Create a paragraphs field programmatically

Here is another example that worked for me:

• Paragraph type: my_paragraph
• Paragraph field on node: field_paragraph_field
• Simple text field on paragraph entity: field_simple_text

$n = node_load(239);
$p = entity_create('paragraphs_item', array('bundle' => 'my_paragraph', 'field_name' => 'field_paragraph_field'));
$p->is_new = TRUE;
$p->setHostEntity('node', $n);
$p->field_simple_text[LANGUAGE_NONE][0]['value'] = 'what what';
$p->save();

Source: daggerhart