/*
Version:		V2.0
Author:			Vincent
Create Date:	2020/9/12
Update Date:	2021/2/7
Note：

2021/2/7 V2.0 :Add a general WIFI set funtion.
*/

[toc]

Described how to develop ESP32 under the Arduino IDE. For MakePython and ESP32 serial.

Includes:

• Install development board
• Install library
• Compile options
• Demo : Set WIFI

Arduino is supported in Espressif's products like ESP32. But need intall first.

• Open Arduino IDE

• Select "File", select "preferences".

• In the Preferences window, select "Additional Boards Manager URLs"

• Add url :

https://dl.espressif.com/dl/package_esp32_index.json

• Select "Tools", select "board", select "Boards Manager".

• Open Boards Manager as the screen snap below.

• Search “esp32” in "Boards Manager" and install it.

Most popular third-party libraries can be found in the library manager.For third-party libraries that are only uploaded to Github, you can install them by installing the ZIP library.You can also simply unzip to the Arduino library folder.

Arduino has its own library manager, and for some authenticated third-party libraries, it can be searched in the library manager. Click install. Common libraries such as SSD1306.

• Select "Tools", select "Manage Libraries"

• Search libraries which you need.

Some of the libraries downloaded manually or provided with the project will come with a ZIP archive.You can add it through the capabilities of the Arduino IDE's import ZIP library.

• Select "Skecth", select "Include Library", select "Add ZIP library..."

Or you can just unzip and copy the folder to the Arduino library folder.Usually the location is "C:\Users\yourname\Documents\Arduino\libraries".

Most projects provide detailed compilation options, depending on the project.

• You can choose ESP32 DEV in most cases, and the rest of the configuration takes the default.

• ESP32 WROVER has a large memory, so for projects with ESP32 Serial you can generally use this following compile options.

Just select port and push upload...

Make sure connect with USB cable.

We provide a header file and function for setting WIFI.

Code is in : /Makerfabs_FAQ/Arduino_ESP32/arduino_example/wifi_set_demo/

Chinese:

if ESP32开机检测SSID == NULL：
    ESP32通过AP模式，访问192.168.4.1进行修改，获得SSID和PASSWORD
    通过NVS存储到FLASH中
    重启
else：
    根据FLASH的SSID和PASSWORD连接wifi
    
while 重启五秒内 && 重置按键被按下 ：
    将NVS设置为NULL
    重启

if WIFI连接成功:1?0

用户程序()

English:

wifi_set_main():
	if check SSID == NULL：
	    ESP32 into AP method, Visit 192.168.4.1 to set SSID and PASSWORD
	    via NVS save to FLASH
	    ESP32 reboot
	else：
	    use SSID and PASSWORD in FLASH to connect wifi
	    
	while in 5s timeout && write WIFI_SET_PIN low：
	    set ssid in Flash to "NULL"
	    ESP32 reboot

	return  WIFI connect success:1?0

usercode()

• Upload Code to ESP32
• Push WIFI_SET_BUTTON or set WIFI_SET_PIN(21) to LOW.
• Then esp32 will reboot
• Check your phone, you will found an AP named "Makerfabs_ap"
• Connect it with your smartphone or PC.
• Visit 192.168.4.1, and a setting page will show.
• Use webpage set ssid and password, and it will auto reboot.
• And ESP32 will connect WIFI after reboot.