# Raspberry Pi Model Zero
[](https://circleci.com/gh/nerves-project/nerves_system_farmbot_rpi0)
[](https://hex.pm/packages/nerves_system_farmbot_rpi0)
This is the base Nerves System configuration for the Raspberry Pi Zero and
Raspberry Pi Zero W.
If you are *not* interested in [Gadget Mode](http://www.linux-usb.org/gadget/) it might be worth checking out [nerves_system_rpi](https://github.com/nerves-project/nerves_system_rpi).
That image configures the USB port in host mode by default and
is probably more appropriate for your setup.
<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_farmbot_rpi0` to your list of dependencies in mix.exs:
```
def deps do
[{:nerves_system_farmbot_rpi0, "~> 0.16.0"}]
end
```
[Image credit](#fritzing): This image is from the [Fritzing](http://fritzing.org/home/) parts library.
