Added initial native iOS analog joysticks (Swift), added basic serial…

… comm in python

* Basic analog joysticks in iOS using a Swift library
* Added basic serial communication in Python 3
* Updated to MQTT scripts for Python 3
* Updated esp8266 MQTT code

MQTT/MQTT_connectPub.py

@@ -59,7 +59,8 @@ def on_connect(client, userdata, flags, rc):
     counter += 1
 
     timestamp = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
-    send_time = str(timestamp) + ' Count: ' + str(counter)
-
-    client.publish('CRAWLAB/from_python', send_time, qos = 0)
+#     send_time = str(timestamp) + ' Count: ' + str(counter)
+    send_time = str(counter % 8)
+    print(send_time)
+    client.publish('CRAWLAB/to_cable', send_time, qos = 0)
     time.sleep(0.1)

Serial Communication/basic_serial_communication.py

@@ -0,0 +1,76 @@
+#! /usr/bin/env python
+
+###############################################################################
+# basic_serial_communication.py
+#
+# script to achieve basic send/receive communication
+#
+# NOTE: Any plotting is set up for output, not viewing on screen.
+#       So, it will likely be ugly on screen. The saved PDFs should look
+#       better.
+#
+# Created: 05/27/16
+#   - Joshua Vaughan
+#   - [email protected]
+#   - http://www.ucs.louisiana.edu/~jev9637
+#
+# Modified:
+#   *
+#
+###############################################################################
+
+import numpy as np
+import logging
+import serial
+import time
+
+logger = logging.getLogger(__name__)
+
+# TODO: Make a nice class-based serial object for easier reuse
+# class serial_comm(object):
+#     ''' Class for sending/receiving serial data'''
+#     def __init__(self, port):
+#         self.port = port
+#         self.ser = serial.Serial(port, 115200)
+# 
+#     # Sends throttle and steering angle commands to platform
+#     def send_string(self, string):
+#     
+#         if type(string) is str:
+#             # Write the data to the serial connection - to the Arudino for CAN bus formatting
+#             self.ser.write(str(string))
+#         else:
+#             logging.debug('The send_string method requires a str type argument.')
+#     
+#     def __del__(self):
+#         self.ser.close()
+#     
+
+if __name__ == '__main__':
+    # serial port will have to change based on configuration
+    PORT = '/dev/tty.usbserial-A6001Ko5'
+
+    # define the serial communication parameters, 8 bits, no parity, 1 stop bit
+    BPS = 115200
+
+    ser = serial.Serial(PORT, BPS)
+
+    time_start = time.time()
+
+    try:
+        while True:
+            dt = time.time() - time_start
+
+            data = 100 * np.sin(0.5*np.pi * dt)
+
+            data_string = '{}\r\n'.format(int(data)).encode('utf-8')
+
+            ser.write(data_string)
+            print(data_string)
+
+            time.sleep(0.05)
+
+
+    except (KeyboardInterrupt, SystemExit):
+        ser.close()
+

esp8266/esp8266_MQTT/esp8266_MQTT.ino

@@ -45,6 +45,7 @@ Created: 01/28/16
 #include <ESP8266WiFi.h>
 #include <PubSubClient.h>
 
+
 // Update these with values suitable for your network.
 const char* WIFI_SSID = "Doc_Vaughan";
 const char* WIFI_PASSWORD = "rougeourobots";