Last Updated on April 5, 2023 by pg@petergamma.org
- Raspberry Pi Zero 2W touch display works over HDMI if connected to th usb2 port of a device running Raspberry Pi OS
- With a Raspberri Pi 4 running Ubuntu Mate with a similar setup touch did not work
- the Raspberry Pi Zero 2 W has 2 usb3 connectors, one can be used for powering the device, one to connect a usb2 connection to the display
- in this instruction, a usb2 hub is added additionally
- the usb2 connection to the HDMI display is routed through the hub, this is used for powering the display and for touch control
- this setup shows that a Raspberry Pi Zero 2 W works with a 7 inch display, touch works, a usb2 hub was added, too and a usb keyboard
- this is a similar setup as as the one from the Raxda zero off-road mini PC:
- With the Raspberry Pi Zero 2W we have a demo that the discussed components work with Raspberri Pi OS, with the demo of the off-road mini PC running Debian we do not have a demo which proofs that these peripherals work with the device.
- The Raspberry Pi Zero 2W has only one usb2 connector. In this demo, an additionial usb hub was added.
- There are also usb2 shield available for device incl. housing on Aliexpress which is great:
- If these kind of special components and housing are developed for the Raspberry Pi Zero 2W, is this not a proof that this device is interesting for developers?
- But the question arrises if it is wise to use these peripherals with this low power single board computer
- Is it not better to use as little peripherals as possible it you need long battery life as we need it?
- For the Raxda Zero, although it attracted before our attention because of the better specifications, we miss demos for such peripherals.
- This demo shows that it is possible to add a usb keyboard and then most probably also a mouse, and mouse and keyboard are working.
- But is it not the easiest solution to have your data on a storage card, use the device for mobile data acquisition, pull out the storage card from the device, stick it into your desktop PC and do any further data processing there?
- Do you want to use a device which is that small as a desktop PC for your daily work?
- This demo shows that the features we are looking for with the Raspberry Pi zero w 2 are working. Before this demo, we did not know about this with this device, and ist is nice to have a demo of someone who tests exactly what we are interested in.