supervisor – Supervisor settings

Available on these boards
  • 01Space 0.42 OLED ESP32C3
  • 0xCB Helios
  • 42. Keebs Frood
  • 8086 Commander
  • 8086 USB Interposer
  • @sarfata shIRtty
  • AITHinker ESP32-C3S_Kit
  • AITHinker ESP32-C3S_Kit_2M
  • ARAMCON Badge 2019
  • ARAMCON2 Badge
  • ATMegaZero ESP32-S2
  • Adafruit BLM Badge
  • Adafruit CLUE nRF52840 Express
  • Adafruit Camera
  • Adafruit Circuit Playground Bluefruit
  • Adafruit Circuit Playground Express 4-H
  • Adafruit CircuitPlayground Express
  • Adafruit CircuitPlayground Express with Crickit libraries
  • Adafruit CircuitPlayground Express with displayio
  • Adafruit EdgeBadge
  • Adafruit Feather Bluefruit Sense
  • Adafruit Feather ESP32 V2
  • Adafruit Feather ESP32-C6 4MB Flash No PSRAM
  • Adafruit Feather ESP32-S2 Reverse TFT
  • Adafruit Feather ESP32-S2 TFT
  • Adafruit Feather ESP32-S3 Reverse TFT
  • Adafruit Feather ESP32-S3 TFT
  • Adafruit Feather ESP32S2
  • Adafruit Feather ESP32S3 4MB Flash 2MB PSRAM
  • Adafruit Feather ESP32S3 No PSRAM
  • Adafruit Feather HUZZAH32
  • Adafruit Feather M0 Adalogger
  • Adafruit Feather M0 Basic
  • Adafruit Feather M0 Express
  • Adafruit Feather M0 Express with Crickit libraries
  • Adafruit Feather M0 RFM69
  • Adafruit Feather M0 RFM9x
  • Adafruit Feather M4 CAN
  • Adafruit Feather M4 Express
  • Adafruit Feather MIMXRT1011
  • Adafruit Feather RP2040
  • Adafruit Feather RP2040 Adalogger
  • Adafruit Feather RP2040 CAN
  • Adafruit Feather RP2040 DVI
  • Adafruit Feather RP2040 Prop-Maker
  • Adafruit Feather RP2040 RFM
  • Adafruit Feather RP2040 Scorpio
  • Adafruit Feather RP2040 ThinkInk
  • Adafruit Feather RP2040 USB Host
  • Adafruit Feather RP2350
  • Adafruit Feather STM32F405 Express
  • Adafruit Feather nRF52840 Express
  • Adafruit Floppsy RP2040
  • Adafruit FunHouse
  • Adafruit Gemma M0
  • Adafruit Gemma M0 PyCon 2018
  • Adafruit Grand Central M4 Express
  • Adafruit HUZZAH32 Breakout
  • Adafruit Hallowing M4 Express
  • Adafruit ItsyBitsy ESP32
  • Adafruit ItsyBitsy M0 Express
  • Adafruit ItsyBitsy M4 Express
  • Adafruit ItsyBitsy RP2040
  • Adafruit ItsyBitsy nRF52840 Express
  • Adafruit KB2040
  • Adafruit LED Glasses Driver nRF52840
  • Adafruit Macropad RP2040
  • Adafruit MagTag
  • Adafruit Matrix Portal M4
  • Adafruit MatrixPortal S3
