User Tutorial

Hardware Preparation

• DS1307 RTC Module with Battery for Raspberry Pi (Compatible with Raspberry Pi 4B)
• Rasperry pi(4B)

Software Preparation

• Raspberry Pi OS

Wiring Diagram

• Connect the module to your Pi

• The module leads to the TX&RX pins, you could set the information via this port.

Usage steps

• Open Raspberry Pi I2C interface

command: sudo raspi-config

• Select "Advanced Options"

• Select "I2C"

• Select "YES"

• add the module

command: sudo vim.tiny /etc/modules

• Add "i2c-dev" device

• Install I2C tools

command: sudo apt-get install i2c-tools

• Input "sudo reboot" to reboot Raspberry Pi; Input "sudo i2cdetect-y1" after a reboot. If everything goes well, the module will be detected normally.

command: sudo reboot
command1: sudo i2cdetect-y 1

• Input "sudo su--" to get "root"; input "modprobe i2c-dev" to load I2C device.

command: sudo su
command1: modprobe i2c-dev

• load to Raspberry Pi system I2C device.

command: echo "ds1307 0x68" \>/sys/class/i2c-adapter/i2c-1/new_device

• Now you can use "hwclock" command to use this module, refer to "man hwclock" for more details.

command: sudo hwclock -r Get RTC module time
command1: sudo hwclock -w Set system time