Demo TCP for CircuitPython

tcpdemo.py

# tcp socket recv demo
# Randall Bohn 2021-03-13
import time
import board
import busio
from digitalio import DigitalInOut, Direction
from adafruit_esp32spi import adafruit_esp32spi
import adafruit_esp32spi.adafruit_esp32spi_socket as socket
import adafruit_requests as requests
from secrets import secrets

# AirLift Shield
# Adafruit CircuitPython 6.1.0 on 2021-01-21; Adafruit Metro M4 Express with samd51j19
# esp32spi
esp32_cs = DigitalInOut(board.D10)
esp32_ready = DigitalInOut(board.D7)
esp32_reset = DigitalInOut(board.D5)

# connect to AP using secrets.py
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
esp.connect(secrets)
esp._debug=True
socket.set_interface(esp)

# your router or other HTTP server
peer = "192.168.0.1"
port = 80

def demo_recv(host=peer, port=port, n=1024):
    addr_info = socket.getaddrinfo(host, port)
    # get the connection particulars
    particulars = addr_info[0][4]
    print(f"connecting to {particulars[0]}:{particulars[1]}")
    sock = socket.socket()
    sock.connect(particulars)
    # a not very good HTTP request -- just so we can get a response
    sock.send("GET / HTTP1.0\r\n\r\n".encode())
    response = sock.recv(n).decode()
    return response

# print(demo_recv())