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Hot or cold game project edits (#596)

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docs/projects/hot-or-cold.md
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@ -1,4 +1,4 @@
# Hot Or Cold # Hot or Cold
## @description A Hot-or-Cold treasure hunt game ## @description A Hot-or-Cold treasure hunt game
@ -12,14 +12,14 @@ https://youtu.be/nbRfNug-RkY
## Beacons ## Beacons
In this game, players are looking for hidden @boardname@ that emit radio signals. In this game, players are looking for a hidden @boardname@ that emits a radio signal.
The hidden @boardname@ are called **beacons**. Hidden @boardname@s are called **beacons**.
## Setting up the radio ### Setting up the radio
We set the radio group to ``1`` to make sure all the players are using the same group. We set the radio group to ``1`` and all the players use the same group.
We also tell the @boardname@ to transmit its serial number (that's a unique number that identifies it) The @boardname@ transmits its serial number (that's a unique number that identifies it)
so that the player can tell apart each beacon. We also reduce the power of the antenna to reduce the range of transmission. so that players can tell one beacon apart from another. Also, the power of the antenna is reduced to shorten the range of transmission.
```block ```block
radio.setGroup(1) radio.setGroup(1)
@ -27,12 +27,9 @@ radio.setTransmitSerialNumber(true)
radio.setTransmitPower(6) radio.setTransmitPower(6)
``` ```
## Beacon gotta beam ### Beacon gotta beam
The beacon simply needs to send a radio message every now and then. To pace it out,
we add some ``|show icon|`` blocks to animate the screen.
The beacon just needs to send a radio message every now and then. So, to pace the transmits and give some visual feedback, we add some ``||basic:show icon||`` blocks to animate the screen.
```blocks ```blocks
basic.forever(() => { basic.forever(() => {
@ -45,18 +42,17 @@ radio.setTransmitSerialNumber(true)
radio.setTransmitPower(6) radio.setTransmitPower(6)
``` ```
## Hide the beacons ### Hide the beacons
Download the code to your beacon @boardname@ and hide them! Download the code to each beacon @boardname@ and hide them!
## Hunters ## Hunters
The hunter @boardname@ look for beacons. The hunter @boardname@ looks for beacons.
## Is the beacon close? ### Is the beacon close?
To determine how far or close, we use the signal strength of each radio packet sent by the beacons. The signal To determine how far away or how close they are, we use the signal strength of each radio packet sent by the beacons. The signal strength ranges from ``-128db`` (weak) to ``-42db`` (very strong).
strength ranges from ``-128db`` (weak) to ``-42db`` (very strong).
```blocks ```blocks
radio.onDataPacketReceived( ({ receivedNumber, signal }) => { radio.onDataPacketReceived( ({ receivedNumber, signal }) => {
@ -65,19 +61,27 @@ radio.onDataPacketReceived( ({ receivedNumber, signal }) => {
radio.setGroup(1) radio.setGroup(1)
``` ```
Take notes of the values as you move around the beacon. Test and record the signal values as you move around a beacon, moving closer and farther away:
* hot signal value: ``_________________`` | | |
* mild signal value: ``_________________`` |-|-|
* cold signal value: ``_________________`` | Hot signal value: | ``_________________`` |
| Warm signal value: | ``_________________`` |
| Cold signal value: | ``_________________`` |
## Hot or cold? ### Hot or cold?
The hunter screen displays ``SmallDiamond`` on the screen if the beacon is far, ``Diamond`` mildly close and ``Square`` if it is close. Use the ``signal`` values collected in the previous step to determine when to show those letters. The hunter's screen will display:
Here is an example that uses ``-95`` and less for cold, between ``-95`` and ``-80`` for mild and above ``-80`` for hot. Use your own values based on the room setup or the hidding place. * ``SmallDiamond``: if the beacon is far (cold).
* ``Diamond``: if the beacon is relatively close (warm).
* ``Square``: if the beacon is really close (hot).
To make the program more responsive, we add a ``|led stop animation|`` to cancel any icon animation when a new beacon packet comes. Use the ``signal`` values collected in the previous step to determine when to show each icon.
Here is an example that uses ``-95`` or less for cold, between ``-95`` and ``-80`` for warm, and ``-80`` or above for hot. You can change these values to account for your room setup or conditions of your hidding place.
To make the program more responsive, add a ``||led:stop animation||`` to cancel icon animations when a new beacon packet comes in.
```blocks ```blocks
radio.onDataPacketReceived( ({ receivedNumber, signal }) => { radio.onDataPacketReceived( ({ receivedNumber, signal }) => {
@ -95,26 +99,25 @@ radio.setGroup(1)
Download the code and play the game! Download the code and play the game!
## Extra: Multiple beacons ## Expand the game: multiple beacons
We're making the game more interresting by counting how many beacons a player has seen so far. We'll making the game more interesting by counting how many beacons the hunting player has seen so far.
## Remember the beacons ### Remember the beacons
Remember that the beacon was configured to transmit its serial number? We can use this information Do you remember that the beacon was configured to transmit its serial number? We can use this information
to determine if we've visited a beacon for the first time. to determine if a beacon is new or if it's one we've seen before.
To do so, we are going to add an **array** variable that will hold all the beacon serial numbers seen so far. To do so, we add an **[array](/types/array)** variable that will hold all the beacon serial numbers seen so far.
```block ```block
let beacons: number[] = [0] let beacons: number[] = [0]
``` ```
Whenever we receive a new packet, we are going to check if the ``beacons`` already Whenever we receive a new packet, we are going to check if the ``beacons`` array already
contains the serial number. If not, we add the serial number at the end of ``beacons`` and increment the ``|game score|``. contains the serial number. If not, we add the serial number at the end of ``beacons`` and increment the ``||game:score||``.
To check if an ``array`` contains an element, we use the ``|find index of|`` block which returns ``-1`` To check if an array contains an certain element, we use the ``||arrays:find index of||`` block which returns ``-1`` if the element is not found.
if the value is not found.
```blocks ```blocks
let beacons: number[] = [0] let beacons: number[] = [0]
@ -127,9 +130,9 @@ radio.onDataPacketReceived( ({ receivedNumber, signal, serial }) => {
}) })
``` ```
## Show my score ### Show my score
To see the current score, we add a ``|on button pressed|`` that displays the score on screen when ``A`` is pressed. To see the current score, we add an ``||input:on button pressed||`` that displays the score on the screen when the **A** button is pressed.
```block ```block
input.onButtonPressed(Button.A, () => { input.onButtonPressed(Button.A, () => {
@ -137,9 +140,9 @@ input.onButtonPressed(Button.A, () => {
}) })
``` ```
## All together ### All together
The hunter code with all th pieces together looks like this now. Download it and try it out with multiple beacons! The hunter code with all th pieces together looks like this now. Download and try it out with multiple beacons!
```blocks ```blocks
let beacons: number[] = [0]; let beacons: number[] = [0];