  • Adafruit Metro ESP32S2
  • Adafruit Metro ESP32S3
  • Adafruit Metro M0 Express
  • Adafruit Metro M4 Airlift Lite
  • Adafruit Metro M4 Express
  • Adafruit Metro RP2040
  • Adafruit Metro RP2350
  • Adafruit Metro nRF52840 Express
  • Adafruit Monster M4SK
  • Adafruit NeoKey Trinkey M0
  • Adafruit NeoPixel Trinkey M0
  • Adafruit Pixel Trinkey M0
  • Adafruit ProxLight Trinkey M0
  • Adafruit PyGamer
  • Adafruit PyPortal
  • Adafruit PyPortal Pynt
  • Adafruit PyPortal Titano
  • Adafruit PyRuler
  • Adafruit Pybadge
  • Adafruit QT Py ESP32 PICO
  • Adafruit QT Py ESP32-S3 4MB Flash 2MB PSRAM
  • Adafruit QT Py ESP32-S3 no psram
  • Adafruit QT Py ESP32C3
  • Adafruit QT Py ESP32S2
  • Adafruit QT Py M0
  • Adafruit QT Py M0 Haxpress
  • Adafruit QT Py RP2040
  • Adafruit QT2040 Trinkey
  • Adafruit Rotary Trinkey M0
  • Adafruit SHT4x Trinkey M0
  • Adafruit Slide Trinkey M0
  • Adafruit TRRS Trinkey M0
  • Adafruit Trellis M4 Express
  • Adafruit Trinket M0
  • Adafruit Vindie S2
  • Adafruit-Qualia-S3-RGB666
  • Ai Thinker ESP32-CAM
  • AloriumTech Evo M51
  • Archi RP2040
  • Arduino MKR Zero
  • Arduino MKR1300
  • Arduino Nano 33 BLE
  • Arduino Nano 33 BLE Rev2
  • Arduino Nano 33 IoT
  • Arduino Nano ESP32
  • Arduino Nano RP2040 Connect
  • Arduino Zero
  • Artisense Reference Design RD00
  • AtelierDuMaker nRF52840 Breakout
  • AutosportLabs-ESP32-CAN-X2
  • BARDUINO 4.0.2
  • BBQ20KBD
  • BDMICRO VINA-D51
  • BLE-SS dev board Multi Sensor
  • BLING!
  • BLOK
  • BPI-Bit-S2
  • BPI-Leaf-S3
  • BPI-PicoW-S3
  • BastBLE
  • BastWiFi
  • Bee-Data-Logger
  • Bee-Motion-S3
  • Bee-S3
  • BlizzardS3
  • BlueMicro833
  • BlueMicro840
  • Bradán Lane STUDIO Explorer Badge
  • COSMO-Pico
  • CP Sapling M0
  • CP Sapling M0 w/ SPI Flash
  • CP32-M4
  • CRCibernetica IdeaBoard
  • Capable Robot Programmable USB Hub
  • Cedar Grove StringCar M0 Express
  • Challenger NB RP2040 WiFi
  • Challenger RP2040 LTE
  • Challenger RP2040 LoRa
  • Challenger RP2040 SD/RTC
  • Challenger RP2040 SubGHz
  • Challenger RP2040 WiFi
  • Challenger RP2040 WiFi/BLE
  • Challenger+ RP2350 BConnect
  • Challenger+ RP2350 WiFi6/BLE5
  • Circuit Playground Express Digi-Key PyCon 2019
  • CircuitART Zero S3
  • CircuitBrains Basic
  • CircuitBrains Deluxe
  • ColumbiaDSL-Sensor-Board-V1
  • CrumpS2
