Low‑Power Raspberry Pi Zero E‑ink Dashboard for Real‑Time Transit, Weather, and More

Overview

During my work as a software engineer, I realized how valuable real‑time information can be when it is delivered directly to the wall. Using a Raspberry Pi Zero W and an e‑ink display, I created a dashboard that pulls data from multiple APIs—transit schedules, weather forecasts, calendars, and more—and renders it as a low‑power, always‑on visual.

Why e‑ink?

Unlike LCD panels, e‑ink displays consume only microamps when idle, allowing the device to run for months on a single 3 V battery. This makes it ideal for a wall‑mounted system that updates only a few times per hour.

Initial Build (V 1.0)

The first prototype included:

• Transit module: 4 nearby stops with two upcoming times each.
• Weather module: current conditions and a two‑day forecast.
• Monthly calendar view.

After sharing the design with Raspberry Pi communities, I received suggestions for additional features such as a Google‑Sheets‑based task list. Implementing that required integrating Google Cloud credentials and the google-api-python-client library.

Feature Expansion (V 1.5)

With a solid foundation, I added several new modules:

• Currency converter for five user‑selected currencies plus Bitcoin and Ethereum.
• Stock ticker for five user‑selected equities.
• News headlines: five local titles and five from selected feeds, refreshed every 15 minutes.
• Google Meetings: upcoming calendar events from a user’s Google Calendar.

Version 2.0 and Beyond

Version 2.0 incorporated all previous modules and introduced additional tuning for display refresh rates and power management. A small, lightweight Flask web interface now lets users update API keys and preferences without editing code. The application runs under Gunicorn, with Nginx handling static assets and reverse‑proxying.

Technical Highlights

• Python 3.11, requests for HTTP calls, Pillow for PNG generation.
• e‑Paper Hat driver from Waveshare for low‑latency updates.
• JSON‑based configuration file, editable via the web UI.
• Deployment: Raspberry Pi Zero W → Gunicorn → Nginx → Web UI.

Overall, the project demonstrates how a modest single‑board computer can transform a wall into a personal information hub that respects battery life and visual clarity.

Source: E‑ink Dashboard