The following  code can be downloaded to your raspberry pi and run to get the date, time and IP address of your machine on the LCD display.

The Code

# SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
# SPDX-License-Identifier: MIT
# Modified by Jonathan Seyfert, 2022-01-22
# to keep code from crashing when WiFi or IP is unavailable
from subprocess import Popen, PIPE
from time import sleep, perf_counter
from datetime import datetime
import board
import digitalio
import adafruit_character_lcd.character_lcd as characterlcd

# Modify this if you have a different sized character LCD
lcd_columns = 16
lcd_rows = 2

# compatible with all versions of RPI as of Jan. 2019
# v1 - v3B+
lcd_rs = digitalio.DigitalInOut(board.D22)
lcd_en = digitalio.DigitalInOut(board.D17)
lcd_d4 = digitalio.DigitalInOut(board.D25)
lcd_d5 = digitalio.DigitalInOut(board.D24)
lcd_d6 = digitalio.DigitalInOut(board.D23)
lcd_d7 = digitalio.DigitalInOut(board.D18)

# Initialise the lcd class
lcd = characterlcd.Character_LCD_Mono(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6,
                                      lcd_d7, lcd_columns, lcd_rows)

# looking for an active Ethernet or WiFi device
def find_interface():
#    dev_name = 0 # sets dev_name so that function does not return Null and crash code
    find_device = "ip addr show"
    interface_parse = run_cmd(find_device)
    for line in interface_parse.splitlines():
        if "state UP" in line:
            dev_name = line.split(':')[1]
            return dev_name
    return 1 # avoids returning Null if "state UP" doesn't exist

# find an active IP on the first LIVE network device
def parse_ip():
    if interface == 1: # if true, no device is in "state UP", skip IP check
        return "not assigned " # display "IP not assigned"
    ip = "0"
    find_ip = "ip addr show %s" % interface
    ip_parse = run_cmd(find_ip)
    for line in ip_parse.splitlines():
        if "inet " in line:
            ip = line.split(' ')[5]
            ip = ip.split('/')[0]
            return ip # returns IP address, if found
    return "pending      " # display "IP pending" when "state UP", but no IPv4 address yet

# run unix shell command, return as ASCII
def run_cmd(cmd):
    p = Popen(cmd, shell=True, stdout=PIPE)
    output = p.communicate()[0]
    return output.decode('ascii')

# wipe LCD screen before we start

# before we start the main loop - detect active network device and ip address
# set timer to = perf_counter(), for later use in IP update check
interface = find_interface()
ip_address = parse_ip()
timer = perf_counter()

while True:
    # check for new IP addresses, at a slower rate than updating the clock
    if perf_counter() - timer >= 15:
        interface = find_interface()
        ip_address = parse_ip()
        timer = perf_counter()

    # date and time
    lcd_line_1 ='%b %d  %H:%M:%S\n')

    # current ip address
    lcd_line_2 = "IP " + ip_address

    # combine both lines into one update to the display
    lcd.message = lcd_line_1 + lcd_line_2


Download the Code

Let's put this file right in your home directory for simplicity. The wget command makes things easy.


Running the Code

The following command will start the program and you should see the LCD display come to life with date, time and IP address.

sudo python3 ./

This guide was first published on Aug 17, 2012. It was last updated on Dec 01, 2023.

This page (Python Script) was last updated on Dec 01, 2023.

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