67 lines
1.6 KiB
Markdown
67 lines
1.6 KiB
Markdown
# Receive Number
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> Note: This API has been deprecated! Use [on data packet received](/reference/radio/on-data-packet-received) instead.
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Receives the next number sent by a micro:bit in the same ``radio`` group.
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```sig
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radio.receiveNumber();
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```
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### Returns
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* the first [number](/reference/types/number) that the micro:bit received. If it did not receive any numbers, this function will return `0`.
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### Example: Simple number receiver
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This example receives the number broadcasted another micro:bit and shows it
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as a bar graph.
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```blocks
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radio.onDataReceived(() => {
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led.plotBarGraph(radio.receiveNumber(), 1023);
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})
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```
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### Example: Light level receiver
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This example shows the light level from the [light level sender example](/reference/radio/send-number)
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as a number.
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```blocks
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radio.setGroup(99)
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basic.forever(() => {
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let level = radio.receiveNumber()
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basic.showNumber(level)
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})
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```
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### Example: Mailbot
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This example receives the light level from the [light level sender example](/reference/radio/send-number)
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and shows a text string like **ALERT** if the light level becomes much brighter.
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To find when the mail arrives, you can put the light level sender in your mailbox and it will
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tell you when someone opens the box. You can try this with a normal
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box too, like a present for a friend.
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```blocks
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radio.setGroup(99)
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let max = 0
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basic.forever(() => {
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let level = radio.receiveNumber()
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if (level > max) {
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max = level
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}
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if (max > 10) {
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basic.showString("ALERT")
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}
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})
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```
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### See also
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[send number](/reference/radio/send-number), [on data received](/reference/radio/on-data-received)
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```package
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radio
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``` |