  • Cytron EDU PICO W
  • Cytron IRIV IO Controller
  • Cytron MOTION 2350 Pro
  • Cytron Maker Feather AIoT S3
  • Cytron Maker Nano RP2040
  • Cytron Maker Pi RP2040
  • Cytron Maker Uno RP2040
  • DFRobot Beetle ESP32-C3
  • DFRobot FireBeetle 2 ESP32-S3
  • Datanoise PicoADK
  • Datanoise PicoADK V2
  • Deneyap Kart
  • Deneyap Kart 1A
  • Deneyap Kart 1A v2
  • Deneyap Kart G
  • Deneyap Mini
  • Deneyap Mini v2
  • Diodes Delight Piunora
  • DynOSSAT-EDU-EPS
  • DynOSSAT-EDU-OBC
  • DynaLoRa_USB
  • E-Fidget
  • ELECFREAKS PICO:ED
  • ES3ink
  • ESP 12k NodeMCU
  • ESP32 Devkit V1
  • ESP32-C3-DevKitM-1
  • ESP32-C6-DevKitC-1-N8
  • ESP32-C6-DevKitM-1
  • ESP32-H2-DevKitM-1
  • ESP32-P4 Stamp XL
  • ESP32-P4-Function-EV
  • ESP32-S2-DevKitC-1-N4
  • ESP32-S2-DevKitC-1-N4R2
  • ESP32-S2-DevKitC-1-N8R2
  • ESP32-S3-Box-2.5
  • ESP32-S3-Box-Lite
  • ESP32-S3-DevKitC-1-N16
  • ESP32-S3-DevKitC-1-N32R8
  • ESP32-S3-DevKitC-1-N8
  • ESP32-S3-DevKitC-1-N8R2
  • ESP32-S3-DevKitC-1-N8R8
  • ESP32-S3-DevKitC-1-N8R8-with-HACKTABLET
  • ESP32-S3-DevKitM-1-N8
  • ESP32-S3-EYE
  • ESP32-S3-USB-OTG-N8
  • ESP8684-DevKitC-02-N4
  • Electrolama minik
  • Electronic Cats Bast Pro Mini M0
  • Electronic Cats CatWAN USBStick
  • Electronic Cats Hunter Cat NFC
  • Electronic Cats NFC Copy Cat
  • Electronut Labs Blip
  • Electronut Labs Papyr
  • EncoderPad RP2040
  • Escornabot Makech
  • Espressif ESP32 DevKitc V4 WROOM-32E
  • Espressif ESP32 DevKitc V4 WROVER
  • Espressif ESP32 TTGO T8 v1.7
  • Espressif ESP32-EYE
  • Espressif ESP32-LyraT
  • Espressif-ESP32-S3-LCD-EV-Board
  • Espressif-ESP32-S3-LCD-EV-Board_v1.5
  • Espruino Bangle.js 2
  • Espruino Pico
  • Espruino Wifi
  • Feather MIMXRT1011
  • Feather MIMXRT1062
  • FeatherS2
  • FeatherS2 Neo
  • FeatherS2 PreRelease
  • FeatherS3
  • FeatherS3 Neo
  • Fig Pi
  • Flipper Zero Wi-Fi Dev
  • Fluff M0
  • Fomu
  • Franzininho WIFI w/Wroom
  • Franzininho WIFI w/Wrover
  • Freenove ESP32-WROVER-DEV-CAM
  • Gravitech Cucumber M
  • Gravitech Cucumber MS
  • Gravitech Cucumber R
  • Gravitech Cucumber RS
  • HEIA-FR Picomo V2
  • HMI-DevKit-1.1
  • Hack Club Sprig
  • Hacked Feather M0 Express with 8Mbyte SPI flash
  • HalloWing M0 Express
  • Hardkernel Odroid Go
  • Heltec ESP32-S3-WIFI-LoRa-V3
  • HexKyS2
  • HiiBot BlueFi
  • IMXRT1010-EVK
