Manufacturer | HiLetgo |
---|---|
Brand | HiLetgo |
Item Weight | 0.81 ounces |
Product Dimensions | 1.5 x 0.87 x 0.55 inches |
Item model number | 3-01-0435 |
Is Discontinued By Manufacturer | No |
Color | Blue |
Size | Small |
Manufacturer Part Number | 3-01-0435 |
HiLetgo 5pcs DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module for Arduino Without Battery
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | HiLetgo |
Memory Storage Capacity | 32 KB |
Connectivity Technology | I2C |
Product Dimensions | 1.5"L x 0.87"W x 0.55"H |
About this item
- HiLetgo DS3231 AT24C32 Clock Module Real Time Clock Module
- Working voltage : 3.3 -. 5 .5 V
- Clock chip: high-precision clock chip DS3231M
- Memory chips:. AT24C32
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This Item HiLetgo 5pcs DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module for Arduino Without Battery | Recommendations | dummy | dummy | dummy | dummy | |
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Price | $12.99$12.99 | $9.88$9.88 | $8.49$8.49 | $14.99$14.99 | $22.10$22.10 | $10.99$10.99 |
Delivery | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 |
Customer Ratings | ||||||
Sold By | HiLetgo | Teyleten Robot-US | HiLetgo | HONGXINBAORUI | 3DMakerWorld, Inc. | Geekstory |
connectivity tech | I2C | I2C | I2C | I2C | I2C | I2C |
wireless standard | — | bluetooth | — | bluetooth | bluetooth | — |
Product Description
DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module for Arduino
Parameters:
1. Dimension: 38mm* 22mm * 14mm
2. Weight:. 8g
3. Working voltage : 3.3 -. 5 .5 V
4. Clock chip: high-precision clock chip DS3231
5. Clock accuracy within range :0-40 ¡æ, accuracy 2ppm, about 1 minute in error
6. Programmable square-wave output
7. Real-time clock, it can generate seconds, minutes, hours, day, date, month and year, and provide time until 2100, and with leap year compensation.
8. Internal chip temperature sensor comes with an accuracy of ¡À 3 ¡æ
9. Memory chips:. AT24C32 (storage capacity of 32K)
10. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
11. IIC other devices can be cascaded, 24C32 address can be modified by a short circuit A0/A1/A2, the default address is 0x57
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Product information
Technical Details
Additional Information
ASIN | B00LX3V7F0 |
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Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #34,386 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #2 in Semiconductor Timing Management Products |
Date First Available | July 18, 2014 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of use, quality, performance, accuracy, and value of the single board computer. For example, they mention that it's easy to get up and running, works well with Arduino and Raspberry Pi projects, and keeps the time very accurately. That said, opinions are mixed on battery life.
AI-generated from the text of customer reviews
Customers like the accuracy of the single board computer. They mention it's easy to set up and runs, and keeps the time very accurately. Some say the clock itself is wonderful and exceptionally accurate.
"the clock itself is wonderful, and exceptionally accurate. be careful with the batteries though...." Read more
"...Accuracy is very good as one would expect from a temperature-compensated crystal oscillator (which is internal to the IC)...." Read more
"...The issue is keeping the time once set...." Read more
"...one of these modules in my smart car project and it is keeping the time very accurately even under the Texas Sun, stored under the dash!..." Read more
Customers find the single board computer easy to use. They mention it's easy to get up and running, and the hookup is simple. They also appreciate the ease of library changes and the fact that the i2c protocol is simple to use on any Arduino.
"...No issues and very easy to use. These are a great value and highly recommend." Read more
"Easy to get up and running. Good accuracy." Read more
"...Hookup is EASY - i2c is a simple protocol to use on any Arduino (just look up the pins on your model) and RTClib will connect and use the unit very..." Read more
"These modules are easy to use and a real value at $1 per module...." Read more
Customers are satisfied with the performance of the single board computer. They mention that it works well, has no issues, and is easy to use. Some say that the clock modules work well with Arduino and Raspberry Pi projects.
"These worked very well when adding real time clocks (RTC) to my projects. No issues and very easy to use...." Read more
"These clock modules work well with Arduino or Raspberry Pi projects, there are readily-available open source libraries for both...." Read more
"So far these work well using the I2C link to program/read these clock modules and no problem with time keeping...." Read more
"These RTC work nicely for custom built logging device using an Arduino microprocessor...." Read more
Customers are satisfied with the quality of the product. They mention it's an excellent product, and a great clock module.
