HiLetgo Data Logger Module Logging Shield Data Recorder Shield for Arduino UNO w/SD Card

This HiLetgo module is an inexpensive option for logging data on UNOs and compatibles. It requires a CR1220 coin cell battery, not included, to store date and time when not under power. The real time clock (RTC) requires a software library, but these libraries are widely available online and can be installed from any recent version of the Arduino Integrated Development Environment (IDE). The software library for the SD card is part of an IDE installation.There might be concerns about quality control at this low price, but I have used many of these modules without problems. The RTC will gain or lose time slowly over weeks or months (depending on temperature), but this is a property of the clock oscillator and not this particular device.In conclusion... highly recommended if you need data logging with UNOs!

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I really like the easy connection of this shield, but programming it is not beginner friendly. The RTC on the data logger shield is a DS1307. Don’t make the mistake of writing code for a different one. Found a tutorial on YouTube that provides a simple and straightforward tutorial for programming. Look up “Modest Maker”. His video called “Arduino - Datalogging” is the one I used that worked (you’ll find all the necessary libraries, etc).

The module is good however the connector is truly bad. You need to be very careful when snapping it into the Arduino. 3 stares just for the PCB quality

I bought this for the rtc on a shield. Might use sd logging at some point.I don't like that I had to connect sda to a4 and sdl to a5 myself. I used superglue to attach a wires. The whole point of a shield is to get rid of some of the wire mess. In any case works well. The day of the week did not work for me, but I did not need it. I used this to turn an arduino and a doorbell into a kind of grandfather clock.

These little boards are in excellent condition when taken out of the box. Remember to buy a button cell battery and an sd card. Pins are all straight and all solder joints are visually excellent. I have yet to test the functionality but it appears to be very professionally manufactured.

The default SD libraries on arduino use pin4 for the chip select. Mine didn't work out of the box until I changed the chip select to use pin 10.

Board is basically the same design as the older Adafruit part, so it works with their older tutorials. However the quality of this product explains why it's cost is so much less. The header pins are very flimsy and the soldering in general is not high quality. The one I purchased appeared to be working at first but then i noticed the battery connector for the RTC was loose. Upon closer inspection it wasn't the solder joint that was loose the pad itself had come up from the PCB, rendering the who thing useless. Your mileage may vary but don't expect a quality part.