├── README.md
├── boot.py
├── images
    ├── 10.jpg
    ├── 100.jpg
    ├── 110.jpg
    ├── 120.jpg
    ├── 20.jpg
    ├── 30.jpg
    ├── 40.jpg
    ├── 50.jpg
    ├── 60.jpg
    ├── 65.jpg
    ├── 70.jpg
    ├── 75.jpg
    ├── 80.jpg
    ├── 90.jpg
    ├── alarm_off.jpg
    ├── alarm_on.jpg
    ├── light_off.jpg
    ├── light_on.jpg
    ├── navi2.png
    └── you-screen.png
└── main.py


/README.md:
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 1 | # How to build RC Car with the esp8266. #
 2 | <img src="https://github.com/dgolak/esp8266/blob/master/images/20.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/65.jpg" width="360">
 3 | 
 4 | At the beginning my story I would like to say, that this was my first time to IOT topic.
 5 | I'm a complete beginner, but one thing I have is the desire  to known new technologies.
 6 | 
 7 | A month ago my colleague make presentation about #esp8266 and I was impressed this small board.
 8 | So I decided that I would like to known more about #esp8266 and similar stuff like #arduino.
 9 | 
10 | I use Micropython (http://micropython.org/download) it is a firmware for the #esp8266 boards.
11 | 
12 | At the beginning I don't underestand how it works, but I have read a lot of webpages and articles about it.
13 | The first success when I could turn on and turn off Led :)
14 | Next I bought distance sensor, temperature and humidity sensor....
15 | 
16 | Next I bought the engine but I didn't know nothing about.
17 | So I bought two engines SG90. Unfortunately but it turned out, that it is only the servo engine :(
18 | 
19 | Afterwards I was reading about engines and I bought two engines and motor shield (L298N)
20 | <img src="https://github.com/dgolak/esp8266/blob/master/images/60.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/80.jpg" width="360">
21 | 
22 | ### Together with my son (7years old) we used old lego car body and double sided tape :) ###
23 | 
24 | ### In effect ? ###
25 | <img src="https://github.com/dgolak/esp8266/blob/master/images/30.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/40.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/50.jpg" width="360">
26 | 
27 | ### Then we used the battery 9V to power the motor. ###
28 | <img src="https://github.com/dgolak/esp8266/blob/master/images/90.jpg" width="360">
29 | 
30 | ### Putting all together: ###
31 | <img src="https://github.com/dgolak/esp8266/blob/master/images/100.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/110.jpg" width="360">
32 | <img src="https://github.com/dgolak/esp8266/blob/master/images/120.jpg" width="360">
33 | 
34 | When it comes to steering and turning sideways I used trick.
35 | For example if I wanted turn left I used left engine 30% power and right engine 80-100% power.
36 | 
37 | Next I connected red LED and two light green LED on the front of car
38 | 
39 | ### Everything works fine in python console. ###
40 | For instance, when I wanted to run I typed ** E.forward() **
41 | when I wanted to stop car I had to type ** E.stop(). **
42 | 
43 | ### Python code is on my github (please give me a star :) ): ###
44 | https://github.com/dgolak/esp8266/blob/master/main.py
45 | Afterwards I wrote wifi connection to my mobile phone, simple webserwer and web application to steering a car.
46 | 
47 | ### Putting all together: ###
48 | <img src="https://github.com/dgolak/esp8266/blob/master/images/10.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/20.jpg" width="360">
49 | <img src="https://github.com/dgolak/esp8266/blob/master/images/65.jpg" width="360"> <img src="https://github.com/dgolak/esp8266/blob/master/images/75.jpg" width="360">
50 | 
51 | ### To sum up. ###
52 | It was a great time with my son, we made a simple car with the steering by mobile phone or any devices with the use of WIFI
53 | 
54 | [![Youtube](https://github.com/dgolak/esp8266/blob/master/images/you-screen.png)](https://youtu.be/-qwm66QJIss)
55 | 


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/boot.py:
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 1 | import esp
 2 | #esp.osdebug(None)
 3 | import gc
 4 | import network
 5 | 
 6 | #network connection
 7 | wlan = network.WLAN(network.STA_IF)
 8 | wlan.active(True)
 9 | wlan.connect('WIFI_NAME','WIFI_PASSWORD')
10 | ifcfg = wlan.ifconfig()
11 | 
12 | #webrepl
13 | import webrepl
14 | webrepl.start()
15 | gc.collect()
16 | 


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/images/10.jpg:
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https://raw.githubusercontent.com/dgolak/esp8266/66eb28a52d8f6b281243aa906de2d2bfde5c437f/images/10.jpg


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/images/100.jpg:
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/images/120.jpg:
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/images/20.jpg:
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/images/30.jpg:
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/images/40.jpg:
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/images/50.jpg:
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/images/70.jpg:
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https://raw.githubusercontent.com/dgolak/esp8266/66eb28a52d8f6b281243aa906de2d2bfde5c437f/images/90.jpg


