Raspberry Pi Model Zero
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 it might be worth checking out nerves_system_rpi. That image configures the USB port in host mode by default and is probably more appropriate for your setup.
| 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 | Supported on the Pi Zero W |
| 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. The virtual serial
port provides access to the IEx prompt and the Ethernet device can be used for
firmware updates, Erlang distribution, and anything else running over IP.
Supported WiFi devices
The base image includes drivers for the onboard Raspberry Pi Zero W wifi module
(brcmfmac driver). Due to the USB port being placed in gadget mode, this
system does not support USB WiFi adapters.
Linux kernel and RPi firmware/userland
There's a subtle coupling between the nerves_system_br version and the Linux
kernel version used here. nerves_system_br provides the versions of
rpi-userland and rpi-firmware that get installed. I prefer to match them to
the Linux kernel to avoid any issues. Unfortunately, none of these are tagged
by the Raspberry Pi Foundation so I either attempt to match what's in Raspbian
or take versions of the repositories that have similar commit times.
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: This image is from the Fritzing parts library.