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 shown how to use a web browser to access a board through the internet. In these examples, we used a protocol called HTTP.
In this lesson, we will teach you how to use the 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 Wi-Fi Shield x 1
- servo motor SG90 x 1
- USB cable x 1
- Jumper wires several
First, please insert the ESP8266 Wi-Fi Shield into your mainboard.
Make sure the jumper cap is connected from E_TX to D4 and E_RX to D5.
Connect the servo motor SG90 with the mainboard as shown in the following diagram:

OSOYOO basic board Servo Wire

GND Brown

3.3V RED

D9 Orange

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

Step B) Download the PWMServo library zip file from https://osoyoo.com/driver/sg90car/PWMServo.zip. Then in your IDE ->Sketch->Include Library->Add .ZIP Library and select the two zip files you just downloaded, and upload them to the IDE.

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

Step D) Open the IDE and choose the corresponding board type and port type for your project:
- Board:”Arduino/Genuino UNO”
- Port:Choose your own serial port for your mainboard.
Step E) Download the 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 the following lines:
```
char ssid[] = "******"; // your network SSID (name)
char pass[] = "******"; // your network password
```
```
Please replace the ****** with your correct Wi-Fi SSID and password; otherwise, 
your project cannot connect to the internet.
```
Step F) After changing the above lines, load the sketch into the IDE.

Step G) Open your serial monitor. You can see that your router will assign an IP address to your IDE as follows:
In the above result, you can see that my IP address is 192.168.1.81, UDP port 8888. We will put this IP in the cell phone app settings in the next step.
Step H) Open your OSOYOO IOT UDP Robot app. If you haven’t installed this app, please read the APP installation section in Lesson 2.
Step I) Make sure your cell phone is on the same local network as the Arduino. Open the app, click settings, enter your Arduino IP address from step G, and set the port to 8888 in the settings.
Step J) Now, in the app UI screen, move the top slider. You can move the top slider from left to right, and the servo will rotate from 0 degrees to 180 degrees.

FAQ about the Wi-Fi UDP app and sketch code:
Q1) What happens when you press buttons in the OSOYOO Wi-Fi UDP Robot Car app?

Q2) How do you react to app commands?

You can see the comments in the 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 Wi-Fi 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