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nerves_system_rpi0

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Nerves System - Raspberry Pi Zero and Zero W

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README.md 

# Raspberry Pi Model Zero



This is the base Nerves System configuration for the Raspberry Pi Zero and

Raspberry Pi Zero W.



![Fritzing Raspberry Pi Zero image](assets/images/raspberry-pi-model-zero.png)

<br><sup>[Image credit](#fritzing)</sup>



| Feature              | Description                     |

| -------------------- | ------------------------------- |

| CPU                  | 1 GHz ARM1176JZF-S              |

| Memory               | 512 MB                          |

| Storage              | MicroSD                         |

| Linux kernel         | 4.4 w/ Raspberry Pi patches     |

| IEx terminal         | OTG USB serial port (`ttyGS0`). Can be changed to HDMI or UART. |

| GPIO, I2C, SPI       | Yes - Elixir ALE                |

| ADC                  | No                              |

| PWM                  | Yes, but no Elixir support      |

| UART                 | 1 available - `ttyAMA0`         |

| Camera               | Yes - via rpi-userland          |

| Ethernet             | Yes - via OTG USB port          |

| WiFi                 | Pi Zero W or IoT pHAT           |

| Bluetooth            | Not supported yet               |



## Supported OTG USB modes



The base image activates the `dwc2` overlay, which allows the Pi Zero to appear as a

device (aka gadget mode). When plugged into a host computer via the OTG port, the Pi

Zero will appear as a composite ethernet and serial device.



When a peripheral is plugged into the OTG port, the Pi Zero will act as USB host, with

somewhat reduced performance due to the `dwc_otg` driver used in other base systems like

the official `nerves_system_rpi`.



## Supported WiFi devices



The base image includes drivers for the Red Bear IoT pHAT and the onboard

Raspberry Pi Zero W wifi module (`brcmfmac` driver).



If you are using another WiFi module (for example, a USB module), you will

need to create a custom system image. Before doing this, check if the

[nerves_system_rpi](https://github.com/nerves-project/nerves_system_rpi) works

better for you. That image configures the USB port in host mode by default and

is probably more appropriate for your setup.



## Installation



Add `nerves_system_rpi0` to your list of dependencies in mix.exs:



```

  def deps do

    [{:nerves_system_rpi0, "~> 0.12.0"}]

  end

```

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