MicroBit Bluetooth UART

[J_Almer]

Dear Sebastian and colleagues,

in the curriculum of bavaria we should characterize solar cells. So i was thinking of using the Micro:Bit as external sensor.
The Micro:Bit should measure the Rotation and the Voltage on Pin 0 and i would get ideally the sine wave.

I used your wonderful project of measuring voltage on Pin0 and this is working with Micro:Bit and PhyPhox. By using the Flashlight of the Smartphone, you just need some cable, a battery pack and the microbit (see attachement).

But the Micro:Bit has no Characteristic for the Rotation. So i thought of using Overview Characteristics.
With the attached programme i was able to receive the Rotation with BLExplorer (see screenshot), but i failed with PhyPhox.

PhyPhox connects, but nothing is displayed.

Code:

<phyphox version="1.6">
    <title>micro:bit UART</title>
    <category>Bluetooth</category>
    <description>Read UART form micro:bit</description>
    <data-containers>
        <container size="0">rot</container>
        <container size="0">rotcal</container>
        <container size="0">t</container>
    </data-containers>
    <input>
        <bluetooth name="BBC micro:bit">
            <output char="6E400002-B5A3-F393-E0A9-E50E24DCCA9E" conversion="string">rot</output>
            <output char="6E400002-B5A3-F393-E0A9-E50E24DCCA9E" extra="time">t</output>
        </bluetooth>
    </input>
    <views>
        <view label="Raw Data">
            <graph minY="0" scaleMinY="fixed" maxY="90" scaleMaxY="fixed" labelX="time" unitX="s" labelY="Rotation" unitY="V">
                <input axis="x">t</input>
                <input axis="y">rotcal</input>
            </graph>
            <value size="3" unit="DEG" label="Rotation">
                <input>rotcal</input>
            </value>
        </view>
    </views>
    <analysis>
        <multiply>
            <input clear="false">rot</input>
            <input type="value">1.00</input>
            <output>rotcal</output>
        </multiply>
    </analysis>
</phyphox>

Thanks for your help.


Best wishes Johannes