Creative Pen Holder Weather Forecast Using Arduino

_{Creative Pen Holder – Weather Forecast}

_{Difficulty Level: ⭐⭐⭐}Suitable Age:12 years and above

_{Programming Software: Arduino IDE + USART HMI}

_{This Issue’s Benefit}

Leave comments at the bottom of the article, invite friends to like, and the top eight with the most likes within the specified time will win the following prizes.

Top 1-8: A complete material package for the creative pen holder

Activity Deadline: September 21, 2020, 5:30 PM

_Introduction

Isn’t it just an ordinary pen holder? What makes it special? Please listen to my explanation

Creative Pen Holder Weather Forecast Using Arduino

Features: Network time acquisition, goodbye to manual time calibration, display today’s and tomorrow’s weather information, real-time detection and display of indoor temperature and humidity

And the most important point, it can be used as a pen holder

. A desktop ornament is definitely needed

Data source for the work: Xinzhi Weather, Alibaba Cloud

_{Materials Preparation}

_{ESP8266 Main Control Board —– 1 piece}

_{DHT11 Temperature and Humidity Sensor —– 1 piece}

_{2.2-inch TFT Serial Screen —– 1 piece}

_{12*12*7 Button —– 2 pieces}

_{10K Resistor —– 1 piece}

_{Wires —– Several}

Kit Purchase

_{Module Explanation}

ESP8266 Main Control Board：This is a WiFi-supported main control board, responsible for acquiring network weather data and network timing, as well as processing data from the DHT11 temperature and humidity sensor.

DHT11 TemperatureHumidity Sensor：Real-timeacquisition of indoor temperature and humidity information, special note: DHT11 is only suitable for use in southern regions (can only detect temperatures above zero, please replace with DHT22 in northern regions).

2.2-inch TFTSerialScreen：Responsible for displaying various parameter information, using serial communication; since the screen is only for data display, only TX-RX is required.

_{Wiring Diagram}

Click to view the high-definition image

_{Production Process}

1. Structural parts – laser cutting (partially)

2. Use universal hot melt glue to fix the pen holder part

3. Fix the screen (during the process of removing the wiring seat, due to excessive force, the copper foil fell off) Note: The wiring seat must be removed; otherwise, the screen cannot be installed properly in the subsequent steps.

4. Installation of the screen

5. Fix the wooden board for the USB charging port

6. Use universal hot melt glue to fix the ESP8266 main control board; before this, the pins of the ESP8266 need to be broken off, otherwise it will be too high

7. Complete the circuit setup according to the wiring diagram; since the ESP8266 generates heat during operation, students can try placing the DHT11 temperature and humidity sensor on the back of the pen holder; otherwise, it will be like mine, with outdoor temperatures of 23°C and indoor temperatures of “32°C”.

8. The download of the ESP8266 program will not be introduced here; I believe students can do it (if not, scan the QR code at the bottom, and we will communicate one-on-one), here we will focus on the program download for the screen (What? The program also needs to download a program).

1. Open the USART HMI software, which is available in the net disk below, and then open the Demo.HMI file.

2. In the upper left corner of the software interface, sequentially open File – Output Production File – Set File Save Path, click Output, and wait a moment.

3. A Demo.tft file will be compiled in the file save path; prepare a blank TF card and copy this file into it (it’s recommended that there are no files on the TF card).

4. Power off the screen, insert the TF card into the slot on the back of the screen, and then power on; it will automatically enter the update program interface and automatically copy the files from the TF card to the Flash memory. The storage space is 4M, i.e., 4096Kb, and the available memory is 3584Kb; therefore, your project file should not exceed this, otherwise, the program will not download. After the update, the screen will display the Success prompt, and you can power off and remove the TF card; powering on again will load the new downloaded file.

Additionally, the program for the screen will not be specifically introduced here; students can learn from the official materials provided. Screen material center: http://wiki.tjc1688.com

———-Separator———-

9. The following part is for network configuration functionality; due to time constraints, this function is still in its infancy and will be updated later. The hardware part will be completed

. One button function is reset, and the other is network configuration (make a pull-down resistor circuit).

Network configuration method: Press the network configuration button, then press the reset button, connect your phone to the ESP8266 WiFi, enter 192.168.5.1 in the browser, fill in the data based on the webpage information, click save, and press the reset button again to restart, thus enabling online modification of WiFi information and city information.

10. Build the circuit for the two buttons according to the wiring diagram.

_Program

Parts that need modification: Very important

Due to the use of the free version of the data, the data that can be obtained is limited; however, it is fully sufficient for personal use. It is recommended to register your own account and modify the key, as shown in the figure below:

For other parts, please check the program slowly

. Key parts are commented. If you have any questions, we can communicate privately

Note: Online network configuration and more functions will be updated later; there is no need to modify the program each time. Please pay attention to the updates of the net disk content.

_{Work Appreciation}