Support for Hacking STEM activities in micro:bit. For Hacking Stem activities you will need excel add-on Data Streamer as well. To download Data Streamer click here. This extension helps build the code for emitting serial data in the format required by Data Streamer excel addon.
Go to https://makecode.microbit.org, click on the gearwheel menu and select Extensions
, search for hacking stem
and select this extension. Once you load the extension you should see a new category named DataStreamer. Hacking Stem extension sets the baud rate of serial output to 9600 as required by data streamer add-on in excel.
Following are the API reference:
The ||dataStreamer.writeNumber||
block writes a number to the serial port as a floating point number.
dataStreamer.writeNumber(1.52, 2);
value
is the floating point number to write to the serial portdecimal digits
is the number of decimal digits to write. Default is 2.
For example,
dataStreamer.writeNumber(1.52);
writes the following number to serial 1.52
This example reads the analog signal on pin P0
, scales it to 3.3v and writes it to serial with 4 decimal digits precision.
let mv = 0
basic.forever(() => {
mv = pins.analogReadPin(AnalogPin.P0) * 3.3 / 1023
dataStreamer.writeNumber(mv,4)
})
The ||dataStreamer.writeString||
block writes a new line to the serial port.
dataStreamer.writeLine();
This program writes a series of accererlation values to the serial port repeatedly.
basic.forever(function () {
dataStreamer.writeNumber(input.acceleration(Dimension.X))
dataStreamer.writeLine()
})
The ||dataStreamer.writeString||
block writes a string to the serial port, without starting a new line afterward.
dataStreamer.writeString(",");
text
is the string to write to the serial port
This program writes a comma ,
seperated x,y,z acceleration values to the serial port repeatedly..
basic.forever(function () {
dataStreamer.writeNumber(input.acceleration(Dimension.X))
dataStreamer.writeString(",")
dataStreamer.writeNumber(input.acceleration(Dimension.Y))
dataStreamer.writeString(",")
dataStreamer.writeNumber(input.acceleration(Dimension.Z))
dataStreamer.writeLine()
})
The ||dataStreamer.writeNumberArray||
block writes a array of numbers to the serial port as a comma seperated values, without starting a new line afterward.
dataStreamer.writeNumberArray([0,1,2]);
text
is the string to write to the serial port
This program writes a comma ,
seperated x,y,z acceleration values to the serial port repeatedly.
let acc: number[] = []
basic.forever(function () {
acc[0] = input.acceleration(Dimension.X)
acc[1] = input.acceleration(Dimension.Y)
acc[2] = input.acceleration(Dimension.Z)
dataStreamer.writeNumberArray(acc)
dataStreamer.writeLine()
})
The ||dataStreamer.setBaudRate||
sets the baud rate. Default is 9600 for datastreamer
dataStreamer.setBaudRate(9600);
rate
is the number for the baud rate
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