  • IMXRT1015-EVK
  • IkigaiSense Vita nRF52840
  • IoTs2
  • J&J Studios datum-Distance
  • J&J Studios datum-IMU
  • J&J Studios datum-Light
  • J&J Studios datum-Weather
  • Kaluga 1
  • LILYGO T-DECK
  • LILYGO T-DISPLAY
  • LILYGO T-DISPLAY S3 v1.2
  • LILYGO T-Display S3 Pro
  • LILYGO T-Watch-S3
  • LILYGO TEMBED ESP32S3
  • LILYGO TTGO T-01C3
  • LILYGO TTGO T-DISPLAY v1.1
  • LILYGO TTGO T-DISPLAY v1.1 4M
  • LILYGO TTGO T-OI PLUS
  • LILYGO TTGO T8 ESP32-S2
  • LILYGO TTGO T8 ESP32-S2 w/Display
  • LOLIN S3 16MB Flash 8MB PSRAM
  • LOLIN S3 MINI 4MB Flash 2MB PSRAM
  • LOLIN S3 PRO 16MB Flash 8MB PSRAM
  • Lilygo T-watch 2020 V3
  • LoC BeR M4 base board
  • Luatos Core-ESP32C3
  • M5STACK STAMP-C3
  • M5Stack Atom Echo
  • M5Stack Atom Lite
  • M5Stack Atom Matrix
  • M5Stack Atom U
  • M5Stack AtomS3
  • M5Stack AtomS3 Lite
  • M5Stack AtomS3U
  • M5Stack Cardputer
  • M5Stack Core Basic
  • M5Stack Core Fire
  • M5Stack Core2
  • M5Stack CoreS3
  • M5Stack Dial
  • M5Stack M5Paper
  • M5Stack Stick C
  • M5Stack Stick C Plus
  • M5Stack Timer Camera X
  • MDBT50Q-DB-40
  • MDBT50Q-RX Dongle
  • MEOWBIT
  • MORPHEANS MorphESP-240
  • MagiClick S3 N4R2
  • Maker Go ESP32C3 Supermini
  • Maker Go ESP32C6 Supermini
  • Maker badge by Czech maker
  • MakerDiary nRF52840 MDK
  • MakerDiary nRF52840 MDK USB Dongle
  • MakerFabs-ESP32-S3-Parallel-TFT-With-Touch-7inch
  • Makerdiary M60 Keyboard
  • Makerdiary Pitaya Go
  • Makerdiary nRF52840 Connect Kit
  • Makerdiary nRF52840 M.2 Developer Kit
  • Maple Computing Elite-Pi
  • Melopero Shake RP2040
  • Meow Meow
  • Metro MIMXRT1011
  • MicroDev microC3
  • MicroDev microS2
  • Mini SAM M4
  • MixGo CE
  • NUCLEO F446RE
  • NUCLEO STM32F746
  • NUCLEO STM32F767
  • NUCLEO STM32H743
  • NanoS3
  • Neuron
  • NodeMcu-ESP32-C2
  • OMGS3
  • OPENMV-H7 R1
  • Oak Dev Tech BREAD2040
  • Oak Dev Tech Cast-Away RP2040
  • Oak Dev Tech PixelWing ESP32S2
  • Oak Dev Tech RPGA Feather
  • Open Hardware Summit 2020 Badge
  • Oxocard Artwork
  • Oxocard Connect
  • Oxocard Galaxy
  • Oxocard Science
  • P1AM-200
  • PCA10056 nRF52840-DK
  • PCA10059 nRF52840 Dongle
  • PCA10100 nRF52833 DK
  • PYB LR Nano V2
  • Pajenicko PicoPad
  • Particle Argon
  • Particle Boron
  • Particle Xenon
  • PewPew 10.2
  • PewPew LCD
  • PewPew M4
  • PicoPlanet
  • PillBug
