# Raspberry Pi 3 Model B
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This is the base Nerves System configuration for the Raspberry Pi 3 Model B.

![Fritzing Raspberry Pi 3 image](assets/images/raspberry-pi-3-model-b.png)
<br><sup>[Image credit](#fritzing)</sup>

| Feature              | Description                     |
| -------------------- | ------------------------------- |
| CPU                  | 1.2 GHz quad-core ARMv8         |
| Memory               | 1 GB DRAM                       |
| Storage              | MicroSD                         |
| Linux kernel         | 4.4.50 w/ Raspberry Pi patches  |
| IEx terminal         | HDMI and USB keyboard (can be changed to UART)   |
| GPIO, I2C, SPI       | Yes - Elixir ALE                |
| ADC                  | No                              |
| PWM                  | Yes, but no Elixir support      |
| UART                 | 1 available - ttyS0             |
| Camera               | Yes - via rpi-userland          |
| Ethernet             | Yes                             |
| WiFi                 | Yes - Nerves.Network            |
| Bluetooth            | Not supported yet               |

## Supported WiFi devices and firmware

WiFi modules almost always require proprietary firmware to be loaded for them to work. The
Linux kernel handles this and firmware blobs are maintained in the
`linux-firmware` project. The firmware for the built-in WiFi module on the RPi3
hasn't made it to the `linux-firmware` project nor Buildroot, so it is included
here in a `rootfs_overlay` overlay directory. The original firmware files came from
https://github.com/RPi-Distro/firmware-nonfree/blob/master/brcm80211/brcm.

[Image credit](#fritzing): This image is from the [Fritzing](http://fritzing.org/home/) parts library.