EP-0059: Difference between revisions
Line 36: | Line 36: | ||
<br style="clear:both;" > | <br style="clear:both;" > | ||
---- | ---- | ||
== | ==How to Use:== | ||
**1.Software Requirement:Base Raspbian Operating System | **1.Software Requirement:Base Raspbian Operating System | ||
** [[File:Ds13073.png|thumb|left|200px]] | ** [[File:Ds13073.png|thumb|left|200px]] | ||
Line 73: | Line 72: | ||
save and reboot your RPi. | save and reboot your RPi. | ||
---- | ---- | ||
==How to Check it== | ==How to Check it== | ||
After reboot and log in, open a terminal and typing this command to check if RTC module is functional. | After reboot and log in, open a terminal and typing this command to check if RTC module is functional. |
Revision as of 16:57, 14 June 2016
DS1307 RTC Module with BAT for Raspberry Pi
Description
The RTC module is specifically designed for Raspberry Pi. It communicated with Raspberry Pi through I2C bus. There is a Maxim DS1307 and CR1220 button cell on the board to keep the real time for a long time after the Raspberry Pi has it’s power off. In order to offering a convenient way to debug, there are five pin has been setup which are 5v, 3.3v, Rxd,Txd on board.
Feature
- Use Maxim DS1307 chip
- Extends CR1220 button cell backup
- Can be operated with shell command
- Include a serial port connector
- Programmable square-wave output signal
- Consumes Less than 500nA in Battery-Backup Mode
- Automatic Power-Fail Detect and Switch Circuitry
- Programmable Square-Wave Output Signal
Parameters:
- Accuracy ±2ppm from 0°C to +40°C
- Work voltage 5V
- Battery Backup Input for Continuous Time keeping
- Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2100
- Work temperature 0°C to +70°C
- Port:
- Raspberry Pi B module 2X13 connection port
- Raspberry Pi A+/B+/2 module 2X13 connection port
- Raspberry Pi 3, Mode B, 1GB RAM 2x20 connection port
- 2*5pin 2.54mm connector
Packages
- 1 x RTC Module
- 1x CR1220 Battery
Document
- Mechanical Drawing:
How to Use:
- 1.Software Requirement:Base Raspbian Operating System
- 2. Connection: Just insert the module into Raspberry Pi
- 3. USB-to-TTL cable wire connect to RTC
- 4. Finally
Note: RTC 5v pin connect to USB-to-TTL Red wire(5v) RTC GND pin connect to USB-to-TTL black wire(GND) RTC TX pin connect to USB-to-TTL Green wire(TX) RTC RX pin connect to USB-to-TTL white wire(RX)
- How to configure in terminal
Here we assume that you have already burned the Raspbian Image into TF card and connect to your PC and logged in. Open a terminal and modify /boot/config.txt file using what you favorate editor such as vim.tiny or nano, add parameters as following picture:
You can read /boot/overlay/README and find this info to add support for ds1307 I2C Real Time Clock device.
Name: i2c-rtc Info: Adds support for a number of I2C Real Time Clock devices Load: dtoverlay=i2c-rtc,<param>=<val> Params: ds1307 Select the DS1307 device
please ensure that /boot/config.txt file include those three paramaters:
device_tree=bcm2710-rpi-3-b.dtb
dtoverlay=i2c-rtc,ds1307
dtparam=i2c_arm=on
save and reboot your RPi.
How to Check it
After reboot and log in, open a terminal and typing this command to check if RTC module is functional.
dmesg |grep rtc
if you can see this picture means that your RTC module is working properly.
and then you can adjust your system clock as following command:
Note: 051014302016.20 is equal to mmDDHHMMYYYY.ss, more information please using ‘man date’ command. Last step, set the Hardware Clock to the current System Time.
ok, finished. Have fun.
Purchase Links