Questions tagged [rtc]

a Real time Clock, a computer clock.

A real-time clock (RTC) is a computer clock (most often in the form of an integrated circuit) that keeps track of the current time. Although the term often refers to the devices in personal computers, servers and embedded systems, RTCs are present in almost any electronic device which needs to keep accurate time.

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real time clock puzzle with new rasbian jessie

I have been trying to install a RTC on my raspberry pi 2 (running Raspbian Jessie lite 2015-11-21) and I run into the following problem that puzzles me: I set the correct time on the hardware clock and shut down the pi. I unplug the ethernet…
Clémentine
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rtc DS3231 not updating system with new raspbian GNU Linux 9 stretch

Just updated to Raspbian stretch and my ds3231 will not update the system clock on reboot - i suspect that the command /sbin/hwclock -s is not working in /etc/rc.local - if I just do the update manually sudo hwclock -s the system date time updates…
Paul
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Make something happen at a specific time

I have been playing with a RPi for a little while now. I have just got a new DS3231 RTC for it, and I want to use the RPi to turn an LED on at a specific time and have its brightness adjust up every hour then adjust back down every hour until a…
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using a real time clock (rtc) with Raspbian

The Raspberry Pi doesn't come with a realtime clock; if you want to run a standalone (no network) pi with the proper time automatically set on boot you need a real time clock (rtc). There are a several rtc chips available, most run on the i2c serial…
Jason
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Share the Raspberry Pi date and time with esp8266 on the same network

I would like to share the time and date on my Raspberry Pi, which is functioning as a MQTT server, with the ESP8266 units on my network. This is so I do not have to attach RTC boards to each one. I could use a NTP get program on each ESP-8266, but…
Don M
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Stackable real time clock?

I'm using Pibrella on my Pi (Model B+) and now I need RTC functionality. Are there stackable RTC modules that you know of? Any help is greatly appreciated. Regards, Kevin
bitfrickler
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