From 1c6d703afc961e1fe351137168c6f04a8bb3707c Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Thu, 18 Mar 2021 14:53:25 -0500
Subject: [PATCH 1/4] UDP Client example (NTP)

 using socket API rather than esp API
---
 examples/esp32spi_udp_client.py | 47 +++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 examples/esp32spi_udp_client.py

diff --git a/examples/esp32spi_udp_client.py b/examples/esp32spi_udp_client.py
new file mode 100644
index 0000000..ce58e88
--- /dev/null
+++ b/examples/esp32spi_udp_client.py
@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2021 Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import struct
+import time
+import board
+from digitalio import DigitalInOut
+from adafruit_esp32spi import adafruit_esp32spi
+import adafruit_esp32spi.adafruit_esp32spi_socket as socket
+from secrets import secrets
+
+
+TIMEOUT = 5
+# edit host and port to match server
+HOST = "pool.ntp.org"
+PORT = 123
+NTP_TO_UNIX_EPOCH = 2208988800  # 1970-01-01 00:00:00
+
+# PyPortal or similar; edit 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("Sending")
+s.connect(socketaddr, esp.UDP_MODE)
+packet = bytearray(48)
+packet[0] = 0b00100011  # Not leap second, NTP version 4, Client mode
+s.send(packet, conntype=esp.UDP_MODE)
+
+print("Receiving")
+packet = s.recv(48)
+seconds = struct.unpack_from("!I", packet, offset=len(packet) - 8)[0]
+print("Time:", time.localtime(seconds - NTP_TO_UNIX_EPOCH))

From e3d28955324fbab42a68a217001c6c45d4cd5aef Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Thu, 18 Mar 2021 15:01:51 -0500
Subject: [PATCH 2/4] pylint

---
 examples/esp32spi_udp_client.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/esp32spi_udp_client.py b/examples/esp32spi_udp_client.py
index ce58e88..c018731 100644
--- a/examples/esp32spi_udp_client.py
+++ b/examples/esp32spi_udp_client.py
@@ -3,11 +3,11 @@
 
 import struct
 import time
+from secrets import secrets
 import board
 from digitalio import DigitalInOut
 from adafruit_esp32spi import adafruit_esp32spi
 import adafruit_esp32spi.adafruit_esp32spi_socket as socket
-from secrets import secrets
 
 
 TIMEOUT = 5
@@ -33,6 +33,7 @@
 socket.set_interface(esp)
 socketaddr = socket.getaddrinfo(HOST, PORT)[0][4]
 s = socket.socket()
+
 s.settimeout(TIMEOUT)
 
 print("Sending")

From e908f3ab201322905e1e2031c28ddeaffeecf8e5 Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Thu, 18 Mar 2021 15:13:52 -0500
Subject: [PATCH 3/4] attempt to fix pylint secrets failure

---
 examples/esp32spi_udp_client.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/examples/esp32spi_udp_client.py b/examples/esp32spi_udp_client.py
index c018731..fbf032a 100644
--- a/examples/esp32spi_udp_client.py
+++ b/examples/esp32spi_udp_client.py
@@ -3,12 +3,17 @@
 
 import struct
 import time
-from secrets import secrets
 import board
 from digitalio import DigitalInOut
 from adafruit_esp32spi import adafruit_esp32spi
 import adafruit_esp32spi.adafruit_esp32spi_socket as socket
 
+# Get wifi details and more from a secrets.py file
+try:
+    from secrets import secrets
+except ImportError:
+    print("WiFi secrets are kept in secrets.py, please add them there!")
+    raise
 
 TIMEOUT = 5
 # edit host and port to match server

From aca519f61f38b26353a8ea8d31df3adc02c7c26a Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Thu, 18 Mar 2021 15:38:16 -0500
Subject: [PATCH 4/4] clarify connect kwarg

---
 examples/esp32spi_udp_client.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/esp32spi_udp_client.py b/examples/esp32spi_udp_client.py
index fbf032a..6d77203 100644
--- a/examples/esp32spi_udp_client.py
+++ b/examples/esp32spi_udp_client.py
@@ -42,7 +42,7 @@
 s.settimeout(TIMEOUT)
 
 print("Sending")
-s.connect(socketaddr, esp.UDP_MODE)
+s.connect(socketaddr, conntype=esp.UDP_MODE)
 packet = bytearray(48)
 packet[0] = 0b00100011  # Not leap second, NTP version 4, Client mode
 s.send(packet, conntype=esp.UDP_MODE)