"...Reordered for new projects. These RTCs are great especially being able to adjust the drift..." Read more
"Great clock module. Be careful with battery...." Read more
"Good product..." Read more
"Excellent product...." Read more
Customers appreciate the value of the single board computer. They say it has a real value at $1 per module and is very cheap compared to name brands.
"...No issues and very easy to use. These are a great value and highly recommend." Read more
"...Good value!" Read more
"These modules are easy to use and a real value at $1 per module...." Read more
"...After a few days, it shows no sign of drifting. Very cheap to compared to "name brands"." Read more
Customers are mixed about the battery life of the single board computer. Some mention that it works well and has no problems with time or battery, while others say that it uses a ton of power and slowly kills the battery.
"...using the I2C link to program/read these clock modules and no problem with time keeping. So far no problems with the battery either...." Read more
"...This means there's really no point to that huge battery - the unit would do better using network time that would be adjusted every so often during..." Read more
"...multiple parts and carefully inserted my battery, it keeps time reasonably well and doesn't slowly destroy whatever battery I put in it...." Read more
"All five of these modules I received are bad, none will save the time on power down they all communicate over i2c but their main purpose is to save..." Read more
Customers are dissatisfied with the modules of the single board computer. They mention that they are defective and not reliable.
"These are not reliable modules, but if you get lucky you will find one that keeps time reasonably well...." Read more
"...Not really happy with getting two defective modules but it's too late to go back to the seller." Read more
"...so I doubt that it is just my luck that 80 percent of the modules I received were faulty...." Read more
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The IC can provide (optionally, not active by default) a 32KHz reference clock, and either a programmable-frequency square-wave output or an alarm-interrupt output.
I've not used the on-board EEPROM in any of my projects, but it's there and visible on the I2C bus.
You can read the temperature value from the on-chip calibration sensor, it's not super high resolution, but good enough as a rough temp sensor.
A couple things to look out for:
1) This board has a diode and resistor that will attempt to charge the battery from the VCC source, if VCC is high enough to overcome the diode drop. Probably not a huge issue with 3.3V systems, more so with 5V. The current is low, but it's generally considered bad form to try charging lithium coin cells (the IC on this board is explicitly certified to NOT charge the battery). If you intend to use such a battery, the diode can be removed to disable this function. If you want to use a supercapacitor backup, keep it.
2) Alarms don't work without VCC present. It will set the alarm flag, but the open-drain I/O pin will not be asserted until VCC is applied. This is expected, that's how the IC works, but if you want a clock that can run exclusively from the coin battery and wake up your CPU with an alarm, this isn't it. Interestingly, it CAN provide the square-wave output when running on the battery.
Hookup is EASY - i2c is a simple protocol to use on any Arduino (just look up the pins on your model) and RTClib will connect and use the unit very easily.
The issue is keeping the time once set. I'd created several items that needed time over the last month so I've used several of these RTC units to keep time. However, after even a day there's a very big drift in time - several minutes, at times several 10s of minutes! This means there's really no point to that huge battery - the unit would do better using network time that would be adjusted every so often during the day.
The last issue is power consumption. It's HUGE - a large power led shines and wastes mAs galore when running. Of course if you're just starting out, the LED may be helpful to see things are turned on, but as I've had to build little project boxes for my things, I find this unit too large and too power-hungry, on top of not being able to keep time. So for practical time use, I'm looking at the Nano33 IoT which has RTC built in and other solutions where power consumption is low and size even so.
The company contacted me about my original negative review and offered to refund me for the bad unit (1 of 5) or replace it, at my option. They also promised to do better QC and not allow this sort of thing to happen again - doing "better QC" is a pretty major undertaking, practically a change in company culture, in my experience. But we'll see. I have to give them a couple more stars for being proactive with their customer service. That said, my original comments do still stand. Original review below:
---------------
5 pieces - 4 that work fine, one that doesn't do squat.
Perhaps worse than the dud: 2 of the 3 have different silkscreening on the PCB. I bought this brand because I tested a smaller pack of them and they worked great (many brands of this module I've tried have TERRIBLE clock accuracy). So... it's a mixed bag. Literally! That's irritating.
Also, it says "without battery" in the product title. One of mine had a battery installed. How silly is that?