Raspberry Pi IP Address Display

A hardware add-on that displays your Raspberry Pi's IP address on a 3-digit 7-segment LED display. Compatible with all Raspberry Pi models and other pin-compatible SBCs (Orange Pi, Banana Pi, Odroid, etc.).

Quick Start

1. Enable I2C and SPI: sudo raspi-config → Interface Options
2. Install: sudo apt install python3-smbus i2c-tools (or pip install smbus2)
3. Run: python3 hostip.py
4. Auto-start at boot: ./deploy-to-pi.sh --install-service (after deploying)

See docs/SETUP.md for the full setup guide, including ATtiny88 programming and the reset pin requirement.

Hardware

• Board: ATtiny88 drives a 3-digit ELT-316 common-anode 7-segment display
• Communication: I2C at address 0x5A
• Size: Sits 0.6" (1.5cm) above the Pi; total height ~1" (2.5cm) with headers
• Expansion: P3 (left) and P4 (right) connectors bring out Port C & D (ADC, analog comparator, external interrupts)

Features

• Power-on message ("rPI IP by JAY v1.1 GPL 3")
• Timeout message if no IP received within ~5 minutes
• Cycles through IP octets (e.g., 192 → 168 → 1 → 100)

Climate node (DHT22, standalone)

The board can run without a Pi as a temperature/humidity display using a DHT22 on header P3 pin 1 (PC0).

• Firmware: climate-node-dht22/
• Setup, wiring, build, and flash: docs/CLIMATE_NODE.md

Shows °F (e.g. 78.3) and humidity (e.g. H38), one sensor read every 6 seconds (3 s per value on the display).

Documentation

• Setup Guide — Pi IP display: installation, configuration, and flashing
• Climate Node (DHT22) — Standalone temp/humidity firmware
• Releases — Pre-built binaries and documents
• Schematic