Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [ds1307]

a low-power I2C serial real-time clock (RTC) with full binary-coded decimal (BCD) clock/calendar plus 56 bytes of non-volatile SRAM

18 questions
18
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5 answers

i2cdetect shows every possible address

I was trying to turn on I2C following this tutorial http://www.raspberrypi-spy.co.uk/2014/11/enabling-the-i2c-interface-on-the-raspberry-pi/ But I have problem which I cannot solve. The command i2cdetect -y 1 returns 0 1 2 3 4 5 6 7 8 …
wja
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3 answers

How to install Real Time Clock (RTC) on Raspbian?

I have: Raspberry Pi with 2015-05-05-raspbian-wheezy ds1307 attached (it's an Adafruit board, pullup resistors not installed). How do I: configure drivers make sure the Pi actually uses the RTC time on startup? I've actually done the first…
greggo
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4 answers

How can I automatically update the hwclock with NTP when I have internet connection

I'm using an RPi with Raspbian which runs the NTP-daemon by default. I have connected an rtc-ds1307 external i2c hardware clock. I was following the instructions given here to set it…
Thomas
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2
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0 answers

Why is my RTC DS1307 not being recognized?

I'm trying to wire up a DS1307 RTC to my Model B Pi. I'm following the diagram as shown in this crude image and I've also tried it like this but it isn't recognized by the Pi. When I run i2cdetect -y 1 I don't see anything registered. When I wire…
DustinDavis
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2
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4 answers

Connecting RTC DS1037, Pin 5 already occupied

I think of adding a RTC Module to my Raspberry Pi. I found the following tutorial. http://www.forum-raspberrypi.de/Thread-tutorial-realtime-clock-rtc-ds1307-am-raspberry-pi-betreiben In general it's clear how I could connect it. But I already have…
Christoph Daum
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1
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2 answers

Configuring to read RTC at boot time

I have added an RTC to the I2C bus of the Raspberry Pi. If I follow the steps mentioned here (I am using the DS1307 RTC IC), I can run hwclock and read the time. root@raspberrypi:~# modprobe rtc-ds1307 root@raspberrypi:~# echo ds1307 0x68 >…
Lord Loh.
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2 answers

How to connect DS1307 5V Real time clock (RTC) to 3.3V?

I have DS1307 small SMD parts so I can't simply leave out the resistors easily to make it work with 3.3V by default as with adafruit kit tutorial. How could I connect this device to my Raspberry Pi correctly? I assume I could add a resistor but I am…
DominicM
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2 answers

Why is my RTC DS3231 but seems DS1307?

I bought a RTC DS3231 because of the accuraty of time (2ppm, I was searching an accurate RTC). When I received it, I checked that in the encapsulating it is as well marked like DS3231. But, after install the RTC, I realized that it seems DS 1307. I…
user940969
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1 answer

RTC DS3231 could not be detected

HardwareSet up: Pi Model B, with Raspian Stretch. Boots up. Now try to install RTC Ds3231 module (with yellow capacitor at back) and plugged into the GPIO pins. Software: $ lsmod shows part of the list shows: rtc_ds1307 13908 0 hwmon 10552 …
mark
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0
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1 answer

rtc module in Raspbian Stretch

I'm following this guide to set up the rtc module in Raspbian Stretch. First question: after the changes described, the RPi doesn't sync anymore with the actual time from the Internet. Second question: how is handled the sync between system and…
Mark
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2 answers

UPS PIco on Raspberry Pi B+ with Jessie

I have been using a PiModules UPS PIco add-on board on my Raspberry Pi B+ using Wheezy for over a year now. No problems. I just created a new boot SD with Jessie and while the PIco unit seems to be working, the Pi is throwing an error when it runs…
RDK
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How to use two different RTC modules (ds1307/ds3231) on the same PI

The question is: How to use the same SD image when you don't know which RTC module will be connected on top of Raspberry PI? I have two modules in use in…
Dmitry
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1 answer

HAT EEPROM DTB and RTC on I2C0

I'm having a problem creating a DTB for a HAT auto-configuration. I have a DS3231 RTC module attached on I2C0 (GPIO0 and GPIO1). It incorporates an AT24C32 EEPROM at address 0x50. To get it working, without getting into the HAT part yet, I've added…
Bryan Horna
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0 answers

i2cdetect detects the device but also shows a full row of addresses

I have successfully setup a RTC clock ( DS3231 ) on a RPi zero. The whole process was explained here. It works as expected but with only a minor difference: Row 5 is filled with numbers from 0x50 to 0x5f. There are guys here who complain about all…
BHP
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1 answer

DS3231 doesn't update its internal time?

UPD: with another chip of the same model RTC works just fine, presumably that the chip was broken/damaged. I installed DS3231 RTC clock ( which is detected as DS1307 for some reason). My config.txt looks…
jdevelop
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