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SmallBASIC | android

SmallBASIC for Android guide

The Android version of SmallBASIC comes with a built-in Integrated Development Environment (IDE), you can write programs on your Android-powered tablet or mobile phone and run them instantly.

In the video below the basic steps of creating a file, opening it in the internal editor and executing the program are shown.

Please note, that at the first start of the Android version of SmallBASIC, the editor is turned off. A tap on a program name will start it immediately. If you want to edit the file, please turn on the editor by tapping on the three dots in the lower right corner and choosing the entry Editor [OFF] to enable the editor.

The items displayed depend on whether the file browser, code editor or a running program is active.

When the file browser is active you should see an “Editor” item followed by either [ON] or [OFF]. If it shows “OFF” then press the item to switch it to “ON”.

Before you start editing a program you should navigate to the “SmallBASIC” folder. You can get there by pressing “[Go Up]” until you hit the root level “/”. You should then see an entry for “SmallBASIC”. If there’s not enough room to display the entire text it might appear as something like “storage/emulated/0/SmallBAS~”. You may need to accept a permission request to allow access to this folder when you first launch SmallBASIC for the first time. Also make sure you do not select the internal “net.sourceforge.smallbasic” folder since this could be overwritten in a future SmallBASIC update.

Now press the “[File]” link in the top left corner of the screen. This will take you to the file manager. From here you can enter a file name then press “[New]” to create it. Now press “[<<]” to exit the file manager.

Your new file should be listed in the file browser. Press the file name link. You should finally see the program editor. If the keypad does not appear, press the system menu button and select “Show Keypad”. For best results you may need to install a separate keyboard. “AnySoftKeyboard”, “Hacker’s Key” and “GBoard” all seem to work well.

Start typing out your program. When you are ready to test your program, press the system menu button then select “Run”.

In the help screen, the “>” characters on the left are buttons to expand (or contract) the help item contents. In the editor, the line number display also functions as a scrollbar. If you want to write a quick experimental program you can use the “[Scratch]” option to bypass the above file name setup steps.

All of the above UI elements are written in SmallBASIC, see main.bas

To use the following services, your program must start with the following two lines:

option predef load modules
import android

The first line tell SmallBASIC to dynamically load runtime modules. The second line imports the android module.

GPS_ON

Instructs the system to commence recording location information. Note: This relies on the device location services being enabled by the user.

GPS_OFF

Turns off recording of location information.

LOCATION

Returns a MAP variable holding the following details:

• latitude - the latitude, in degrees.
• longitude - the longitude, in degrees.
• speed - the speed if it is available, in meters/second over ground.
• accuracy - the estimated accuracy of this location, in meters.
• altitude - altitude if available, in meters
• bearing - the bearing, in degrees
• provider - whether data obtained from GPS or network

Note: the location data is updated internally at 1 second intervals.

For more details, see: https://developer.android.com/reference/android/location/Location.html

SENSOR_ON

const SensorAccelerometer = 0
const SensorMagneticField = 1
const SensorGyroscope = 2
const SensorLight = 3
const SensorProximity = 4
android.sensor_on(n)

Enables the given sensor (currently only one may be enabled at a time). Throws an exception if the given sensor is not available (for example, not all devices have a gyroscope).

SENSOR_OFF

Disables any active sensor.

SENSOR

Returns a MAP variable holding sensor details. x, y, z - The spatial position light - (SensorLight) distance - (SensorProximity)

For more details, see:

• http://i.stack.imgur.com/skBui.jpg
• https://developer.android.com/reference/android/hardware/SensorEvent.html

Output data as spoken text.

Notes: - The text to speech module takes a moment to initialise. This is performed the first time you call SPEAK. - You may want to turn off the system setting to send TTS usage statistics to google before using this feature.

TTS_PITCH

Sets the voice pitch (default is 1.0).

TTS_RATE

Sets the rate of speaking (default is 1.0)

TTS_LANG

Sets the locale, for example “en”, “de”, “fr” for English, German, France. May cause the system to download the language codec if not already installed.

TTS_OFF

Turns off text to speech output.

SPEAK

Performs text to speech (default is ENGLISH).

android.request(url, [postData, authToken])

• url: The URL endpoint for the request.
• data (optional): Data to send in the request body. If provided, the request method is POST with Content-Type: application/json. If omitted, the request method defaults to GET.
• token: (optional): Bearer authentication token for a POST request.

The REQUEST function enables making HTTPS requests (either POST or GET methods), supporting secure connections that are not possible with the OPEN command.

