, time
 import lcd, image
-import machine
 from Maix import GPIO
 from machine import UART
-from board import board_info
-from fpioa_manager import fm
-import time
+from fpioa_manager import fm, board_info
 
 
 
@@ -48,12 +42,9 @@ def wifi_reset():
         return None
     return nic
 
-wifi_enable(0)
-time.sleep(1)
-wifi_enable(1)
-time.sleep(2)
-
 nic = wifi_reset()
+if not nic:
+    raise Exception("WiFi init fail")
 
 nic.connect("Sipeed_2.4G","passwd")
 nic.ifconfig()

network/demo_mqtt.md

@@ -0,0 +1,3 @@
+
+Refer to https://github.com/micropython/micropython-lib/tree/master/umqtt.simple
+

network/demo_net_socket.py

@@ -1,35 +1,63 @@
-import socket
-import network
-import gc
-import os
+import socket, network, time
 import lcd, image
-import machine
 from Maix import GPIO
-from board import board_info
-from fpioa_manager import fm
+from machine import UART
+from fpioa_manager import fm, board_info
 
-#reset ESP8285 begin
-fm.register(8, fm.fpioa.GPIOHS0, force=True)
-wifi_en=GPIO(GPIO.GPIOHS0, GPIO.OUT)
 
 fm.register(0, fm.fpioa.GPIOHS1, force=True)
 wifi_io0_en=GPIO(GPIO.GPIOHS1, GPIO.OUT)
 wifi_io0_en.value(0)
 
-wifi_en.value(0)  ##if ESP8285 init error ,try add ## or remove ##  this line.
-time.sleep(2)
-wifi_en.value(1)
-time.sleep(5)
-#reset ESP8285 end
+fm.register(8, fm.fpioa.GPIOHS0, force=True)
+wifi_en=GPIO(GPIO.GPIOHS0,GPIO.OUT)
+fm.register(board_info.WIFI_RX,fm.fpioa.UART2_TX, force=True)
+fm.register(board_info.WIFI_TX,fm.fpioa.UART2_RX, force=True)
+
+def wifi_enable(en):
+    global wifi_en
+    wifi_en.value(en)
+
+def wifi_reset():
+    global uart
+    wifi_enable(0)
+    time.sleep_ms(200)
+    wifi_enable(1)
+    time.sleep(2)
+    uart = UART(UART.UART2,115200,timeout=1000, read_buf_len=4096)
+    tmp = uart.read()
+    uart.write("AT+UART_CUR=921600,8,1,0,0\r\n")
+    print(uart.read())
+    uart = UART(UART.UART2,921600,timeout=1000, read_buf_len=10240) # important! baudrate too low or read_buf_len too small will loose data
+    uart.write("AT\r\n")
+    tmp = uart.read()
+    print(tmp)
+    if not tmp.endswith("OK\r\n"):
+        print("reset fail")
+        return None
+    try:
+        nic = network.ESP8285(uart)
+    except Exception:
+        return None
+    return nic
+
+nic = wifi_reset()
+if not nic:
+    raise Exception("WiFi init fail")
 
-fm.register(board_info.WIFI_RX, fm.fpioa.UART2_TX, force=True)
-fm.register(board_info.WIFI_TX, fm.fpioa.UART2_RX, force=True)
-uart = machine.UART(machine.UART.UART2, 115200,timeout=1000, read_buf_len=4096)
-nic=network.ESP8285(uart)
 nic.connect("Sipeed_2.4G","passwd")
+nic.ifconfig()
 
+err = 0
 sock = socket.socket()
-addr = socket.getaddrinfo("dl.sipeed.com", 80)[0][-1]
+while 1:
+    try:
+        addr = socket.getaddrinfo("dl.sipeed.com", 80)[0][-1]
+        break
+    except Exception:
+        err += 1
+    if err > 5:
+        raise Exception("get ip failed!")
 sock.connect(addr)
 sock.send('''GET /MAIX/MaixPy/assets/Alice.jpg HTTP/1.1
 Host: dl.sipeed.com
@@ -48,17 +76,24 @@ while True:
     print("rcv:", len(data))
     img = img + data
 
-print(len(img))
+sock.close()
+
+print("rcv len:", len(img))
 begin=img.find(b"\r\n\r\n")+4
 img = img[begin:begin+43756]   ## jpg file size is 43756 byte
-print(len(img))
+if len(img) != 43756:
+    raise Exception("recv jpg not complete, try again")
+print("image len:", len(img))
+
 print("save to /flash/Alice.jpg")
 f = open("/flash/Alice.jpg","wb")
 f.write(img)
 f.close()
+del img
 print("save ok")
 print("display")
 img = image.Image("/flash/Alice.jpg")
 lcd.init()
 lcd.display(img)
+del img