General information about the WiPy

WLAN default behaviour

When the WiPy boots with the default factory configuration starts in Access Point mode with ssid: wipy-wlan and key: Connect to this network and the WiPy will be reachable at In order to gain access to the interactive prompt, open a telnet session to that IP address on the default port (23). You will be asked for credentials: login: micro password: python

Local file system and SD card

There is a small internal file system (a drive) on the WiPy, called /flash, which is stored within the external serial flash memory. If a micro SD card is hooked-up and enabled, it is available as /sd.

When the WiPy boots up, it always boots from the located in the /flash file system. If during the boot process the SD card is enabled and it’s selected as the current drive then the WiPy will try to execute that should be located in the SD card.

The file system is accessible via the native FTP server running in the WiPy. Open your FTP client of choice and connect to: user: micro password: python

Boot modes

If you power up normally, or press the reset button, the WiPy will boot into standard mode: the file will be executed first, then will run.

You can override this boot sequence by pulling GPIO28 up during reset. The heart beat LED will flash slowly 3 times to signal that safe boot is being requested, and then 3 more times quickly to let you know that safe boot is going to be performed. While safe booting, the WiPy runs the factory firmware and skips the execution of and This is useful to recover from any crash situation.

The heart beat LED

By default the heart beat LED flashes once every 5s to signal that the system is alive. This can be overridden through the HeartBeat class:


There are currently 2 kinds of errors that you might see:

  1. If the heart beat LED flashes quickly, then a Python script(eg has an error. Use the REPL to debug it.
  2. If the heart beat LED stays on, then there was a hard fault, you cannot recover from this, the only way out is by pressing the reset switch.