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/images/alarm_off.jpg:
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/images/light_off.jpg:
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/images/navi2.png:
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https://raw.githubusercontent.com/dgolak/esp8266/66eb28a52d8f6b281243aa906de2d2bfde5c437f/images/navi2.png


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/images/you-screen.png:
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https://raw.githubusercontent.com/dgolak/esp8266/66eb28a52d8f6b281243aa906de2d2bfde5c437f/images/you-screen.png


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/main.py:
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  1 | import machine
  2 | import time
  3 | LED_PIN=15
  4 | led=machine.Pin(LED_PIN,machine.Pin.OUT)
  5 | led.off()
  6 | LIGHT_PIN_L=13
  7 | light_l=machine.Pin(LIGHT_PIN_L,machine.Pin.OUT)
  8 | light_l.off()
  9 | LIGHT_PIN_R=2
 10 | light_r=machine.Pin(LIGHT_PIN_R,machine.Pin.OUT)
 11 | light_r.off()
 12 | class engines:
 13 |     def __init__(self, machine):
 14 |         self.machine = machine
 15 |         self.left_first_pin = 0
 16 |         self.left_second_pin = 5
 17 |         self.right_first_pin = 14
 18 |         self.right_second_pin = 12
 19 |     def forward(self, duty=1000):
 20 |         self.stop()
 21 |         e1=machine.PWM(self.machine.Pin(self.left_first_pin),freq=100,duty=duty)
 22 |         e2=machine.PWM(self.machine.Pin(self.right_first_pin),freq=100,duty=duty)
 23 |     def backward(self, duty=1000):
 24 |         self.stop()
 25 |         e1=machine.PWM(self.machine.Pin(self.left_second_pin),freq=100,duty=duty)
 26 |         e2=machine.PWM(self.machine.Pin(self.right_second_pin),freq=100,duty=duty)
 27 |     def left_up(self):
 28 |         self.stop()
 29 |         e1=machine.PWM(self.machine.Pin(self.left_first_pin), freq=100, duty=400)
 30 |         e2=machine.PWM(machine.Pin(self.right_first_pin), freq=100, duty=1000)
 31 |     def right_up(self):
 32 |         self.stop()
 33 |         e1=machine.PWM(self.machine.Pin(self.left_first_pin),freq=100,duty=1000)
 34 |         e2=machine.PWM(self.machine.Pin(self.right_first_pin),freq=100,duty=400)
 35 |     def left_down(self):
 36 |         self.stop()
 37 |         e1=machine.PWM(self.machine.Pin(self.left_second_pin), freq=100, duty=400)
 38 |         e2=machine.PWM(machine.Pin(self.right_second_pin), freq=100, duty=1000)
 39 |     def right_down(self):
 40 |         self.stop()
 41 |         e1=machine.PWM(self.machine.Pin(self.left_second_pin),freq=100,duty=1000)
 42 |         e2=machine.PWM(self.machine.Pin(self.right_second_pin),freq=100,duty=400)
 43 |     def stop(self):
 44 |         machine.PWM(self.machine.Pin(self.left_first_pin),freq=0,duty=0)
 45 |         machine.PWM(self.machine.Pin(self.right_second_pin),freq=0,duty=0)
 46 |         machine.PWM(self.machine.Pin(self.left_second_pin),freq=0,duty=0)
 47 |         machine.PWM(self.machine.Pin(self.right_first_pin),freq=0,duty=0)
 48 | E=engines(machine)
 49 | try:
 50 |     import usocket as socket
 51 | except:
 52 |     import socket
 53 | CONTENT = b"""\
 54 | HTTP/1.0 200 OK
 55 | Hello #%d
 56 | """
 57 | CONTENT = b"""\
 58 | HTTP/1.0 200 OK
 59 | Content-Type: text/html\n\r
 60 | <html>
 61 |   <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js" type="text/javascript" charset="utf-8">
 62 |   </script>
 63 | <head>
 64 | <script type="text/javascript">
 65 | var DEVICE_URL = 'http://%s'
 66 | function iotAction(action){
 67 |     if(action=='change_led'){
 68 |         if(document.getElementById('led_value').value==1){
 69 |             action='led_off'
 70 |             document.getElementById('led_value').value=0
 71 |             document.getElementById('led_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/alarm_off.jpg')"
 72 |         }else if(document.getElementById('led_value').value==0){
 73 |             action='led_on'
 74 |             document.getElementById('led_value').value=1
 75 |             document.getElementById('led_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/alarm_on.jpg')"
 76 |         }else{
 77 |             action="led_on"
 78 |         }
 79 |     }
 80 |     if(action=='change_light'){
 81 |         if(document.getElementById('light_value').value==1){
 82 |             action='light_off'
 83 |             document.getElementById('light_value').value=0
 84 |             document.getElementById('light_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_off.jpg')"
 85 |         }else if(document.getElementById('light_value').value==0){
 86 |             action='light_on'
 87 |             document.getElementById('light_value').value=1
 88 |             document.getElementById('light_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_on.jpg')"
