WiFi Internet of Things Learning Kit for Learn Coding with Arduino IDE 6: Servo motor

Post Time: 2020-05-30 13:05:07 Category: OSOYOO Wifi IoT Learning Kit

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- - Objective
  - Parts and Devices
  - How to make
  - How to code
  - How to play
  - Result
In previous lessons, we have showed how to use web browser to access Board through Internet. In these examples, we used a protocol called HTTP.
In this lesson, we will teach you to UDP protocol again. We will use a cell phone APP to control the rotation angle of a servo motor.
- OSOYOO Basic board x 1
- OSOYOO ESP8266 WIFI Shield x 1
- servo motor SG90 x 1
- USB cable x 1
- Jumper wires several
First, please insert the ESP8266 wifi Shield into your mainboard,
Make sure jumper cap connected E_TX to D4 and E_RX to D5.Connect the servo motor SG90 with mainboard as following diagram:

OSOYOO basic board Servo Wire

GND Brown

3.3V RED

D9 Orange

Step A) Install latest IDE from https://www.arduino.cc/en/Main/Software?setlang=en. If you have IDE version after 1.1.16, please skip this step).

Step B) Download PWMServo library zip file from https://osoyoo.com/driver/sg90car/PWMServo.zip

Then in your IDE ->Sketch->Include Library->Add .ZIP Library and select these two zip files you just downloaded, and upload it to IDE.

Step C) Connect the OSOYOO Basic board to computer via USB cable,

Step D) Open the IDE and choose corresponding board type and port type for you project.
- Board:”Arduino/Genuino UNO”
- Port: Choose your own Serial Port for your mainboard
Step E) Download sample code from

https://osoyoo.com/driver/wifi-iot/lesson6/wifi-lesson6.zip

unzip the file and double click the wifi-lesson6.ino file, find following lines:
```
char ssid[] = "******"; // your network SSID (name)
char pass[] = "******"; // your network password
```
```
please replace the ****** with your correct wifi SSID and password, otherwise your project can
 not connect to Internet.
```
Step F) After change above lines, load the sketch into IDE.

Step G)Open your Serial Monitor, you can see your router will assign an IP address to your IDE as following:
In above result, you can see my IP address is 192.168.1.81, UDP port 8888 , we will put this IP in Cell Phone APP Setting in next step .

Step H) Open your OSOYOO IOT UDP Robot APP , If you haven’t installed this APP, please read APP installation section in Lesson 2

Step I)Make sure your Cell phone is in the same Local Network of Arduino. Open the APP, click Settings, enter your Arduino IP address from Step F and Port to 8888 in settings:
Step J) Now in APP UI screen. Move the top Slider, you can move the top Slider from left to right, servo will rotate from 0 degree to 180 degree.

FAQ about the WIFI UDP APP and sketch Code:
Q 1)What happened when you press buttons in OSOYOO WiFi UDP Robot Car APP ?

Q2: How do react to App command

You can see the comments in above code and understand the control logic.

Learn More about parts

No.	Picture	Product Name	Link
1		OSOYOO basic board	https://osoyoo.store/products/osoyoo-uno-r3-for-arduino?variant=31955265290351
2		OSOYOO WIFI shield	https://osoyoo.store/products/esp8266-wifi-shiled-osoyoo-wifi-internet-of-things-learning-kit-for-arduino-uno?variant=31955252215919
3		Photoresistor Sensor Module	https://osoyoo.store/products/photoresistor-sensor-module-light-detection-digital-switch-mete-for-arduino?variant=31955271057519
4		Water Level Detection Sensor	https://osoyoo.store/products/rain-water-level-sensor-module-detection-liquid-surface-depth-height-for-arduino?variant=31955273810031
5		Sound Detection Sensor Module	https://osoyoo.store/products/high-sensitivity-sound-microphone-sensor-detection-module-for-arduino-avr-pic?variant=31955278921839
6		Ultrasonic sensor	https://osoyoo.store/products/hc-sr04-ultrasonic-sensor-module-for-arduino?variant=31957815558255
7		Servo motor	https://osoyoo.store/products/sg90-micro-servo-for-arduino-raspberry-pi-robot?variant=31957821096047
8		Active Buzzer Module	https://osoyoo.store/products/buzzer-sensor-module-for-esp8266-iot-kit?variant=31955947225199
9		Temperature&Humidity Sensor	https://osoyoo.store/products/dht11-temperature-humidity-sensor-module-for-arduino?variant=31955953221743
10		Relay Module	https://osoyoo.store/products/single-channel-relay-module-for-arduino-raspberry-pi?variant=31955954401391
11		Gas Sensor Module	https://osoyoo.store/products/mq-2-smoke-sensor-for-arduino?variant=31955955417199
12		Digital Barometric Pressure Sensor Module	https://osoyoo.store/products/bmp180-high-precision-pressure-sensor-for-arduino?variant=31957739339887
13		Infrared Sensor Module	https://osoyoo.store/products/hc-sr501-pir-motion-sensor-for-arduino?variant=31957812838511
14		LED(6 x White, 6 x Red, 6 x Yellow, 6x Green)	https://osoyoo.store/products/led-packs-for-arduino?variant=31957816442991