Donop DS3231 AT24C32 IIC module precision Real time clock memory module Arduino
|Price:||$3.99 & FREE Shipping|
- Operating voltage :3.3 - 5 .5 V
- Clock chip: high-precision clock chip DS3231
- Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
- Calendar alarm clock with two
- Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
Frequently bought together
Customers who viewed this item also viewed
CHOKING HAZARD -- Small parts. Not for children under 3 yrs.
1 Size: 38mm (length) * 22mm (W) * 14mm (height)
2 Weight: 8g
3 Operating voltage :3.3 - 5 .5 V
4 clock chip: high-precision clock chip DS3231
5 Clock Accuracy :0-40 ??range, the accuracy 2ppm, the error was about 1 minute
6 calendar alarm clock with two
7 programmable square-wave output
8 Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
9 chip temperature sensor comes with an accuracy of ?? 3 ??br> 10 memory chips: AT24C32 (storage capacity 32K)
11.IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
12 can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
13 with rechargeable battery LIR2032, to ensure the system after power failure, the clock move any natural normal
14 Packing: single anti-static packaging
Wiring instructions (with Arduino uno r3 for example):
1 x Donop DS3231 AT24C32 IIC module precision Real time clock module memory module Arduino
Top customer reviews
I am changing my review from 1 star to 5. I found the solution to my problem. I am surprise that no body says anything here about it. Basically my problem was: I set the time and date, disconnect the power, the time and date was not kept in memory, it default to the time and date I ran the sketch.
The solution was found here in this tutorial: " http://tronixlabs.com/news/tutorial-using-ds1307-and-ds3231-realtime-clock-modules-with-arduino/ "
Very easy and straightforward. Happy Arduino Hacking!
Ran demo using date and time functions using this DS3231 RTC connected via I2C and Wire lib:
Apparently the DS3231 has a default I2C address of 0x68 and cannot be changed (clock)
Pros: accurate clock, already soldered 6 pin plugs into breadboard easily.
Cons: comes with regular, not rechargeable LiOn battery. No documentation.
It does NOT come with a rechargeable battery.
However, if you have the impression that it does, then it is due to the product description being poorly translated.
I did contact them and they offered a small credit, which I declined. I did ask them to update the description.
It was partially my fault since if I had read the reviews I would have seen that it didn't include the LIR battery
It works well and I even have the alarm interrupts working with my arduino
Fair price for product
A warning though, they are meant to have LR2032 batteries (rechargeable) and Donop generally sends them with CR2032 (non-rechargeable) batteries.
While the CR2032's will work after a while you'll notice a bulge and there's a very good chance the unit will potpie cover and you'll have battery problems all over the RTC and anything else. Sometimes the CR2032's have been know to build up enough gas pressure for the constant charging to have the top actually blow off!
Anyway, it worked just fine, including the battery backup. It took a little while for me to figure out how to use the library but once I did it was fairly simple to use in an Arduino script using a prototype board. Now I hope to add it to a little weather station I built, so it can log readings.
Most recent customer reviews
Installation was painless and it works just fine. By far, the easiest add-on I've worked with so far.Read more