The new Arduino R4 Minima and WiFi have a secret and I'll show you how to make use of it in your own sketch! You can find the Renesas RA4M1 hardware manual here: www.renesas.co...
On cypress boards the cap input pin can be used to measure heart rate, you just hold ground with one hand and touch the CPE pin, they even have example code for it.
Wow, thanks for the heads-up! Looks like capacitive touch has been explored as a cheap method for heart rate monitoring. Maybe Arduino has some code for this hidden somewhere...
Thank you for plowing through 1400 pages of documentation to find that. Now, if I wasn't afraid to take it our of the nice clear plastic case, I'd play with it!
I wonder what happens if you touch (with a finger) the heart-shaped solder blob, with the default sketch running? BTW, is the default sketch available to inspect? If so and touching the heart does something, the sketch may give a clue about how to use the capacitive-touch function.
The default sketch for the WiFi board is available. Not sure about the Minima, I think it was just the blink sketch. I haven't seen any references to the relevant pins in the Arduino core source, but I was thinking something could be hidden in the bootloader as I haven't seen source for it, just the binary blob
Putting a transistor from LOVE PIN TO GROUND OR POSITIVE and the BASE to a PLATE AS A TOCH PAD works just as well if is conected to any otrher pin used as input in the same way
would be amazing if someone with the skills could port GRBL or fluidNC to this board. It would be nice to be able to turbo charge cnc and laser machines that are using the original 8bit uno controllers.
you missed that on the top right corner of the arduino r4 wifi (idk about minima i dont have it) that if you shine it in the light there is a map of ITALY
This will probably sound lame due to my inexperience but as I am still learning, I will throw it out there. I do not mind sounding stupid in the process of learning. Naturally you can use it on any other pin but how about just using a TTP223 Touch switch on it? These are the kind of things I generally result to as a beginner and as I progress, I can look back and makes changes as I gain more knowledge.
I'll make a video about what I learned trying to drive the GPIO pins as fast as possible. I learned some interesting things about ARM assembly and the different clock speeds of the CPU and I/O pins
I noticed that the heart pin connects to a via right under the letter Y in the word ”ITALY”. XY means male. Is this some pride propaganda going on? Eerie…
If ESP-Now works with that board, I'd like to see and example of it. From all I've been able to find out, it should work. However, I don't know if there are special considerations, or how exactly the ESP32 chip is addressed by the R4 WiFi.
Thank you for such a deep dive into this! I am currently experimenting with my R4 WiFi board and I am interested with tinkering with both processors on their register level. I am fairly new to the game and haven't managed to find the resources on how to implement that in the Arduino IDE. Could you please provide some guidance for where/what to look for? 🙏👏
Check out the RA4M1 hardware manual from Renesas linked in the description above and start looking at the I/O port registers that I talk about in this video. It's not too complicated to configure the pins and read/write from them when you know how to address them. I'll make another video on what I learned about port output in the coming weeks.
💙 copy/paste. The UTF-8 encoding is multiple bytes, so it must be a string or wide char, not a plain char. Not sure if this works on the old IDE, I used the new one. I think technically it should be a UTF-8 string u8"like this"
this is not how this kind of datasheet works. You do read and understand it, but at the same time: You only have to skim the table of contents, skim section that seam relevant and when you identified which section is relevant, you read that section very carefully. BTW: You can not convert the datasheet to text, as the most relevant and complex information is decoded in tables.
