1-Wire tester, shows ROM code and temperature on an LCD screen
Ondřej Hruška fcdb66d53a
add checksum verifications
11 months ago
lib initial code, working LCD 11 months ago
.gitignore initial code, working LCD 11 months ago
CMakeLists.txt working, tested original DS1820 11 months ago
Makefile working, tested original DS1820 11 months ago
README.md add hd44780 pinout info 11 months ago
lcd.c initial code, working LCD 11 months ago
lcd.h initial code, working LCD 11 months ago
main.c add checksum verifications 11 months ago
onewire.c added 18B20 and iButton support 11 months ago
onewire.h added 18B20 and iButton support 11 months ago
style.astylerc initial code, working LCD 11 months ago

README.md

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.