Get an SD card

Your facilitator will give you a stemclub firmware card. Put the SD card into the Pi

put the SD card into the PI

Add Power to the Pi

Your Pi can be powered from a wall wart or from a powerbank.

SAs - get me a picture please

The rainbow of success

Once the pi is connected to the power bank, the SenseHat will display a rainbow screen while it boots. The SenseHat will then go blank before displaying the letter ‘K’. Congratulations, your Pi is working

Rainbow of success After boot

Controlling from the SenseHat

how to hold

The Pi Operates in “portrait mode” with the leds towards the bottom

Front of Pi Back of Pi

left and right, click in and click out

The tiny “joystick” towards the right of the sense hat is how you control the Pi.

  • Left and right will move between commands
  • Push in will execute command or exit command (if one is running)
  • Up will take a picture in happy snap mode

Joystick location

Happy Snaps

Start the camera mode (which is called “Happy Snaps”) by pressing the moving left or right until you see the “H”, then clicking in on the joystick.

The sense hat will display a very low resolution preview of the camera view - try it out to convince yourself.

Pressing up on the joystick will capture an image just like hitting the shutter button on a camera.

How long does your Pi last on the powerbank

Grab a powerbank, look on it to see how many milliamps it is. Plug in your pi, start the happy snap command and wait. Start a timer and see how long the Pi runs for. Minutes? Hours? Days? I suggest you put it somewhere you can keep an eye on it.

In your lab book, note the time you got for your powerbank and the number of milliamps in your powerbank (I hope it was full when you started).

reference list of commands

  • H: Happy snaps - shows a low-res preview and pressing up will capture a picture
  • S: Stream the video on the network
  • D: Show how much disk space is left
  • N: Show network details
  • R: Make up a new network name (caution!)
  • B: Switch to base mode (caution!)
  • F: Switch to field mode (caution!)
  • T: Capture training data
  • K: Sync data (not implemented yet)
  • lower case letters: AI models you can run.