espFOTA: An OTA (Over-the-Air) update library for ESP8266, ESP32, and other devices supporting MicroPython.

espFOTA is an Over-the-Air (OTA) update library for MicroPython devices such as ESP8266, ESP32, and other supported hardware. This library simplifies the process of updating firmware over a Wi-Fi connection, ensuring your devices are always up-to-date.

• Features
• Installation
• Usage
  • Setup
  • Network Status Indicator
  • Automatic Update Check
• Example Node.js Server
• Important Notes

• Easy configuration for OTA updates.
• Automatic Wi-Fi connection management.
• Continuous update checks with automatic application of updates.
• Network status indicator using GPIO pin.

Py-file

import mip
mip.install('github:raghulrajg/espFOTA/espFOTA.py')

To install using mpremote

    mpremote mip install github:raghulrajg/espFOTA

To install directly using a WIFI capable board

    mip.install("github:raghulrajg/espFOTA")

If you want to install library examples:

    mpremote mip install github:raghulrajg/espFOTA/examples.json

To install directly using a WIFI capable board

    mip.install("github:raghulrajg/espFOTA/examples.json")

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/micropython-espFOTA/>_. To install for current user:

    pip3 install micropython-espFOTA

To install system-wide (this may be required in some cases):

sudo pip3 install micropython-espFOTA

To install in a virtual environment in your current project:

    mkdir project-name && cd project-name
    python3 -m venv .venv
    source .env/bin/activate
    pip3 install micropython-espFOTA

Also see examples.

1. Wi-Fi and Server Configuration:

   • SSID: Your Wi-Fi network name.
   • Password: Your Wi-Fi network password.
   • host: The server endpoint where the update file is hosted.

2. Example Program:

   Save the following code in a file named main.py on your MicroPython device:

   import espFOTA
   
   # Avoid the GPIO pin number 2 because of predefine pin (Network status indicator)
   
   # Server connection config
   host = "package.xyz.com/newversion"
   
   # WiFi Network connection config
   SSID = "YOUR_APN_NAME"
   Password = "YOUR_APN_PASSWORD"
   
   OTAUpdate = espFOTA.espFOTA(SSID, Password, host)
   
   def loop():
       while True:
           # Put your code here
           OTAUpdate.run()
   
   if __name__ == '__main__':
       loop()

   • SSID: Replace with your Wi-Fi network name.
   • Password: Replace with your Wi-Fi network password.
   • host: Replace with your server's URL endpoint where the OTA update file is hosted.

• The device uses GPIO pin 2 as a network status indicator.
• If the Wi-Fi network is not connected, the LED on GPIO pin 2 will turn on.
• Once the Wi-Fi is connected, the LED will turn off.

• The OTAUpdate.run() method continuously checks for updates from the specified host.
• If an update is found, it is automatically downloaded and applied.
• The device will restart to apply the new firmware.

To serve the OTA update file, you can set up a simple Node.js server. Here is an example:

const http = require('http');
const url1 = require('url');
const fs = require('fs');

const server1 = http.createServer((req, res) => {
  const parsedUrl = url1.parse(req.url, true);
  const pathname = parsedUrl.pathname;
  if (pathname === '/download') {
    const filePath = `filepath/ota.py`;  // Path to your OTA update file

    // Send the bin file to esp32
    serveFile(res, filePath);
  } else {
    res.writeHead(404, { 'Content-Type': 'text/plain' });
    res.end('Not found');
  }
});

function serveFile(res, filePath) {
  const stat = fs.statSync(filePath);
  const fileStream = fs.createReadStream(filePath);
  res.writeHead(200, {
    'Content-Type': 'application/octet-stream',
    'Content-Length': stat.size,
    'Content-Disposition': 'attachment; filename=' + "ota.py"
  });
  console.log(stat.size);
  fileStream.pipe(res);
  console.log("Downloaded");
  fs.unlinkSync(filePath); 
}

server1.listen(3000, () => {
  console.log('Server listening on port 3000');
});

• Save the above code in a file, e.g., server.js.
• Ensure you have Node.js installed.
• Run the server using the command: node server.js.

• The server listens on port 3000. The OTA update file should be accessible at http://<server-ip>:3000/download.

• File Naming: The example program file name must be main.py on your MicroPython device.
• Wi-Fi and Host Configuration: Ensure that the SSID, Password, and host variables are correctly set to match your network and server configurations.
• Update Check Frequency: The OTAUpdate.run() method continuously checks for updates. Adjust the frequency or conditions within the loop function as needed.