From 00825c8229faf5bea2cd3a1c7ae49dd8f510ff83 Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Mon, 15 Mar 2021 10:45:43 -0500
Subject: [PATCH 1/3] Create esp32spi_tcp_client.py

A simple TCP client example using ESP32SPI.

Requires running a TCP server listening on the same port. For example, CPython on a general-purpose computer:
https://github.com/adafruit/circuitpython/blob/main/tests/circuitpython-manual/socketpool/client/host-server.py
or CircuitPython native sockets:
https://github.com/adafruit/circuitpython/blob/main/tests/circuitpython-manual/socketpool/server/cpy-server.py
---
 examples/esp32spi_tcp_client.py | 43 +++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 examples/esp32spi_tcp_client.py

diff --git a/examples/esp32spi_tcp_client.py b/examples/esp32spi_tcp_client.py
new file mode 100644
index 0000000..caf95a8
--- /dev/null
+++ b/examples/esp32spi_tcp_client.py
@@ -0,0 +1,43 @@
+# SPDX-FileCopyrightText: 2021 Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import board
+from digitalio import DigitalInOut
+from adafruit_esp32spi import adafruit_esp32spi
+import adafruit_esp32spi.adafruit_esp32spi_socket as socket
+import adafruit_requests as requests
+from secrets import secrets
+
+
+TIMEOUT = 5
+# adjust host and port to match server
+HOST = "192.168.10.179"
+PORT = 5000
+
+# PyPortal or similar; adjust pins as needed
+spi = board.SPI()
+esp32_cs = DigitalInOut(board.ESP_CS)
+esp32_ready = DigitalInOut(board.ESP_BUSY)
+esp32_reset = DigitalInOut(board.ESP_RESET)
+esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
+
+# connect to wifi AP
+esp.connect(secrets)
+
+# test for connectivity to server
+print("Server ping:", esp.ping(HOST), "ms")
+
+# create the socket
+socket.set_interface(esp)
+socketaddr = socket.getaddrinfo(HOST, PORT)[0][4]
+s = socket.socket()
+s.settimeout(TIMEOUT)
+
+print("Connecting")
+s.connect(socketaddr)
+
+print("Sending")
+s.send(b'Hello, world')
+
+print("Receiving")
+print(s.recv(128))

From 643b462868252de6dc51cba618a2b63ea9b5382c Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Mon, 15 Mar 2021 10:54:40 -0500
Subject: [PATCH 2/3] black

---
 examples/esp32spi_tcp_client.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/esp32spi_tcp_client.py b/examples/esp32spi_tcp_client.py
index caf95a8..4ef79bb 100644
--- a/examples/esp32spi_tcp_client.py
+++ b/examples/esp32spi_tcp_client.py
@@ -37,7 +37,7 @@
 s.connect(socketaddr)
 
 print("Sending")
-s.send(b'Hello, world')
+s.send(b"Hello, world")
 
 print("Receiving")
 print(s.recv(128))

From 25a3e504efa96e194155317521e6ebb38820ee45 Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Mon, 15 Mar 2021 17:53:31 -0500
Subject: [PATCH 3/3] host and socket that yields a response

I'm open to any other suggestions. The following is received back:
`b'HTTP/1.1 403 Forbidden\r\nServer: nginx/1.10.3 (Ubuntu)\r\nDate: Mon, 15 Mar 2021 22:52:10 GMT\r\nContent-Type: text/html\r\nContent-Length: 178\r\nConnection: close\r\n\r\n'`
---
 examples/esp32spi_tcp_client.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/examples/esp32spi_tcp_client.py b/examples/esp32spi_tcp_client.py
index 4ef79bb..0663a52 100644
--- a/examples/esp32spi_tcp_client.py
+++ b/examples/esp32spi_tcp_client.py
@@ -10,11 +10,11 @@
 
 
 TIMEOUT = 5
-# adjust host and port to match server
-HOST = "192.168.10.179"
-PORT = 5000
+# edit host and port to match server
+HOST = "wifitest.adafruit.com"
+PORT = 80
 
-# PyPortal or similar; adjust pins as needed
+# PyPortal or similar; edit pins as needed
 spi = board.SPI()
 esp32_cs = DigitalInOut(board.ESP_CS)
 esp32_ready = DigitalInOut(board.ESP_BUSY)
@@ -37,7 +37,7 @@
 s.connect(socketaddr)
 
 print("Sending")
-s.send(b"Hello, world")
+s.send(b"HEAD / HTTP/1.0\r\n\r\n")
 
 print("Receiving")
-print(s.recv(128))
+print(s.recv(1024))