Working hello world server example

Author: Matt Costi

adafruit_esp32spi/adafruit_esp32spi.py

@@ -682,6 +682,11 @@ def start_server(self, port, socket_num, conn_mode=TCP_MODE, ip=None):
         if resp[0][0] != 1:
             raise RuntimeError("Could not start server")
 
+    def get_server_state(self, socket_num):
+        self._socknum_ll[0][0] = socket_num
+        resp = self._send_command_get_response(_GET_STATE_TCP_CMD, self._socknum_ll)
+        return resp[0][0]
+
     def set_esp_debug(self, enabled):
         """Enable/disable debug mode on the ESP32. Debug messages will be
         written to the ESP32's UART."""

examples/esp32spi_server.py

@@ -1,5 +1,6 @@
 import board
 import busio
+import time
 from digitalio import DigitalInOut
 from secrets import secrets
 
@@ -13,37 +14,73 @@
 esp32_cs = DigitalInOut(board.D10)
 esp32_ready = DigitalInOut(board.D9)
 esp32_reset = DigitalInOut(board.D7)
+esp32_gpio0 = DigitalInOut(board.D12)
 
 
 spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
-esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset, debug=True)
+esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset, gpio0_pin=esp32_gpio0, debug=False)
 
+## Create Access Point from SSID and optional password in secrets
 wifi = wifimanager.ESPSPI_WiFiManager(esp, secrets, debug=True)
-
 wifi.create_ap()
 time.sleep(10)
 
-sock = socket.socket() # gets and creates a socket
-sock_num = sock.get_sock_num() # returns socket number
+socket.set_interface(esp)
+sock = socket.socket() # Request a socket for the server
+curr_sock = sock
+sockNum = sock.get_sock_num()
+print("server status: ", esp.get_server_state(sockNum))
+
+# Start the server on port 80 with the socket number we just requested for it.
+esp.start_server(80, sockNum)
 
-esp.start_server(sock_num, 80)
-print("socket num: ", sock_num)
-print("socket status?: ", esp.socket_status(sock_num))
+print("socket num: ", sockNum)
+print("server status: ", esp.get_server_state(sockNum))
 print("IP addr: ", esp.pretty_ip(esp.ip_address))
+print("info: ", esp.network_data)
+print("done!")
+
 
 status = 0
+last_sock = 255
+def server_avail(): # TODO: make a server helper class
+    global last_sock
+    sock = 255;
+
+    if (curr_sock != 255):
+        # if (last_sock != 255):
+        #       TODO: if last sock, check that last_sock is still connected and available
+        #     sock = last_sock
+        if (sock == 255):
+            sock = esp.socket_available(sockNum)
+    if (sock != 255):
+        last_sock = sock
+        return sock
+
+    return 255
+
 while True:
-    if status != esp.status:
+    if status != esp.status: # TODO: Move device connected check to server class ?
         status = esp.status
 
         if status == 8:
-            print("Device connected!") ## works
+            print("Device connected! status=", status)
         else:
-            print("Device disconnected status=", status) ## works
+            print("Device disconnected! status=", status)
 
-    print("socket available?: ", esp.socket_available(sockNum))
-    print("socket_status: ", esp.socket_status(sockNum))
-    print(sock.read())
 
+    avail = server_avail()
+    if (avail != 255):
+        sock.set_sock_num(avail) # TODO: Server class should return a new client socket
+        data = sock.read()
+        if (len(data)):
+            print(data)
+            sock.write(b"HTTP/1.1 200 OK\r\n");
+            sock.write(b"Content-type:text/html\r\n");
+            sock.write(b"\r\n");
 
-print("done!")
+            sock.write(b"Click <a href=\"/H\">here</a> turn the LED on!!!<br>\r\n");
+            sock.write(b"Click <a href=\"/L\">here</a> turn the LED off!!!!<br>\r\n");
+
+            sock.write(b"\r\n")
+            sock.close()