Learning Tai Chi Maker - esp8226 (XIII) OTA

Video link : https://www.bilibili.com/video/BV1L7411c7jw?p=23&vd_source=b91967c499b23106586d7aa35af46413

The data link ：http://www.taichi-maker.com/homepage/esp8266-nodemcu-iot/iot-c/esp8266-tips/esp8266-ota/

So-called OTA, Namely Over-The-Air Abbreviation . Someone translated it into “ Over the air ”, There are also translations for “ Space transmission ”. Anyway, translate , about ESP2866 Come on , adopt OTA We don't have to ESP8266 Connect to a computer , And just through WiFi You can use it Arduino IDE towards ESP8266 Upload program .

1 Upload the initial sample program through the data line

// An highlighted block
var foo = 'bar';

Program description ,

The main function of this program is to make ESP8266 On the development board LED Produce a flashing effect . The time interval of this flicker effect can be determined by a parameter in the program blinkInterval To set it up . besides , Also added OTA function .

Mainly talking about the... In this program OTA part ,

stay setup Function ,

// OTA Set up and start 
  ArduinoOTA.setHostname("ESP8266");
  ArduinoOTA.setPassword("12345678");
  ArduinoOTA.begin();

among ,ArduinoOTA.setHostname The function is used to enable the development board to implement OTA Give it a name , The name is in OTA Data transmission will see .

ArduinoOTA.setPassword The password() function sets the password , When we use OTA Function when uploading programs to the development board , Password authentication is required .

after , adopt ArduinoOTA.begin(); The development board will launch OTA function .

Last , stay loop Function ,

void loop() {
    
  ArduinoOTA.handle();
}

ArduinoOTA.handle(); Need to be called frequently , The purpose is to see if a computer sends a request for program upload to the development board .

Download the program to through the data cable ESP8266 In the after , Start the serial port monitor and have a look ,

2 Use OTA Function to upload the above sample program again

after , Disconnect the serial port cable , Power up the development board separately and restart Arduino IDE , then ,

Click the network port ,

Click upload .

then , Will appear

After entering the password ,（ If there's a firewall , Click on the confirmation ）

then , No need to restart the development board , You can directly see the running effect of the program .

3 OTA Functional limitations