 89 |         }else{
 90 |             action="light_on"
 91 |         }
 92 |     }
 93 |     var requestURL = DEVICE_URL + "/?action="+action
 94 |     $.get (requestURL)
 95 | }
 96 | </script>
 97 | <style>
 98 | #container{
 99 |     width:800px;
100 |     height:1300px;
101 |     background-image:url("https://raw.githubusercontent.com/dgolak/esp8266/master/images/navi2.png");
102 |     background-position:40px 110px;
103 |     background-size:720px;
104 |     background-repeat: no-repeat;
105 |     -webkit-user-select: none;
106 |     padding-top:100px;
107 | }
108 | button{
109 |     background-color:transparent;
110 |     border-color:transparent;
111 |     border:0px solid red
112 | }
113 | </style>
114 | </head>
115 | <center>
116 | <div id="container">
117 | <table cellpadding="0" cellspacing="0">
118 | <tr>
119 | <td style="padding-left:130px;" colspan="3">
120 | <button style="width:440px;height:150px" ontouchstart="iotAction('forward')" ontouchend="iotAction('stop')"/>
121 | </td>
122 | </tr>
123 | <tr>
124 | <td><button style="width:180px;height:190px" ontouchstart="iotAction('left_up')" ontouchend="iotAction('stop')"/></td>
125 | <td rowspan="2"><button style="width:350px;height:370px" ontouchstart="iotAction('stop')" ontouchend="iotAction('stop')"/></td>
126 | <td><button style="width:180px;height:190px" ontouchstart="iotAction('right_up')" ontouchend="iotAction('stop')"/></td>
127 | </tr>
128 | <tr>
129 | <td><button style="width:180px;height:220px" ontouchstart="iotAction('left_down')" ontouchend="iotAction('stop')"/></td>
130 | <td><button style="width:180px;height:220px" ontouchstart="iotAction('right_down')" ontouchend="iotAction('stop')"/></td>
131 | </tr>
132 | <tr>
133 | <td style="padding-left:130px;" colspan="3">
134 | <button style="width:440px;height:150px" ontouchstart="iotAction('backward')" ontouchend="iotAction('stop')"/>
135 | </td>
136 | </tr>
137 | </table>
138 | <br/><br/>
139 | <table>
140 | <tr>
141 | <td>
142 | <input type="hidden" id="light_value" value="0"/>
143 | <button id="light_control" style="width:200px;height:200px;background-image:url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_off.jpg');background-size:200px;"" ontouchstart="iotAction('change_light')"></button>
144 | </td>
145 | <td>
146 | <input type="hidden" id="led_value" value="0"/>
147 | <button id="led_control" style="margin-left:20px;width:200px;height:200px;background-image:url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/%s');background-size:200px;"" ontouchstart="iotAction('change_led')"></button>
148 | </td>
149 | </tr>
150 | </table>
151 | </div>
152 | </center>
153 | </html>
154 | """
155 | 
156 | def main(E,micropython_optimize=False):
157 |     s = socket.socket()
158 |     ai = socket.getaddrinfo("172.20.10.10", 80)
159 |     addr = ai[0][-1]
160 |     s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
161 |     s.bind(addr)
162 |     s.listen(5)
163 |     while True:
164 |         res = s.accept()
165 |         client_sock=res[0]
166 |         if not micropython_optimize:
167 |             client_stream = client_sock.makefile("rwb")
168 |         else:
169 |             client_stream = client_sock
170 |         req = client_stream.readline()
171 |         get = req.split()[1].decode('utf-8')
172 |         if get == '/?action=forward':
173 |             E.forward()
174 |         elif get == '/?action=left_up':
175 |             E.left_up()
176 |         elif get == '/?action=right_up':
177 |             E.right_up()
178 |         elif get == '/?action=left_down':
179 |             E.left_down()
180 |         elif get == '/?action=right_down':
181 |             E.right_down()
182 |         elif get == '/?action=backward':
183 |             E.backward()
184 |         elif get == '/?action=stop':
185 |             E.stop()
186 |         elif get == '/?action=led_on':
187 |             led.on()
188 |         elif get == '/?action=led_off':
189 |             led.off()
190 |         elif get == '/?action=light_on':
191 |             light_l.on()
192 |             light_r.on()
193 |         elif get == '/?action=light_off':
194 |             light_l.off()
195 |             light_r.off()
196 |         else:
197 |             pass
198 |         while True:
199 |             h = client_stream.readline()
200 |             if h == b"" or h == b"\r\n":
201 |                 break
202 |         if led.value() == 1:
203 |             led_icon="alarm_on.jpg"
204 |         else:
205 |             led_icon = "alarm_off.jpg"
206 |         client_stream.write(CONTENT % (wlan.ifconfig()[0],led_icon))
207 |         client_stream.close()
208 |         if not micropython_optimize:
209 |             client_sock.close()
210 | main(E)
211 | 


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