  • Pimoroni Badger 2040
  • Pimoroni Badger 2040 W
  • Pimoroni Inky Frame 5.7
  • Pimoroni Inky Frame 7.3
  • Pimoroni Interstate 75
  • Pimoroni Keybow 2040
  • Pimoroni Motor 2040
  • Pimoroni PGA2040
  • Pimoroni PGA2350
  • Pimoroni Pico DV Base W
  • Pimoroni Pico LiPo (16MB)
  • Pimoroni Pico LiPo (4MB)
  • Pimoroni Pico Plus 2
  • Pimoroni Pico dv Base
  • Pimoroni PicoSystem
  • Pimoroni Plasma 2040
  • Pimoroni Plasma 2040W
  • Pimoroni Plasma 2350
  • Pimoroni Servo 2040
  • Pimoroni Tiny 2040 (2MB)
  • Pimoroni Tiny 2040 (8MB)
  • Pimoroni Tiny 2350
  • Pimoroni Tiny FX
  • ProS3
  • PyCubedv04
  • PyCubedv04-MRAM
  • PyCubedv05
  • PyCubedv05-MRAM
  • PyKey 18 Numpad
  • PyKey 44 Ergo
  • PyKey 60
  • PyKey 87 TKL
  • PyboardV1_1
  • RF.Guru RP2040
  • RGBTouch Mini
  • RP2.65-F
  • RP2040 Stamp
  • RP2350 Stamp
  • RP2350 Stamp XL
  • Raspberry Breadstick
  • Raspberry Pi 4B
  • Raspberry Pi Compute Module 4
  • Raspberry Pi Compute Module 4 IO Board
  • Raspberry Pi Pico
  • Raspberry Pi Pico 2
  • Raspberry Pi Pico W
  • Raspberry Pi Zero
  • Raspberry Pi Zero 2W
  • Raspberry Pi Zero W
  • Renode Cortex-M0+
  • Robo HAT MM1 M4
  • S2Mini
  • S2Pico
  • SAM E54 Xplained Pro
  • SAM32v26
  • SPRESENSE
  • SQFMI Watchy
  • SSCI ISP1807 Dev Board
  • SSCI ISP1807 Micro Board
  • ST STM32F746G Discovery
  • STM32F411E_DISCO
  • STM32F412G_DISCO
  • STM32F4_DISCO
  • Saola 1 w/Wroom
  • Saola 1 w/Wrover
  • Seeed Studio XIAO ESP32C3
  • Seeed XIAO nRF52840 Sense
  • Seeed Xiao ESP32-C6 4MB Flash 512KB SRAM
  • Seeed Xiao ESP32-S3 Sense
  • Seeeduino Wio Terminal
  • Seeeduino XIAO
  • Seeeduino XIAO KB
  • Seeeduino XIAO RP2040
  • Seeeduino XIAO RP2350
  • Serpente
  • SiLabs xG24 Dev Kit
  • SiLabs xG24 Explorer Kit
  • Silicognition LLC M4-Shim
  • Silicognition LLC RP2040-Shim
  • Simmel
  • SparkFun LUMIDrive
  • SparkFun MicroMod RP2040 Processor
  • SparkFun MicroMod SAMD51 Processor
  • SparkFun MicroMod nRF52840 Processor
  • SparkFun Pro Micro RP2040
  • SparkFun Pro Micro RP2350
  • SparkFun Pro nRF52840 Mini
  • SparkFun Qwiic Micro
  • SparkFun RedBoard Turbo
  • SparkFun SAMD21 Dev Breakout
  • SparkFun SAMD21 Mini Breakout
  • SparkFun STM32 MicroMod Processor
  • SparkFun Teensy MicroMod Processor
  • SparkFun Thing Plus - RP2040
  • SparkFun Thing Plus - SAMD51
