Build Instructions

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• 1

  Step 1) Set up micro:bit

  Micro:bit is a tiny computer which empowers anyone at all skill levels to create exciting electronics projects. It includes microphone, gyroscope, accelerometer, temperature sensor, light sensor and other features. In this example we are going to use the microphone to detect clicking fingers or any other high volume noise. Once the sound is detected we are going to:

  • Display the Heart icon on the LED display
  • Set the P0 pin to "1" for a short period of time (1 second) - to wake up Cricket WiFi moduleto send a notification to a phone

  Let's go and create the program in https://makecode.microbit.org/ as shown below:

  Here is our complete project: https://makecode.microbit.org/_3gr76PCMDXKh

  Once the program is ready we need to put it on our micro:bit with the following steps:

  • Click the "Download" button and save the program on the local disk
  • Connect micro:bit via USB to PC (MICROBIT drive should appear)
  • Copy/Paste the downloaded program to MICROBIT drive (micro:bit should be flashing LED when performing the copying)

  Our micro:bit is ready! We can test it by clicking fingers and see if the heart icon shows up on the LED display. If yes, we can disconnect from USB and move on to the next step.

  For more information how to get started with micro:bit please check out this official guide how to get started with micro:bit. We were inspired to do this project with the sound input tutorials which you might also like to check.

• 2

  Step 2) Assembly

  In this step we are going to connect all the components together with the following steps:

  • Connect micro:bit to the batteries
  • Connect Cricket to the batteries (we peel out the coat from the cables to connect Cricket on the same power source)
  • Connect micro:bit's P0 pin to Cricket's WAKE_UP pin [green cable]

  A complete project assembly may look like this:

• 3

  Step 3) Setup Pushsafer

  Pushsafer, we learned, is one of the easiest and reliable internet service which provides multi-platform push notifications. There is some free allowance of notifications but we quickly ran out of it and had to purchase 1000 extra notifications for ~$1. It is very cheap for what it gives you back and it is super simple to set up:

  • Go to pushsafer.com
  • Open an account
  • Create a notification message
  • Generate a URL link and save it somewhere (we will need this link to copy/paste to Cricket's configuration in the next step)
  • Install mobile app on your phone (iPhone or Android) and login with the same account

  Below there is a screenshot of how we created an example message:

  Now we can press the "Send Message" button and, if everything is configured correctly, we should receive a message: "Microbit: Hello from Cricket!" on our phone.

  Please do not forget to press the "Create Link" button and save the URL address as we will need this to configure Cricket In the next step.

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