Note: For desktop versions, you can utilize the RUN command with curl for similar functionality.

import android

const endpoint = "https://llamafile/v1/chat/completions"
const apiKey = "no-key"

func request(content)
  local post_data
  dim post_data.messages(0 to 1)
  post_data.model = "gpt-3.5-turbo"
  post_data.messages[0].role = "system"
  post_data.messages[0].content = "You are a helpful assistant"
  post_data.messages[1].role = "user"
  post_data.messages[1].content = content
  return array(android.request(endpoint, post_data, apiKey))
end 

while 1
  input "Question: ", prompt
  response = request(prompt)
  print response.choices[0].message.content
wend

The code snippet demonstrates how to use REQUEST to interact with a specified endpoint, providing necessary data and token for authentication.

These functions allow you to connect, send, and receive data over a USB serial connection.

const usb = android.openUsbSerial(vendorId, [baud], [timeout])

Parameters:

• vendorId: (required) The USB device’s Vendor ID.
• baud: (optional) The baud rate for communication (default: 19200).
• timeout: (optional) imeout in milliseconds for receive operations (default: 5000 ms).

Returns:

• A USB serial object to be used with other USB functions.

Closes the current USB connection. Always call this when you’re done using the device.

Returns a string with details about the connected USB device, such as product name or manufacturer info (if available).

Reads incoming data from the connected USB device.

Returns:

A string containing the received data, or an empty string if no data is received before timeout.

Sends data to the connected USB device.

Parameters:

dat – The data to send as a string.

Returns:

The number of bytes successfully sent.

import android
usb = android.openUsbSerial(0x16C0)
while 1
  input k
  n = usb.send(k);
  print "sent "; n
  print usb.receive()
wend

These functions allow you to connect to Bluetooth serial devices, send and receive data, and manage the connection within your SmallBASIC program.

const bt = android.openBluetooth(deviceName)

Parameters:

• deviceName: (required) The Bluetooth device name to connected with.

Returns:

• A Bluetooth object to be used with other Bluetooth functions.

Closes the current Bluetooth connection.

Tip: Always close the connection when you’re done to free resources.

Returns true if the Bluetooth connection is currently open, otherwise false.

Returns a string with details about the Bluetooth connection inclusing name and address (if available).

Reads incoming data from the connected Bluetooth device.

Returns:

A string containing the received data, or an empty string if no data is received before the timeout.

Sends data to the connected Bluetooth device.

Parameters:

dat – The data to send as a string.

Returns:

The number of bytes successfully sent.

import android

bt = android.openBluetooth("TeensyBT")
print "opened"
print bt.description()
for i = 0 to 1000
  if bt.connected() then
    n= bt.send(i)
    delay 10
    print bt.receive(); "   "; i
  else
    print "waiting..."
    delay 3000
  endif
next

This example opens a connection to a device named “TeensyBT”, then continuously sends and receives data in a loop.

• Display the menu, then click Editor [ON]
• Tap a file name in the browser.

• Enter the port number in the setup screen.
• Connect your desktop machine and your mobile device to the same wifi network.
• Launch desktop SmallBASIC.
• Right click and select “Editor [ON]”.
• Navigate to the .bas file then click the link to begin editing.
• Press F3, then enter the address shown in the android about screen (IP:PORT).
• Enter the security code, then press enter.
• Once the settings are successful, you can press F4 to upload your program again.

• Write and debug the program with desktop SmallBASIC.
• Copy the .bas file to your SDCard.
• Launch SmallBASIC, then navigate to the file in the built-in file browser, then tap the link to run.
• or, navigate to the file in the system file browser, then tap the link to start SmallBASIC and run the program.

• Write your SmallBASIC program in a separate editor on your device.
• Task switch to SmallBASIC, then run the program using the built-in file browser.

• Enter the port number in the setup screen.
• Connect your desktop machine and your mobile device to the same wifi network.
• Launch a desktop browser then enter http://:
• A simple web page is displayed. Enter your SmallBASIC program then click run.

• Write and debug the program with desktop SmallBASIC.
• Convert the program to an QRCode image.
• Scan the QRCode in the separate decoder program.
• Click okay to launch SmallBASIC and the encoded program.

Note: the tool to convert source code to QR codes is here: qrcode

PLAY(“file:///sdcard/VoiceRecorder/recordings/hello.mp3”)

Use the PLAY command with the prefix “file://” to play an audio track. For supported formats, see:

https://developer.android.com/guide/appendix/media-formats.html

Android changelog

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