MicroPython Forum (Archive)

VUSB feeds VIN through a diode and fuse. The safest thing to do is connect your 5V supply through another diode to VIN. That way the two diodes block any cross feed of power between your power supply and your PC's USB port, but VIN will always get power.

If you are doing another run of boards it would be worth hand routing a GND track on each side of CLK.

It's possible you have a crosstalk problem between CLK and CMD. On the board that works these signals change to bottom or inner layer so I can't see their routing. On the new board CLK and CMD are routed very close together for most of their run. On the pyboard there is a guard trace (GND) on each s...

In days of old when Wi-Fi wasn't invented and nor were PIR detectors burglar alarms had reed switches on doors and mechanical vibration switches on windows. A vibration switch could wake up a device from sleep mode.

You could try adding solder bumps to the pads like a BFA. Try to get a lump of solder 1mm high on each pad of the WSON. Then tin the PCB pads with solder. Use liquid or paste flux on the pads and place the chip. With a very fine tip melt the solder bumps and that will flow into the pads and bond. Th...

You need to install the full MSYS2, not just make. There are various utils like SED that are needed. You need to set the MSYS2 path before windows\system32 because it has to replace some Windows utilities. I find it easier to use WSL for building MicroPython with Windows tools for managing source co...

You can add UART REPL in mpconfigport.h. See NUCLEO_F411RE port for an example. For Linux use rshell to copy scripts to the flash. I use Thonny on Windows. There are discussions on the forum about other IDEs and plugins. For production you can use JTAG to read out a complete flash image and clone it...

Have a look at uasyncio cooperative multi-tasking and Peter Hinch's tutorials. There is lots of discussion on the forum and GitHub

You should be able to swap antennae. They are all 50 ohm and same frequency. I have used quite a few different types. If you want to compare antennae find an app that displays all satellites in view and run both antennae at the same time using two modules. Look at the number of satellites found and ...

Edit the pin assignment in mpconfigboard.h for your port and rebuild MicroPython