Saving lab state

README.md

@@ -152,3 +152,8 @@ Let's assume you haven't built the ESP8266 sensor. You can still test your servi
 ### Libs
 
 - https://github.com/jczic/MicroWebSrv
+
+
+## rshell
+
+rshell is a shell for accessing a mi

basic_dht/main.py

@@ -0,0 +1,23 @@
+import time
+
+from dht import DHT11
+from machine import Pin
+
+
+sensor1 = DHT11(Pin(2))
+# sensor2 = DHT11(Pin(2))
+
+
+while True:
+    data = {
+        "sensor_1": {
+            "temp": sensor1.temperature(),
+            "humidity": sensor1.humidity(),
+        },
+        # "sensor_2": {
+        #     "temp": sensor2.temperature(),
+        #     "humidity": sensor2.humidity(),
+        # },
+    }
+    print(data)
+    time.sleep(3)

iot_power/SPEC.md

@@ -0,0 +1,17 @@
+# Open Water Change Specification
+
+## Startup
+
+On startup the Open Water Change(OWC) should check for a config.json file under the root directory. If found it should parse the contents and attempts to connect to wireless access points in the order that they are listed.
+
+```
+{
+"xor_key": 42,
+access_points: [
+    {
+        "ssid": "whatever",
+        "secret": ""
+    }
+]
+}
+```

iot_power/boot.py

@@ -0,0 +1,67 @@
+# import json
+# import network
+# import time
+
+
+# # def xor_encrypt_decrypt(input_string, key):
+# #     output = "".join(chr(ord(char) ^ key) for char in input_string)
+# #     return output
+
+
+# # def wifi_connect(ssid, password, timeout=10):
+# #     """
+# #     Connects to the specified Wi-Fi access point.
+
+# #     :param ssid: The SSID of the Wi-Fi network.
+# #     :param password: The password for the Wi-Fi network.
+# #     :param timeout: Time in seconds to wait for connection.
+# #     :return: True if connected, False otherwise.
+# #     """
+# #     wlan = network.WLAN(network.STA_IF)
+# #     wlan.active(True)
+
+# #     if not wlan.isconnected():
+# #         print(f"Connecting to network: {ssid}...")
+# #         wlan.connect(ssid, password)
+
+# #         start_time = time.time()
+# #         while not wlan.isconnected():
+# #             if time.time() - start_time > timeout:
+# #                 print("Connection timeout!")
+# #                 wlan.active(False)
+# #                 del wlan
+# #                 return False
+# #             time.sleep(1)
+
+# #     print("Network connected!")
+# #     print("IP Address:", wlan.ifconfig()[0])
+# #     return True
+
+
+# def wifi_setup():
+#     # try:
+#     #     with open("config.json", "r") as f:
+#     #         config = json.load(f)
+
+#     #     for ap in config.get("access_points", []):
+#     #         result = wifi_connect(
+#     #             ap["ssid"], xor_encrypt_decrypt(ap["secret"], config["xor_key"])
+#     #         )
+#     #         if result:
+#     #             return
+
+#     # except (OSError, ValueError) as e:
+#     #     print("OSError config.json unreadable or no")
+
+#     print("Falling back on selfhosted AP")
+#     ap = network.WLAN(network.AP_IF)
+#     ap.config(essid="RP2040-AP-2", password="testing123")
+#     ap.ifconfig(("192.168.4.1", "255.255.255.0", "192.168.4.1", "192.168.4.1"))
+#     ap.active(True)
+#     print("SSID RP2040-AP")
+#     return
+
+
+# print("Attempting to connect to wifi")
+# time.sleep(10)
+# wifi_setup()

