Added a version of serial->TCP test script that does not wait to receive...

Added a version of serial->TCP test script that does not wait to receive message before sending the next one.

wifi_bridge/test_scripts/serial-tcp_nowait.py

+import socket
+import serial
+import time
+
+TCP_IP = "192.168.1.1"
+TCP_PORT = 8080
+
+msg_size = 500
+print_interval = 100
+message = bytes(i % 256 for i in range(msg_size))
+dropped = True
+loop_time = 0.005
+
+ser = serial.Serial('COM6', 921600, timeout=0.01)
+ser.reset_input_buffer()
+
+sent_cnt = 0
+recvd_cnt = 0
+outer_start_time = time.perf_counter()
+received = []
+while True:
+    if dropped:
+        attempts = 0
+        while attempts < 5:
+            print("Trying to connect")
+            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            sock.settimeout(2)
+            try:
+                sock.connect((TCP_IP, TCP_PORT))
+                dropped = False
+                break
+            except:
+                attempts += 1
+        if dropped:
+            print("Failed to connect")
+            break
+        print("connected")
+
+    start_time = time.perf_counter()
+    try:
+        ser.write(message)
+        sent_cnt += 1
+    except Exception as e:
+        print("Failed to send all data")
+        continue
+
+    # while len(received) < msg_size:
+    try:
+        amt_in_air = (sent_cnt - recvd_cnt) * msg_size - len(received)
+        just_received = sock.recv(1024)
+        received.extend(just_received)
+        if len(just_received) == 0:
+            print("Your socket broke")
+            break
+    except Exception as e:
+        print("Exception when receiving: ", e)
+        break
+    if len(received) >= msg_size:
+        recvd_packet = received[:msg_size]
+        received = received[msg_size:]
+        recvd_cnt += 1
+        if bytes(recvd_packet) != message:
+            print("Received data does not match")
+    if sent_cnt % print_interval == 0:
+        print("Sent {}, received {}".format(sent_cnt, recvd_cnt))
+        print("Average send time was {}".format((time.perf_counter() - outer_start_time)/print_interval))
+        outer_start_time = time.perf_counter()
+        
+    while time.perf_counter() - start_time <= loop_time:
+        pass
+
+    #debug_msg = ser.read(4096)
+    #if len(debug_msg) != 0:
+    #    print(debug_msg.decode())