Review Blogs - All Comments

RE: Arduino nano r4 review

shabaz — Fri, 03 Apr 2026 22:30:23 GMT

Hi,

Just to be clear: The section 8 "Root cause analysis" refers to:

Clock Misconfiguration / Bootloader Interference / USB Stack Failure

but how could it have been any of those, unless Arduino shipped it with the incorrect firmware or no firmware?

Is that the case, or is there something missing in the review (i.e. was the board firmware modified by you?). I think it's important to know, because all the rest of the review refers to a far more complicated method of working with that board, rather than using the Arduino IDE. I know you were fine using the more complicated method, but most users will expect (and want) to use the Arduino IDE with the Arduino board. Any clarification would be great. I would want to know, if I buy that board, will it come with the Arduino firmware installed or not (I likely will not care if I can re-upload it provided it's robust and not easily corrupted, but that for sure is good to know too, but that's a separate issue).

RE: Arduino nano r4 review

misaz — Fri, 03 Apr 2026 20:35:20 GMT

Shorting MD and SWDCLK does not seem right to me. It may work by accident though. MD is like BOOT0 on STM32s. Theare are two bootloaders on Arduino Nano R4. One is baked in the MCU and is triggered by MD pin at power up time. Second is Arduino bootloader is stored in flash memory and is triggered by two reset presses or whatever they use nowadays. It is not clear if "Unknown Device" come from Arduino bootloader (I guess) or Renesas baked bootloader which I would expect behave as standard USB DFU class. I think if you recover it by connecting MD pin to GND instead of SWDCLK, you were able to recover or flash new program directly over onboard USB using Renesas tooling without need of any soldering. But I do not have this board, so can't verify.

RE: Arduino nano r4 review

dougw — Sun, 29 Mar 2026 21:57:43 GMT

Yikes. I am about to fire up my Nano R4. I'll let you know if it fares better.

RE: Arduino nano r4 review

DAB — Sun, 29 Mar 2026 19:46:38 GMT

Very good post on your experience.

RE: Arduino nano r4 review

robogary — Sun, 29 Mar 2026 16:20:01 GMT

wow. So the short story of the Arduino Nano R4 that is was brain dead on arrival with no chance of recovery ? Was there any communication to the Arduino website or product service ?

RE: Arduino Uno Q - getting started

DAB — Tue, 24 Mar 2026 19:45:33 GMT

Nice post.

RE: Giga Oscilloscope

dang74 — Sun, 14 Dec 2025 13:23:50 GMT

I really like how touching the screen sets the scope to continually sample and then holds the moment your finger is removed. Also, I must say that erasing the last pixel before writing the new one is pretty clever. I don't think I would have thought of this and would have instead called up the function to clear the screen one pixel at a time... which would have been very wasteful in terms of time budget.

RE: GIGA MQTT Client

e14phil — Wed, 10 Dec 2025 10:13:13 GMT

Love that, MQTT is super powerful and simple, what a great way to show it

RE: Giga Oscilloscope

DAB — Tue, 02 Dec 2025 21:23:28 GMT

Well done Douglas.

Back in 1983 I programmed an early attempt at a digital oscilloscope to analyze radar patterns using a Z80.

For the time we did quite well.

The GIGA implementation is very good compared to what we achieved.

RE: GIGA Paint

DAB — Tue, 02 Dec 2025 21:05:04 GMT

Nice post Douglas.

The GIGA looks very interesting and powerful.

RE: GIGA Paint

robogary — Mon, 01 Dec 2025 21:45:19 GMT

You make it look so easy. Very nice demo

RE: GIGA Paint

kmikemoo — Mon, 01 Dec 2025 00:58:13 GMT

[mention:193ac2434c814a24b46635a2210baec1:e9ed411860ed4f2ba0265705b8793d05] I'm amazed by how much this GIGA can do. Thanks for sharing all these different capabilities.

RE: GIGA Paint

beacon_dave — Sun, 30 Nov 2025 12:25:48 GMT

Move over PhotoShop / Van Gogh... [emoticon:c4563cd7d5574777a71c318021cbbcc8]

I recall we had minimalist touch screen paint on the Uno back in 2012 but the touch screen overlay was pretty fragile and the resolution was minimal

https://learn.adafruit.com/2-8-tft-touch-shield/touchscreen-paint-example

RE: STMicro, WURTH Elektronik and E14 Special Project - SensorTile Wireless Industrial Node

DAB — Fri, 28 Nov 2025 19:50:52 GMT

Nice update Peter.

RE: GIGA MQTT Client

DAB — Fri, 28 Nov 2025 19:45:35 GMT

Nice project Douglas.