Developer Builds Daily German Word WhatsApp Bot After Week of Automation Hurdles

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A developer set out to create a simple WhatsApp Channel that posts one German vocabulary word each morning, but the project quickly grew complex due to WhatsApp's session management challenges. The initially chosen library, whatsapp-web.js, required a full Chromium browser profile to maintain login sessions, making cloud deployment impractical and causing repeated authentication failures. Hosting platforms added further complications, with Railway banning userbot-style automations and Render suffering from unreliable session restoration bugs. The breakthrough came from switching to the Baileys library, which communicates with WhatsApp over a WebSocket without needing a browser, reducing session data from 43MB to a few small JSON files. This single change resolved both the hosting and session problems, allowing the bot to run reliably on a free-tier server with credentials stored in a MongoDB Atlas cluster.

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