  • SparkFun Thing Plus - STM32
  • Sparkfun Thing Plus MGM240P
  • Spotpear ESP32C3 LCD 1.44
  • Sprite_v2b
  • StackRduino M0 PRO
  • Sunton ESP32-2424S012
  • Sunton-ESP32-8048S050
  • Sunton-ESP32-8048S070
  • SuperMini NRF52840
  • Swan R5
  • TG-Boards' Datalore IP M4
  • TG-Watch
  • THUNDERPACK_v11
  • THUNDERPACK_v12
  • TTGO T8 ESP32-S2-WROOM
  • Targett Module Clip w/Wroom
  • Targett Module Clip w/Wrover
  • Teensy 4.0
  • Teensy 4.1
  • Teknikio Bluebird
  • The Open Book Feather
  • ThingPulse Pendrive S3
  • TinkeringTech ScoutMakes Azul
  • TinyC6
  • TinyPICO
  • TinyPICO Nano
  • TinyS2
  • TinyS3
  • TinyWATCH S3
  • Trinket M0 Haxpress
  • UARTLogger II
  • VCC-GND Studio YD RP2040
  • VCC-GND YD-ESP32-S3 (N16R8)
  • VCC-GND YD-ESP32-S3 (N8R8)
  • VIDI X V1.1
  • W5100S-EVB-Pico
  • W5500-EVB-Pico
  • WK-50 Trackball Keyboard
  • WSC-1450
  • WarmBit BluePixel nRF52840
  • Waveshare ESP32-S2-Pico
  • Waveshare ESP32-S2-Pico-LCD
  • Waveshare ESP32-S3-GEEK
  • Waveshare ESP32-S3-Pico
  • Waveshare ESP32-S3-Tiny
  • Waveshare ESP32-S3-Zero
  • Waveshare ESP32S3 LCD 1.28
  • Waveshare RP2040-GEEK
  • Waveshare RP2040-LCD-0.96
  • Waveshare RP2040-LCD-1.28
  • Waveshare RP2040-One
  • Waveshare RP2040-PiZero
  • Waveshare RP2040-Plus (16MB)
  • Waveshare RP2040-Plus (4MB)
  • Waveshare RP2040-TOUCH-LCD-1.28
  • Waveshare RP2040-Tiny
  • Waveshare RP2040-Zero
  • WeAct ESP32-C6 (4MB)
  • WeAct ESP32-C6 (8MB)
  • WeAct Studio Pico
  • WeAct Studio Pico 16MB
  • WeMos LOLIN32 Lite
  • Wemos Lolin C3 Mini
  • Wemos Lolin C3 Pico
  • Winterbloom Big Honking Button
  • Winterbloom Sol
  • WisdPi Ardu2040M
  • WisdPi Tiny RP2040
  • XinaBox CC03
  • XinaBox CS11
  • cezerio dev ESP32C6
  • iLabs Challenger 840
  • iMX RT 1020 EVK
  • iMX RT 1040 EVK
  • iMX RT 1050 EVKB
  • iMX RT 1060 EVK
  • iMX RT 1060 EVKB
  • iMX RT1011 Nano Kit
  • keithp.com snekboard
  • micro:bit v2
  • nanoESP32-S2 w/Wrover
  • nanoESP32-S2 w/Wroom
  • ndGarage[n°] Bit6: FeatherSnow-v2
  • ndGarage[n°]Bit6:FeatherSnow
  • nice!nano
  • nullbits Bit-C PRO
  • senseBox MCU
  • senseBox MCU-S2 ESP32S2
  • splitkb.com Liatris
  • stm32f411ce-blackpill
  • stm32f411ce-blackpill-with-flash
  • sunton_esp32_2432S028
  • sunton_esp32_2432S032C
  • takayoshiotake Octave RP2040
  • uChip
  • uGame10
  • uGame22

