Network node new in 3.1

Letter Post

Public messages, one shot each: an audience chat, a wall of wishes, a karaoke queue, subtitles a sentence at a time. Messages come from a WebSocket Client’s Connection (any JSON — field names in Settings — or plain text) or from Text In: Send When picks Text Change (every new Text In is a message; typed by hand, on Return) or Manual (only on Send — a cable or the Inspector button). A Text Guard’s Guard checks each one; the server’s messages wait until one is cabled with rules, Text In goes on unchecked while no Guard is cabled. A message takes a free slot, appears for Born seconds, stays Read seconds and leaves in Flight; then Delivered pulses with Delivered Text and Signature. Deliveries keep Min Gap apart; when messages pile up, Read shortens towards Min Read, reached when Queue for Min Read messages are waiting (Pressure 0…1 shows how close). Mode: Off (they wait), Live, or Demo (prepared messages from a file, about every Demo Every seconds; real ones first). Panic hides every message (they return to the queue): a short press toggles, a switch held on holds it. Letters is the list for a drawing node; Log Row is ready for CSV Log. With Server Receipts (Settings) the server is told each message’s state and its presence Code comes out on Code, Code Left and Code Bar.