1-Wire tester

Uses Arduino Pro Mini, Arduino Nano or similar, with ATmega328P.

LCD is HD44780, 2-line.

Pinout

• D2 - RS
• D3 - R/W
• D4 - E
• D5..D8 - DATA4..7
• D9 - 1-Wire data, 4k7 pullup to 5V

HD44780 connection

• GND
• +5
• contrast (potentiometer +5 - GND)
• RS
• R/W
• E
• D0-D3 ... to GND
• D4-D7 ... communication

Usage

Everything is automatic, just connect 1-Wire devices to the data pin.

ROM code reading works in parasitic mode, but temperature measurement is implemented only in 3-wire mode.