When first Raspberry Pi board was introduced it literally changed the understanding of small computers by bringing Linux closer to us. With great support, low board prices and huge community it stayed on top next to Arduino for four years. Of course in to keep that success, updates in hardware and software are mandatory. We know how fast things change computer industry, so time to time Raspberry Pi foundation kept upgrading Pi boards From first, to second and now the newest third generation – Raspberry Pi 3.
At first glance you may see that Raspberry Pi 3 board is practically identical to version 2. component layout is same including all peripherals. So all enclosures that worked with Pi2 should fit fine for Pi3 boards. But not the most obvious things that make it stand out.
Specifications of Raspberry Pi 3
- SoC: Broadcom BCM2837
- CPU: 64-bit quad-core ARM Cortex-A53
- GPU: Broadcom VideoCore IV
- RAM: 1GB LPDDR2 (900 MHz)
- Networking: 10/100 Ethernet, 2.4GHz 802.11n wireless
- Bluetooth: Bluetooth 4.1 Classic, Bluetooth Low Energy
- Storage: microSD
- GPIO: 40-pin header, populated
- Ports: HDMI, 3.5mm analogue audio-video jack, 4× USB 2.0, Ethernet, Camera Serial Interface (CSI), Display Serial Interface (DSI)
First huge upgrade is processor – in fact comes with new Broadcom BCM2837 system on chip which features four 64-bit ARM Cortex-A53 cores running at 1.2GHz having 32kB Level1 and 512kB Level2 cache. It also has VideoCore IV graphics processor which now runs at 400MHz (3D core at 300MHz).
As always Soc it is sandwiched with a bit faster 1GB LPDDR2 memory module. Multi-core architecture brings Raspberry Pi 3 to new level of processing power. Initial benchmarks indicate up to 10 times performance increase comparing to first model and up to two times compared to Pi 2 when running multi-threaded operations. So we sould expect significant gain when running multithreaded programs. Another obvious performance increase is in GPIO speed. We like using Python for GPIO programming and we know that IO speed wasn’t great. With Pi 3 you should feel significant increase – up to twice comparing to Pi 2.
WiFi and Bluetooth
Speed increase is always logical with newer version so nothing unexpected here. But the real thing what lifts Raspberry Pi to new level is built in WiFi and bluetooth support. They have included small Broadcom BCM43438 chip which handles all wireless radio. It supports 2.4GHz 802.11n wireless LAN, Bluetooth Low Energy, and Bluetooth 4.1 Classic radio support. In order to keep all costs down they soldered naked silicon to the board. Lets hope, that direct light wont disrupt its normal operation.
We recommend EasyEDA for circuit design and PCB prototype
Fun thing is that chip also comes with FM radio receiver, but they decided to disconnect this feature. It is hard to tell why, but this could be another interesting feature.
Wireless chip also needed an antenna, so they included miniature antenna in place of previously used status LED which has been moved next to microSD slot.
So no need for additional external antenna to be used. IT expected range should be as god as any smart phone.
The rest is same as in Pi 2
And this is practically all news about Raspberry Pi 3. The 4x USB 2.0 stays same as in Pi 2 including other things like 10/100 Ethernet, GPIO, HDMI, 3.5mm analogue audio-video jack,Camera Serial Interface (CSI), Display Serial Interface (DSI).
There is more powerful processor and wireless radio devices included, they recommend using more powerful mucro USB power supply. At least capable of driving 2.5A. So you should be careful when powering it from computer USB port. So get a decent power supply adapter or at least use powered USB hub.
This is great but…
No matter ho great Raspberry Pi 3 sounds, but there are still lots of to improve and update. From community reaction we can tell few most expected things in upcoming boards that could also be implemented on version 3:
- USB 3.0 – USB 2.0 is going to be a thing of the past. Wit greater power we also need faster USB transfer speed.
- PoE – Does this sound to much. Powering Raspberry Pi over Ethernet – this would be nice touch giving even more flexibility to deploy internet connected devices using single cable.
- Gbit ethernet – again 10/100 is also some sort of limiting thing for many apps.
- SATA port – We all understand why this sounds attractive, aren’t we?
- More RAM – 2 GB of ram wouldn’t hurt at all. Processing power is getting serous, so this might also be a bottleneck in some situations.
So there are still lots of expectations and hopefully they will be included gradually while trying to keep same price level and software compatibility. Besides this Raspberry Pi 3 is great upgrade with its WiFi native support and greater processing power.