iot_power/main.py

@@ -0,0 +1,71 @@
+import network
+import socket
+import machine
+import time
+
+# Setup RP2040 as an access point
+ap = network.WLAN(network.AP_IF)
+ap.config(essid="RP2040-AP-3", password="testing123")
+ap.ifconfig(("192.168.4.1", "255.255.255.0", "192.168.4.1", "192.168.4.1"))
+ap.active(True)
+
+# Initialize onboard LED
+led = machine.Pin("LED", machine.Pin.OUT, value=1)
+motor_ctl_a = machine.Pin(16, machine.Pin.OUT, value=0)
+motor_ctl_b = machine.Pin(17, machine.Pin.OUT, value=0)
+
+# Create a socket and listen on port 80
+addr = socket.getaddrinfo("0.0.0.0", 80)[0][-1]
+# s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+s = socket.socket()
+s.bind(addr)
+# only allowed to listen to 5 connections in AP mode
+s.listen(5)
+
+print("listening on", ap.ifconfig()[0])
+
+# HTML to send to browsers
+html = """
+<!DOCTYPE html>
+<html>
+<body>
+<h1>Toggle Motor</h1>
+<button onclick="toggleLED()">Toggle LED</button>
+<script>
+function toggleLED() {
+  var xhr = new XMLHttpRequest();
+  xhr.open("POST", "/toggle", true);
+  xhr.send();
+}
+</script>
+</body>
+</html>
+"""
+
+
+def serve():
+    conn, addr = s.accept()
+    print("client connected from", addr)
+    request = conn.recv(1024)
+    request_str = str(request)
+    print("request:", request_str)
+
+    if "POST /toggle" in request_str:
+        led.toggle()
+        motor_ctl_a.toggle()  # Toggle LED state
+        conn.send("HTTP/1.1 200 OK\n\nLED Toggled")
+    else:
+        conn.send("HTTP/1.1 200 OK\n")
+        conn.send("Content-Type: text/html\n")
+        conn.send("Connection: close\n\n")
+        conn.sendall(html)  # Send HTML page
+    conn.close()
+
+
+# Main loop: accept connections and respond
+for i in range(10):
+    print(f"Preparing to serve...{i}")
+    time.sleep(1)
+
+while True:
+    serve()

open_water_change/SPEC.md

@@ -0,0 +1,17 @@
+# Open Water Change Specification
+
+## Startup
+
+On startup the Open Water Change(OWC) should check for a config.json file under the root directory. If found it should parse the contents and attempts to connect to wireless access points in the order that they are listed.
+
+```
+{
+"xor_key": 42,
+access_points: [
+    {
+        "ssid": "whatever",
+        "secret": ""
+    }
+]
+}
+```

open_water_change/boot.py

@@ -0,0 +1,67 @@
+import json
+import network
+import time
+
+
+def xor_encrypt_decrypt(input_string, key):
+    output = "".join(chr(ord(char) ^ key) for char in input_string)
+    return output
+
+
+def wifi_connect(ssid, password, timeout=10):
+    """
+    Connects to the specified Wi-Fi access point.
+
+    :param ssid: The SSID of the Wi-Fi network.
+    :param password: The password for the Wi-Fi network.
+    :param timeout: Time in seconds to wait for connection.
+    :return: True if connected, False otherwise.
+    """
+    wlan = network.WLAN(network.STA_IF)
+    wlan.active(True)
+
+    if not wlan.isconnected():
+        print(f"Connecting to network: {ssid}...")
+        wlan.connect(ssid, password)
+
+        start_time = time.time()
+        while not wlan.isconnected():
+            if time.time() - start_time > timeout:
+                print("Connection timeout!")
+                wlan.active(False)
+                del wlan
+                return False
+            time.sleep(1)
+
+    print("Network connected!")
+    print("IP Address:", wlan.ifconfig()[0])
+    return True
+
+
+def wifi_setup():
+    # try:
+    #     with open("config.json", "r") as f:
+    #         config = json.load(f)
+
+    #     for ap in config.get("access_points", []):
+    #         result = wifi_connect(
+    #             ap["ssid"], xor_encrypt_decrypt(ap["secret"], config["xor_key"])
+    #         )
+    #         if result:
+    #             return
+
+    # except (OSError, ValueError) as e:
+    #     print("OSError config.json unreadable or no")
+
+    print("Falling back on selfhosted AP")
+    ap = network.WLAN(network.AP_IF)
+    ap.config(essid="RP2040-AP", password="openwater")
+    ap.ifconfig(("192.168.4.1", "255.255.255.0", "192.168.4.1", "192.168.4.1"))
+    ap.active(True)
+    print("SSID RP2040-AP")
+    return
+
+
+print("Attempting to connect to wifi")
+# time.sleep(10)
+wifi_setup()

