Micropython-ESP32-W5500 (Wiznet)
Connect your ESP32 to W5500 (Wiznet) ethernet module and use Python requests as http client
COMPONENTS
Hardware components
WIZnet - W5500
x 1
adafruit - Adafruit Feather HUZZAH with ESP8266 WiFi
x 1
PROJECT DESCRIPTION
Connect your ESP32 to W5500 (Wiznet) ethernet module and use Python requests as http client
Hardware
ESP32 ESP-WROOM-32
W5500 (or W5100)
Firmware
Micropython
Tools
python ampy (install using pip)
pip install adafruit-ampy
Wiring
| ESP-32 | W5500 |
|---|---|
| 3V3 | V |
| GND | G |
| GPIO5(VSPI_CS) | CS |
| GPIO18(VSPI_CLK) | SCK |
| GPIO23(VSPI_MOSI) | MO |
| GPIO19(VSPI_MISO) | MI |
| GPIO34 | RST |
Instructions
- Upload wiznet5k.mpy, wiznet5k_dhcp.mpy, wiznet5k_dns.mpy, wiznet5k_socket.mpy,sma_esp32_w5500_requests with ampy
example: (replace COM9 with your esp32 connected serial port)
ampy --port COM9 put wiznet5k.mpy
ampy --port COM9 put wiznet5k_dhcp.mpy
ampy --port COM9 put wiznet5k_dns.mpy
ampy --port COM9 put wiznet5k_socket.mpy
ampy --port COM9 put sma_esp32_w5500_requests.mpy
- run main.py or below code:
from wiznet5k import WIZNET5K
from machine import Pin, SPI
import wiznet5k_socket as socket
import time
import struct
import sma_esp32_w5500_requests as requests
spi = SPI(2)
cs = Pin(5,Pin.OUT)
rst=Pin(34)
nic = WIZNET5K(spi,cs,rst)
TEXT_URL = "http://quietlushbrightverse.neverssl.com/online/"
print("Chip Version:", nic.chip)
print("MAC Address:", [hex(i) for i in nic.mac_address])
print("My IP address is:", nic.pretty_ip(nic.ip_address))
print("IP lookup google.com: %s" %nic.pretty_ip(nic.get_host_by_name("google.com")))
# Initialize a requests object with a socket and ethernet interface
requests.set_socket(socket, nic)
#nic._debug = True
print("Fetching text from", TEXT_URL)
r = requests.get(TEXT_URL)
print('-'*40)
print(r.text)
print('-'*40)
r.close()
print("Done!")
Limitations
Only Works with http (not https)
How to login in asp.net forms with getting a cookie (forms-based authentication)
First we need to get login page after that we need to post the username and password with __VIEWSTATE of the page, Finally, we need to send the cookie for private pages. in this example the login page named logon.aspx and the private page is default.aspx .
from wiznet5k import WIZNET5K
from machine import Pin, SPI
import wiznet5k_socket as socket
import sma_esp32_w5500_requests as requests
def findVal(txt,tag):
g=txt[txt.find(tag):]
g=g[g.find("value"):]
g=g[:g.find("/>")]
g=g.strip()
g=g.replace("value=\"","")
g=g[:-1] # remove "
return g
spi = SPI(2)
cs = Pin(5,Pin.OUT)
rst=Pin(34)
nic = WIZNET5K(spi,cs,rst)
print("Chip Version:", nic.chip)
print("MAC Address:", [hex(i) for i in nic.mac_address])
print("My IP address is:", nic.pretty_ip(nic.ip_address))
requests.set_socket(socket, nic)
url = 'http://win.smait.ir/logon.aspx'
g = requests.get(url).text
payload ={}
payload['__EVENTTARGET']=""
payload['__EVENTARGUMENT']=""
payload['__VIEWSTATE']=findVal(g,'__VIEWSTATE')
payload['__VIEWSTATEGENERATOR']=findVal(g,'__VIEWSTATEGENERATOR')
payload['__EVENTVALIDATION']=findVal(g,'__EVENTVALIDATION')
payload['txtUserName']="1"
payload['txtUserPass']="2"
payload['Button1']="Login"
print(payload)
p = requests.post(url, data=payload)
print(p.headers)
cookie=p.headers['set-cookie'].split('; expires=')[0]
print(cookie)
p2 = requests.get('http://win.smait.ir/default.aspx', headers={"Cookie":cookie})
print(p2.text)
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