DIY Projects Home automation, connected objects (IoT) and DIY projects based on Arduino, ESP8266, ESP32, mini PC (Raspberry Pi, Orange Pi) and 3D printing
 |
 |
The ArduinoOTA library is a library that allows to update the Arduino program (and ESP3226, ESP32) wirelessly in Wi-Fi. It is an essential library when developing connected objects. It allows to update the program without having to disassemble the microcontroller (Arduino, ESP8266, ESP32) to connect it to his computer. This library was originally developed to update the Arduino programs, it is perfectly supported by the ESP8266 and ESP32. For this tutorial, we will only address the case of ESP8266.
Install the ArduinoOTA library for ESP8266 on the Arduino IDE
The ArduinoOTA library is integrated into the ESP8266 library. There is nothing more to install. If you’re new to ESP, here’s how to install the ESP library and support. Open the preferences (from the Arduino menu) and add to the list of packages this one
|
1 |
http://arduino.esp8266.com/stable/package_esp8266com_index.json |
Then go to the map manager and look for esp8266, then click install.
After installation, new examples have been added to the sample menu. Select your ESP8266 card to display the available samples. Open the BasicOTA example in the ArduinoOTA submenu
This program contains everything you need to manage wireless upgrade in your ESP projects.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 |
#include <ESP8266WiFi.h> #include <ESP8266mDNS.h> #include <WiFiUdp.h> #include <ArduinoOTA.h> const char* ssid = ".........."; const char* password = ".........."; void setup() { Serial.begin(115200); Serial.println("Booting"); WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); while (WiFi.waitForConnectResult() != WL_CONNECTED) { Serial.println("Connection Failed! Rebooting..."); delay(5000); ESP.restart(); } // Port defaults to 8266 // ArduinoOTA.setPort(8266); // Hostname defaults to esp8266-[ChipID] ArduinoOTA.setHostname("Demo OTA ESP8266"); // No authentication by default ArduinoOTA.setPassword((const char *)"123"); ArduinoOTA.onStart([]() { Serial.println("Start"); }); ArduinoOTA.onEnd([]() { Serial.println("\nEnd"); }); ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) { Serial.printf("Progress: %u%%\r", (progress / (total / 100))); }); ArduinoOTA.onError([](ota_error_t error) { Serial.printf("Error[%u]: ", error); if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed"); else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed"); else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed"); else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed"); else if (error == OTA_END_ERROR) Serial.println("End Failed"); }); ArduinoOTA.begin(); Serial.println("Ready"); Serial.print("IP address: "); Serial.println(WiFi.localIP()); } void loop() { ArduinoOTA.handle(); } |
Before reversing the program, change the ssid variables (Wi-Fi network to which to connect) and password (password).
Here, the program uses the ESP8266WiFi library to connect to the network. You can also use the WiFiManager library presented earlier.
Once the connection is established, it is possible to define additional (optional) parameters:
- SetPort: by default the communication port is 8266. It is not very useful to change it unless it is already in use. For example, for a project integrating UDP communication.
- SetHostname: This is probably the most important option. It allows you to assign a name to the ESP8266. If you have a lot of objects on your network, it will be much easier to identify it by name than by an identifier built automatically from the serial number.
- SetPassword: used to request a password from the Arduino IDE before running an update. Practice if you work at several or in a school.
There are four other ways to connect treatments in the following cases:
- OnStart: code to run when the update is started
- OnEnd: idem at the end
- OnProgress: during the progress
- OnError: and on error
You will not need to add treatments in most cases. In particular, these functions allow us to remain informed of the smooth running of operations.
At the end of the setup, once all functions have been defined, start the wireless update support by calling the begin () method.
Finally, for everything to work, it is necessary to call the ArduinoOTA.handle () method in the loop () loop.
Wireless Update Test
Upload the program and open the Terminal to verify that the ESP8266 is properly connected to the Wi-Fi network.
The Arduino IDE automatically detects devices that support remote update. They are added to the list of ports in a new section called Network ports.
To update the program, simply select the ESP as the port instead of the usual serial port. Then upload the program as usual. Here, as a password is required, an input window appears in the IDE. It is requested only once
The remote update (or failure) of the remote update can be tracked directly from the Arduino IDE.
It is not possible to open the serial monitor with wireless setup. A small Web interface is required. Read this tutorial to learn how to add a Web server and HTML interface to an ESP8266 project. To go further, here is a series of articles dealing with the subject
- Unpacking the SONOFF 4CH PRO, 4 relays operated in WiFi & RF on DIN rail, test with the EWelink app 20 September 2017
- Recycle an old PC to make it a Linux home automation server, Arduino / ESP8266 development station 18 September 2017
- Wemos LoLin32 Lite, more compact revision of the LoLin32 to $4.90 17 September 2017
- ArduinoOTA ESP32: Wi-Fi (OTA) Wireless Update from the Arduino IDE 1 September 2017
- ArduinoOTA: Wireless Update (OTA) from the Arduino IDE of ESP8266 Programs 30 August 2017
- How to Include RFLink Radio Home Automation Devices at Home Assistant (HASS) 28 August 2017
- Activate the i2c bus of Raspberry Pi 3 or Pi Zero W 21 August 2017
- How to solder the Raspberry Pi Zero W GPIO connector 14 August 2017
- Install Jeedom v3 from the installation script on Raspberry Pi 3 (or Linux Debian 8 PC) 10 August 2017
- Deviot, the Sublime Text 3 PlatformIO package for PC recycled under 32-bit Linux 7 August 2017
- BH1750 (GY-302), measure the lighting quality of your home (Arduino / ESP8266 / ESP32) 31 July 2017
- Install the IDE PlatformIO extension for Visual Studio Code (VSCode): Windows, 32-bit Linux 28 July 2017
- Calculate the Air Quality Index (IAQ, IQA) with a DSM501 on Arduino or ESP8266 26 July 2017
- Getting start programming the ESP32 with the PlatformIO IDE 24 July 2017
- Install the Arduino IDE (1.8 or higher) on Linux (Ubuntu 16.04 or later) 21 July 2017
- Wemos LoLin32 Lite, more compact revision of the LoLin32 to $4.90
- ArduinoOTA ESP32: Wi-Fi (OTA) Wireless Update from the Arduino IDE
- ArduinoOTA: Wireless Update (OTA) from the Arduino IDE of ESP8266 Programs
- BH1750 (GY-302), measure the lighting quality of your home (Arduino / ESP8266 / ESP32)
- Getting start programming the ESP32 with the PlatformIO IDE
- First project Homie ESP8266: publish in MQTT measurements of a DHT22 probe
