I was able to load the "Hearts and Smiles" program to test out the board. It worked great!

Then I tried to load different programs and although the IDE detects the board on the proper port, I get the error message "No device found on ...."

I've sought help on the Arduino Forum, tried all of the suggestions, different cable and USB ports.....all to no avail.

Very frustrated to say the least. If I could give it 0 stars I would. POS!!!!

The several R3s I have work just fine.

I first placed an order on September 13, but the package sent via Fidex got lost in transit. I reported this to support and they offered me a refund or replacement. I still wanted the product and chose a replacement. But the package got stuck in transit again, Fedex didn't update the tracking, and I contacted support again. I asked to contact the delivery service and find out the real status of the parcel. To which they mockingly replied that until the delivery period has expired, nothing can be done, not even contact the delivery service. And when the delivery period expires, they will be “more than happy” to give me a new option to choose: return or replacement. So, a total of more than three months of waiting (!) passed, but the goods were never delivered. I am very disappointed and will never order from this store again.

Overall, I'm enjoying the new R4 wifi. But the project I purchased it for needed an RTC, turns out this RTC is useless. It is even less accurate than just counting millis. It lost somewhere between 30 seconds and 2 minutes sitting overnight.

The usb connection was tenuous at best. It came and went - but would only upload a sketch evbery once in a wjhile. There was no sequence of resets the pc or the module that would make it work. There is an update to the firm\wa.re of the card that made it better. Also trhe examples do not work well out of the box. Maby of the ethernet examples came from the ESP8266 and hadc the wrong include files. Other than that it is a nice littlew package..

The board is definitely a powerful board. The layout pin is similar but not always compatible with old UNO shields. Also the libraries need to match as the same processing chips are not used. For instance if you want this board to sleep or save power nothing supports this yet, the old libraries use the AVR and this is not on this board.

With those caution paid attention to it is a nice WiFi solution.

Delivery was quick and the product was packed very well. It has done all that it is advertised to do. I am extremely pleased.

You're lucky I'll keep it at 5 stars, but I wouldn't know how the R4 is, I haven't got mine yet. A series of events led to this, and I was slightly okay with it until I got this stupid review asking "how am I liking my new R4". I know the review game all too well, and I know you gotta do your homework before you start cold calling people, or as I put it, "whoring yourself out for reviews". You gotta have respect for yourself. Lol either way, here's your 5 stars, I hope it shows up one day. It's been a while since I ordered it.

This board is inexpensive and has a lot of features that make it good for IOT and general development but since it is part of the foundation of the Arduino ecosystem there are lots of tutorials and other resources so it is great for beginners as well.