I am thinking of replacing NANO with Uno.
Do you think this will cause a lot of changes in code or components ?

The Uno hosts the very same microcontroller as the classical Nano (ATmega328), so no differences at all.

 

I am thinking of replacing NANO with Uno.
Do you think this will cause a lot of changes in code or components ?

The number of I/O's brought out to the headers are different.

Nano claims 20 digital (6 PWM) and 8 analog. I only see pins for 14 digital; like Uno.

2k of the 32k FLASH used for bootloader.

Uno has 14 digital (6 PWM) and 6 analog.

0.5k of the 32k FLASH used for bootloader.

 

https://www.banggood.com/Geekcreit-...-p-1185788.html?cur_warehouse=CN&rmmds=search
Can I use this one as module for Arduino Nano?

 

https://www.banggood.com/Geekcreit-...-p-1185788.html?cur_warehouse=CN&rmmds=search
Can I use this one as module for Arduino Nano?

Maybe, but not without a lot of work. I have several concerns...
1) it’s from Banggood
2) the library is from a private individual; not from an Arduino sponsored source
3) there is at least one reviewer who says the library does not work as expected
4) with a Nano, the supplied headers will not work as designed, requiring custom direct wiring. This is a chance for errors.
5) there are many DS1307 Arduino compatible boards available, that would be better choices.

 

Maybe, but not without a lot of work. I have several concerns...
1) it’s from Banggood
2) the library is from a private individual; not from an Arduino sponsored source
3) there is at least one reviewer who says the library does not work as expected
4) with a Nano, the supplied headers will not work as designed, requiring custom direct wiring. This is a chance for errors.
5) there are many DS1307 Arduino compatible boards available, that would be better choices.

Tnx for your replay!


https://www.ebay.com/itm/DS3231-Rea...iseUnbiasedWeb&_trksid=p2047675.c101195.m1851

https://www.ebay.com/itm/PCF8523-RT...178483?hash=item5db657fdf3:g:3SgAAOSwI51fhcNh

Will any of these be a better option?

 

Tnx for your replay!


https://www.ebay.com/itm/DS3231-Real-Time-Clock-RTC-I2C-Horloge-en-Temps-Reel-avec-batterie-RTC-TimerMart/133624699702?_trkparms=aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=20201210111314&meid=e88c4a5915434d3eb86c2ab59893288c&pid=101195&rk=2&rkt=12&mehot=pf&sd=262791426448&itm=133624699702&pmt=1&noa=0&pg=2047675&algv=SimplAMLv9PairwiseUnbiasedWeb&_trksid=p2047675.c101195.m1851

https://www.ebay.com/itm/PCF8523-RT...178483?hash=item5db657fdf3:g:3SgAAOSwI51fhcNh

Will any of these be a better option?

Maybe, but they’re from eBay, so there’s a likelihood they won’t work.

But from a real company.

https://www.sparkfun.com/products/12708

They work with the Arduino RTC library and provide a download and tutorial as well.

 

Why not https://www.adafruit.com/product/3296 - they're providing a lib as well