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if (php_sapi_name() === 'cli') // Running from command line $command = "python3 " . escapeshellarg($pythonDriver) . " " . escapeshellarg($outputImage); echo "Executing: $command\n"; $output = shell_exec($command); echo $output; else // Running via Web Browser echo "Hardware trigger skipped (Run via CLI to update display).<br>"; echo "<img src='current_display.png' border='1'>";
// Fallback if fonts don't exist (Use default PHP font) if (!file_exists($fontBold)) $fontBold = 5; // Internal PHP font ID (1-5) epaper php script
We demonstrated that a well-structured PHP script can effectively drive e-paper displays for low-frequency dynamic content. The approach reduces development complexity compared to embedded C or Python, while maintaining adequate performance for signage and indicator applications. if (php_sapi_name() === 'cli') // Running from command
// 4. Save the image imagepng($image, $outputImage); imagedestroy($image); Save the image imagepng($image
// --- Configuration --- $displayWidth = 800; // Set your e-Paper width (e.g., 800x480 for 7.5inch) $displayHeight = 480; $outputImage = __DIR__ . '/current_display.png'; $pythonDriver = __DIR__ . '/epaper_driver.py'; // Path to your hardware driver
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