2.1.28, initiation update to PXT v5.28.24 (#54)

docs/reference/serial/write-numbers.md

@@ -0,0 +1,45 @@
+# Serial Write Numbers
+
+Write an array of numbers to the [serial](/device/serial) port.
+
+```sig
+serial.writeNumbers([0, 1, 2]);
+```
+
+Instead of writing a single number at a time using [write number](/reference/serial/write-number), you can write multiple numbers to the serial port at once. They are written as _Comma Separated Values (CSV)_.
+
+You can write the numbers `0` through `5` together and they will appear as one line of serial output:
+
+``0,1,2,3,4,5``
+
+This makes a line of CSV data where the commas between the numbers are the separators for each value.
+
+## Parameters
+
+* `values`: the array of [numbers](/types/number) to write to the serial port
+
+## Example: one two three
+
+This program repeatedly writes a 3-number array to the serial port.
+
+```blocks
+basic.forever(() => {
+    serial.writeNumbers([1, 2, 3]);
+    basic.pause(5000);
+});
+```
+
+## Example: plot temperature and light
+
+```blocks
+serial.writeLine("temp,light")
+basic.forever(() => {
+    serial.writeNumbers([input.temperature(), input.lightLevel()])
+})
+```
+
+## See also
+
+[serial](/device/serial),
+[serial write line](/reference/serial/write-line),
+[serial write value](/reference/serial/write-value)