supervisor.runtime: Runtime

Runtime information, such as runtime.serial_connected (USB serial connection status). This object is the sole instance of supervisor.Runtime.

supervisor.status_bar: StatusBar

The status bar, shown on an attached display, and also sent to an attached terminal via OSC escape codes over the REPL serial connection. The status bar reports the current IP or BLE connection, what file is running, the last exception name and location, and firmware version information. This object is the sole instance of supervisor.StatusBar.

supervisor.reload() None

Reload the main Python code and run it (equivalent to hitting Ctrl-D at the REPL).

supervisor.set_next_code_file(filename: str | None, *, reload_on_success: bool = False, reload_on_error: bool = False, sticky_on_success: bool = False, sticky_on_error: bool = False, sticky_on_reload: bool = False) None

Set what file to run on the next vm run.

When not None, the given filename is inserted at the front of the usual [‘code.py’, ‘main.py’] search sequence.

The optional keyword arguments specify what happens after the specified file has run:

sticky_on_… determine whether the newly set filename and options stay in effect: If True, further runs will continue to run that file (unless it says otherwise by calling set_next_code_filename() itself). If False, the settings will only affect one run and revert to the standard code.py/main.py afterwards.

reload_on_… determine how to continue: If False, wait in the usual “Code done running. Waiting for reload. / Press any key to enter the REPL. Use CTRL-D to reload.” state. If True, reload immediately as if CTRL-D was pressed.

…_on_success take effect when the program runs to completion or calls sys.exit().

…_on_error take effect when the program exits with an exception, including the KeyboardInterrupt caused by CTRL-C.

…_on_reload take effect when the program is interrupted by files being written to the USB drive (auto-reload) or when it calls supervisor.reload().

These settings are stored in RAM, not in persistent memory, and will therefore only affect soft reloads. Powering off or resetting the device will always revert to standard settings.

When called multiple times in the same run, only the last call takes effect, replacing any settings made by previous ones. This is the main use of passing None as a filename: to reset to the standard search sequence.

supervisor.ticks_ms() int

Return the time in milliseconds since an unspecified reference point, wrapping after 2**29ms.

The value is initialized so that the first overflow occurs about 65 seconds after power-on, making it feasible to check that your program works properly around an overflow.

The wrap value was chosen so that it is always possible to add or subtract two ticks_ms values without overflow on a board without long ints (or without allocating any long integer objects, on boards with long ints).

This ticks value comes from a low-accuracy clock internal to the microcontroller, just like time.monotonic. Due to its low accuracy and the fact that it “wraps around” every few days, it is intended for working with short term events like advancing an LED animation, not for long term events like counting down the time until a holiday.

Addition, subtraction, and comparison of ticks values can be done with routines like the following:

_TICKS_PERIOD = const(1<<29)
_TICKS_MAX = const(_TICKS_PERIOD-1)
_TICKS_HALFPERIOD = const(_TICKS_PERIOD//2)

def ticks_add(ticks, delta):
    "Add a delta to a base number of ticks, performing wraparound at 2**29ms."
    return (ticks + delta) % _TICKS_PERIOD

def ticks_diff(ticks1, ticks2):
    "Compute the signed difference between two ticks values, assuming that they are within 2**28 ticks"
    diff = (ticks1 - ticks2) & _TICKS_MAX
    diff = ((diff + _TICKS_HALFPERIOD) & _TICKS_MAX) - _TICKS_HALFPERIOD
    return diff

def ticks_less(ticks1, ticks2):
    "Return true iff ticks1 is less than ticks2, assuming that they are within 2**28 ticks"
    return ticks_diff(ticks1, ticks2) < 0
supervisor.get_previous_traceback() str | None

If the last vm run ended with an exception (including the KeyboardInterrupt caused by CTRL-C), returns the traceback as a string. Otherwise, returns None.

An exception traceback is only preserved over a soft reload, a hard reset clears it.

Only code (main or boot) runs are considered, not REPL runs.

supervisor.reset_terminal(x_pixels: int, y_pixels: int) None

Reset the CircuitPython serial terminal with new dimensions.

supervisor.set_usb_identification(manufacturer: str | None = None, product: str | None = None, vid: int = -1, pid: int = -1) None

Override identification constants in the USB Device Descriptor.

If passed, manufacturer and product must be ASCII strings (or buffers) of at most 126 characters. Any omitted arguments will be left at their default values.

This method must be called in boot.py to have any effect.

Not available on boards without native USB support.

class supervisor.RunReason

The reason that CircuitPython started running.

STARTUP: object

CircuitPython started the microcontroller started up. See microcontroller.Processor.reset_reason for more detail on why the microcontroller was started.

AUTO_RELOAD: object

CircuitPython restarted due to an external write to the filesystem.

SUPERVISOR_RELOAD: object

CircuitPython restarted due to a call to supervisor.reload().

