picoTracker FAQs
Which firmware version should I use?
For the v2 PCB sets purchased on the xiphonics store please be sure to use the LATEST v2 "ST7789" release firmware (currently beta versions).
Also please make sure to install the latest release of the firmware when you build your picoTracker as the firmware installed on the PCB may not be the latest version and could have issues that have been fixed in newer versions of the firmware.
What LCD do I need and where can I buy one?
You need a 2.8in HP28008-D (40pin 0.5pitch SPI 320x240 ST7789). These can be purchased from a variety of vendors online. One example vendor is here (the "IPS Screen No Touch" option), but please note we don't recommend or endorse any specific vendors.
What filament should I use for printing the case?
For best durablity we would suggest ABS though PLA is generally the best in our experience in terms of detail, precision but it has a low melting point, so could bend if left in very hot places like your car in the summer.
Where can I get the case printed if I don't have access to a 3D printer?
We don't specifically recommend them because we haven't used them for 3D printing, but JLCPCB has a 3D print service as does PCBWay.
Which Key switches should I use?
The keypad PCB only supports cherry low profile compatible and kailh low profile choc switches (not choc v2!). Alot of vendors online sell these switches and matching keycaps. To help you get started here are example cherry and kailh vendors but again please note we don't recommend or endorse any specific vendors.
I installed the LCD in to the main PCB but I don't see anything on the screen?
Please follow this check list to try to diagnose the problem:
- Try the procedure to load the latest firmware release, if this works move on to next step. To boot into the usb flashing mode, hold down the button on the bottom of the PCB (near the power switch) while turning on the picoTracker with the power switch. Then insert USB cable connected to your computer and you should see the picoTracker mount on your computer as a USB drive.
- As of firmware v2.0-Beta8, remote UI is enabled by default, so you if you insert a compatible SDCard, you can turn on the pT with plugged in via USB to a computer running a Chrome-based web browser and try to connect to the pT using the remote ui webapp. If you are able to see the remote UI webapp displaying the picoTracker UI, you know that the main PCB is operating and can move on to the next step.
- Check that you have connected the LCD flex cable in the correct orientation. Also check that the flex cable is fully inserted into the connector and is gripped firmly by the connector.
Finally make sure that you are using a compatible LCD model (see previous question above for the required compatible LCD model). - If you still don't see anything displayed on the LCD, please contact us using the "Chat" button in the bottom right corner of this page.