Raspberry Pi 4 / 4GB RAM

Any other microcontroller based boards
Post Reply
User avatar
Vassilis
Posts: 149
Joined: Wed Feb 27, 2019 5:09 pm
Answers: 2
Location: Thessaloniki, Greece
OS: Linux, Win10, MacOS
IDE: Arduino 1.8.9
Core: Roger, STM official
Board: Bluepill, Maple mini, STM32F4xx
Contact:

Raspberry Pi 4 / 4GB RAM

Post by Vassilis » Thu Aug 08, 2019 3:07 pm

Today I bought from a Greek store a RPi4 / 4 GB + official 3A power adapter (USB Type C) + official case for 70 Euros.
Normally, tomorrow I'll have it in my hands :D
-Vassilis Serasidis

mrburnette
Posts: 90
Joined: Fri Mar 29, 2019 2:22 am
Answers: 1
OS: Linux
IDE: Arduino
Core: Any
Board: Blue, MM, Black

Re: Raspberry Pi 4 / 4GB RAM

Post by mrburnette » Thu Aug 08, 2019 7:02 pm

Vassilis wrote:
Thu Aug 08, 2019 3:07 pm
Today I bought from a Greek store a RPi4 / 4 GB + official 3A power adapter (USB Type C) + official case for 70 Euros.
Normally, tomorrow I'll have it in my hands :D
I got my 4GB version back during the launch. It is remarkably fast for a SoC-based board, even Chromium is usable, IMO. I was using it with Node Red development for a friend that wanted his OLED engine monitor status on his Europa "mirrored" on a tablet/smartphone as fancy graphic displays. BTW, Node Red easily takes formatted Arduino serial as pseudo-JSON serial debug data and parses it perfectly... very straight-forward*

Built-it up somewhat like I did my Zero-W: a prototype environment.
https://www.hackster.io/rayburne/rpi-da ... hid-d626ab

I used a dedicated USB-C wall supply sourced from Amazon as is the cap-touch screen and BT keyboard:
https://www.amazon.com/gp/product/B0719KV9PH
https://www.amazon.com/gp/product/B01ID5BQTC (7 inch display)
https://www.amazon.com/gp/product/B00WN2N73A

Beware the keyboard, I got mine for $17 ... some Amazon resellers want 2x that.

* I had posted some code and pix on the stm32duino.com of the results, but it appears that wss not captured before the crash... I thought it was in off-topic, and I was unable to locate it via Internet Archive. IF anyone is seriously interested, I can create a summary process on this site. Essentially, the trick is to properly format your serial diagnostic data so there is no need for the JSON library... thus, no extra code except for a few static tags that can be kept in flash memory.
UPDATED: see https://mcu.selfip.com/viewtopic.php?f= ... 1035#p1035

Ray

User avatar
Vassilis
Posts: 149
Joined: Wed Feb 27, 2019 5:09 pm
Answers: 2
Location: Thessaloniki, Greece
OS: Linux, Win10, MacOS
IDE: Arduino 1.8.9
Core: Roger, STM official
Board: Bluepill, Maple mini, STM32F4xx
Contact:

Re: Raspberry Pi 4 / 4GB RAM

Post by Vassilis » Wed Aug 21, 2019 2:01 pm

After a few days of testing I found that the RPi4 / 4 GB is actually the most powerful Raspberry Pi, at least more powerful than my RPi3 B / 1 GB. I've only tried the Raspbian Buster Operating System. Raspbian was installed on a Samsung microSDXC 64GB U3 UH5 card.

What I liked
  • The startup was very fast.
  • The pre-installed office suite (Libre Office) was also very fast.
  • Netflix runs ok up to 720p on Chromium via the Widevine patch.
  • 4 GB RAM allows you to create RAM Disks and run your applications / Databases from there with unlimited read / write cycles at extremely high speeds
What I didn't like
  • Excessive heat on the CPU chip. I had to use a heat sink + fan to lower the temperature from almost 80 ° C to 40-45 ° C. The ambient temperature was 30 ° C during the tests.
  • The Micro HDMI connectors are too small and the two adapters I used (micro HDMI to HDMI) had problems (green pixels on LG's 4k TV). Finally, I found a micro HDMI to HDMI cable that was working properly.
A friend of mine was excited when he saw the RPI4 and I sold it to him.
I think I'll wait for the new RPI4 B+. Until then, maybe the RPI engineers will solve the CPU heating problem, that's not a real problem. Put a fan, and the problem is gone!
-Vassilis Serasidis

ag123
Posts: 163
Joined: Thu Mar 07, 2019 6:15 am
Location: Singapore
OS: linux
IDE: eclipse, arduino 1.8.5
Core: Roger's
Board: Maple mini, Bluepill

Re: Raspberry Pi 4 / 4GB RAM

Post by ag123 » Mon Sep 16, 2019 4:23 am

RPi4 beats the Asus tinkerboard, once deem a fastest Pi style board on the planet
https://www.phoronix.com/scan.php?page= ... arks&num=1
so now the original RPi4 got back its crown being the fastest on the planet

but it has not even arrived at my local newark store so long after it is launched, i'd just keep waiting
:lol:

Post Reply