REPL_RELOAD: object

CircuitPython started due to the user typing CTRL-D in the REPL.

class supervisor.Runtime

Current status of runtime objects.

Usage:

import supervisor
if supervisor.runtime.serial_connected:
    print("Hello World!")

You cannot create an instance of supervisor.Runtime. Use supervisor.runtime to access the sole instance available.

usb_connected: bool

Returns the USB enumeration status (read-only).

serial_connected: bool

Returns the USB serial communication status (read-only).

serial_bytes_available: int

Returns the number of bytes are available to read on the console serial input. Multiple console serial inputs may be in use at once, including USB, web workflow, BLE workflow, and/or UART.

Allows for polling to see whether to call the built-in input() or wait. (read-only)

Limitations: On STM, UART (not USB) console input can only determine that at least one character is available, and so if only the UART console is in use, only 1 or 0 will be returned.

Changed in version 9.1.0: Previously returned only True or False. Since 0 acts as False, if supervisor.runtime.serial_byes_available: will still work.

run_reason: RunReason

Why CircuitPython started running this particular time (read-only).

safe_mode_reason: SafeModeReason

Why CircuitPython went into safe mode this particular time (read-only).

Limitations: Raises NotImplementedError on builds that do not implement safemode.py.

autoreload: bool

Whether CircuitPython may autoreload based on workflow writes to the filesystem.

ble_workflow: bool

Enable/Disable ble workflow until a reset. This prevents BLE advertising outside of the VM and the services used for it.

rgb_status_brightness: int

Set brightness of status RGB LED from 0-255. This will take effect after the current code finishes and the status LED is used to show the finish state.

class supervisor.SafeModeReason

The reason that CircuitPython went into safe mode.

Limitations: Class not available on builds that do not implement safemode.py.

NONE: object

CircuitPython is not in safe mode.

BROWNOUT: object

The microcontroller voltage dropped too low.

FLASH_WRITE_FAIL: object

Could not write to flash memory.

GC_ALLOC_OUTSIDE_VM: object

CircuitPython tried to allocate storage when its virtual machine was not running.

HARD_FAULT: object

The microcontroller detected a fault, such as an out-of-bounds memory write.

INTERRUPT_ERROR: object

Internal error related to interrupts.

NLR_JUMP_FAIL: object

An error occurred during exception handling, possibly due to memory corruption.

NO_CIRCUITPY: object

The CIRCUITPY drive was not available.

NO_HEAP: object

Heap storage was not present.

PROGRAMMATIC: object

The program entered safe mode using the supervisor module.

SDK_FATAL_ERROR: object

Third party firmware reported a fatal error.

STACK_OVERFLOW: object

The CircuitPython heap was corrupted because the stack was too small.

USB_BOOT_DEVICE_NOT_INTERFACE_ZERO: object

The USB HID boot device was not set up to be the first device, on interface #0.

USB_TOO_MANY_ENDPOINTS: object

USB devices need more endpoints than are available.

USB_TOO_MANY_INTERFACE_NAMES: object

USB devices specify too many interface names.

USER: object

The user pressed one or more buttons to enter safe mode. This safe mode does not cause safemode.py to be run, since its purpose is to prevent all user code from running. This allows errors in safemode.py to be corrected easily.

WATCHDOG: object

An internal watchdog timer expired.

class supervisor.StatusBar

Current status of runtime objects.

Usage:

import supervisor

supervisor.status_bar.console = False

You cannot create an instance of supervisor.StatusBar. Use supervisor.status_bar to access the sole instance available.

console: bool

Whether status bar information is sent over the console (REPL) serial connection, using OSC terminal escape codes that change the terminal’s title. Default is True. If set to False, status bar will be cleared and then disabled. May be set in boot.py or later. Persists across soft restarts.

display: bool

Whether status bar information is displayed on the top line of the display. Default is True. If set to False, status bar will be cleared and then disabled. May be set in boot.py or later. Persists across soft restarts. Not available if terminalio is not available.