open_water_change/main.py

@@ -0,0 +1,67 @@
+import network
+import socket
+import machine
+
+
+# Setup RP2040 as an access point
+# ap = network.WLAN(network.AP_IF)
+# ap.config(essid="RP2040-AP", password="testing123")
+# ap.ifconfig(("192.168.4.1", "255.255.255.0", "192.168.4.1", "192.168.4.1"))
+# ap.active(True)
+
+# Initialize onboard LED
+led = machine.Pin("LED", machine.Pin.OUT, value=1)
+motor_ctl_a = machine.Pin(16, machine.Pin.OUT, value=0)
+motor_ctl_b = machine.Pin(17, machine.Pin.OUT, value=0)
+
+# Create a socket and listen on port 80
+addr = socket.getaddrinfo("0.0.0.0", 80)[0][-1]
+# s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+s = socket.socket()
+s.bind(addr)
+# only allowed to listen to 5 connections in AP mode
+s.listen(5)
+
+# print("listening on", ap.ifconfig()[0])
+
+# HTML to send to browsers
+html = """
+<!DOCTYPE html>
+<html>
+<body>
+<h1>Toggle Motor</h1>
+<button onclick="toggleLED()">Toggle LED</button>
+<script>
+function toggleLED() {
+  var xhr = new XMLHttpRequest();
+  xhr.open("POST", "/toggle", true);
+  xhr.send();
+}
+</script>
+</body>
+</html>
+"""
+
+
+def serve():
+    conn, addr = s.accept()
+    print("client connected from", addr)
+    request = conn.recv(1024)
+    request_str = str(request)
+    print("request:", request_str)
+
+    if "POST /toggle" in request_str:
+        led.toggle()
+        motor_ctl_a.toggle()  # Toggle LED state
+        conn.send("HTTP/1.1 200 OK\n\nLED Toggled")
+    else:
+        conn.send("HTTP/1.1 200 OK\n")
+        conn.send("Content-Type: text/html\n")
+        conn.send("Connection: close\n\n")
+        conn.sendall(html)  # Send HTML page
+    conn.close()
+
+
+# Main loop: accept connections and respond
+while True:
+    serve()

webserver/turtle_bot_alt.md

@@ -0,0 +1,8 @@
+A Turtlebot Alternative
+
+Dear Reader,
+
+Why would you pay $1,336.99 for a Turtlebot4 when you could build one for less than <insert price>? Today I’ll break down how I built a ROS2 Turtlebot4 clone, and saved hundreds of dollars in the process.
+
+What makes a Turtlebot?
+Well, a [Turtlebot](https://clearpathrobotics.com/turtlebot-4/) is actually learning platform robot built and sold by Clearpath Robotics  dw

webserver/webserver.py

@@ -6,12 +6,13 @@ except ImportError:
     import socket
 
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-s.bind(('', 80))
+s.bind(("", 80))
 s.listen(5)
 
 
 def render_html(context: dict = {}):
-    html = """<html><head><meta name="viewport" content="width=device-width, initial-scale=1">
+    html = (
+        """<html><head><meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="icon" href="data:,"><style>body { text-align: center; font-family: "Trebuchet MS", Arial;}
     table { border-collapse: collapse; width:35%; margin-left:auto; margin-right:auto; }
     th { padding: 12px; background-color: #0043af; color: white; }
@@ -21,10 +22,19 @@ def render_html(context: dict = {}):
     .sensor { color:white; font-weight: bold; background-color: #bcbcbc; padding: 1px;
     </style></head><body><h1>ESP32 Sensor Output</h1>
     <table><tr><th>MEASUREMENT</th><th>VALUE</th></tr>
-    <tr><td>Temp. Celsius</td><td><span class="sensor">""" + str(context.get('cel')) + """</span></td></tr>
+    <tr><td>Temp. Celsius</td><td><span class="sensor">"""
-    <tr><td>Temp. Fahrenheit</td><td><span class="sensor">""" + str(context.get('fahr')) + """F</span></td></tr>
+        + str(context.get("cel"))
-    <tr><td>Light</td><td><span class="sensor">""" + str(context.get('light')) + """%</span></td></tr>
+        + """</span></td></tr>
-    <tr><td>Humidity</td><td><span class="sensor">""" + str(context.get('hum')) + """%</span></td></tr></body></html>"""
+    <tr><td>Temp. Fahrenheit</td><td><span class="sensor">"""
+        + str(context.get("fahr"))
+        + """F</span></td></tr>
+    <tr><td>Light</td><td><span class="sensor">"""
+        + str(context.get("light"))
+        + """%</span></td></tr>
+    <tr><td>Humidity</td><td><span class="sensor">"""
+        + str(context.get("hum"))
+        + """%</span></td></tr></body></html>"""
+    )
     return html
 
 
@@ -34,16 +44,16 @@ def http_respond(html: str):
             gc.collect()
         conn, addr = s.accept()
         conn.settimeout(3.0)
-        print('Got a connection from: {addr}'.format(addr=addr))
+        print("Got a connection from: {addr}".format(addr=addr))
         request = conn.recv(1024)
         conn.settimeout(None)
         request = str(request)
-        print('Content = {}'.format(request))
+        print("Content = {}".format(request))
-        conn.send('HTTP/1.1 200 OK\n')
+        conn.send("HTTP/1.1 200 OK\n")
-        conn.send('Content-Type: text/html\n')
+        conn.send("Content-Type: text/html\n")
-        conn.send('Connection: close\n\n')
+        conn.send("Connection: close\n\n")
         conn.sendall(html)
         conn.close()
     except OSError as err:
         conn.close()
-        print('Connection closed')
+        print("Connection closed")