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!

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.

This shield came on time and was exactly as described.This is an R3 version shield, but since it doesn't have an ICSP jack, it won't work interchangeably with the MEGA 2560 R3, without modifying things. Also, this card uses Pin 10 for SD, not the default pin 4 that the Arduino SD library defaults too. Once that's changed, the SD card functions with the library.A minus: because this version of the shield does not have an ICSP jack and pins incorporated, it will be hard to use it on the Mega 2560. They are other shields that do, but none incorporate the RTC, that I am aware of. I realize this is exactly what the open-source has, so I don't fault the shield manufacturers.A plus is the clock. It works well. The SD library doesn't support writing a date (from the RTC) automatically. You need to add a clock call-back function to the loop(), and associate it correctly, during setup. Once that's done, it works very well.Another plus is that it is R3 compatible, so it includes the SDA and SCL pins. They are also broken out so they are easy to use. I find it a useful shield and have incorporated it into an automatic SD temperature logging sensor project. It functions very well and with the clock helped me to reduce the number of shields/additional components.I would use it again, assuming it will be used on the Arduino UNO R3.Note: To repeat, I don't blame the manufacture for the negative things, this is exactly what the open-source specified and they have followed it.

This shield works well with older Adafruit libraries. Note that the SDA/SCL pins (next to the reset button) are not connected. If you use a board other than R3, you need to connect the A4/A5 pins to proper SDA/SCL pins manually. I would prefer the new Adafruit shield, but this was less than 1/2 price.

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.

Used to record my air condition going on and off. Worked great for my use case. Was a lot of fun writing the code and easy to use

Great product but did work little well on my project

Received "HiLetgo Mini Logging Recorder Data Logger Module Shield V1.0 For Arduino UNO SD Card" that was non-functional. Solder joints from SD card slot to PCB suffered from both insufficient wetting and insufficient amount of solder. I am returning and will update review should the replacement work.Update: Replacement shield works. Absolutely no documentation provided and board layout is slightly different than the Adafruit documentation they tell you to use.