Chapter 9

ch-9/3-sensors/sensor_remote.py

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+# .deploy/send-it.sh \
+#   ch-9/3-sensors/sensor_remote.py \
+#   ch-9/3-sensors/robot_wifi.py \
+#   ch-9/3-sensors/robot.py \
+#   ch-9/3-sensors/pio_encoder.py \
+#   ch-9/3-sensors/sensor.html
+import json
+
+from adafruit_esp32spi import adafruit_esp32spi_wsgiserver
+from adafruit_wsgi.wsgi_app import WSGIApp
+
+import robot_wifi
+import robot
+
+app = WSGIApp()
+
+@app.route("/")
+def index(request):
+  with open("sensor.html") as fd:
+    hello_html = fd.read()
+  return 200, [('Content-Type',"text/html")], hello_html
+
+@app.route("/sensors")
+def sensors(request):
+  sensor_data = {
+    "left_distance": robot.left_distance.distance,
+  }
+  robot.left_distance.clear_interrupt()
+
+  return 200, [('Content-Type', 'application/json')], json.dumps({sensor_data})
+
+print("Setting up wifi.")
+wifi, esp = robot_wifi.connect_to_wifi()
+server = adafruit_esp32spi_wsgiserver.WSGIServer(
+  80,
+  application=app 
+)
+adafruit_esp32spi_wsgiserver.set_interface(esp)
+
+print("Initialising sensors")
+robot.left_distance.distance_mode = 1
+robot.left_distance.start_ranging()
+
+
+print("Starting server")
+
+server.start()
+ip_int = ".".join(str(int(n)) for n in esp.ip_address)
+print(f"IP Address is {ip_int}")
+while True:
+    try:
+        server.update_poll()
+        # background task
+    except:
+        print("Shutting down wifi on failure. resetting ESP")
+        wifi.reset()
+        raise
+
+# Reader exercise
+# add the right distance to the distance sensor remote. Consider where to position the meter for this, how to return both sensors in 
+# the sensors call. Don't forget to clear the interrupt to get new readings.