wittypi5 0.1.0.post1

Python driver for Witty Pi 5 HAT+ on Raspberry Pi 5

Witty Pi 5 Python Driver

Python module for reading and writing Witty Pi 5 HAT+ registers via I2C on Raspberry Pi 5.

Setup

1. Enable I2C on your Raspberry Pi (raspi-config → Interface Options → I2C).

2. Install from PyPI:

   uv pip install wittypi5
   

   Or with pip:

   pip install wittypi5
   

Usage

from wittypi5 import ActionReason, Register, WittyPi5

# Context manager (recommended)
with WittyPi5() as wp5:
    # Status readings
    print(f"Firmware: {wp5.firmware_version}")
    print(f"V_USB: {wp5.v_usb} V, V_IN: {wp5.v_in} V")
    print(f"Last startup: {wp5.action_reason_startup.name}")
    print(f"Last shutdown: {wp5.action_reason_shutdown.name}")

    # RTC and temperature
    print(f"RTC: {wp5.datetime}")
    print(f"Temperature: {wp5.temp_c}°C ({wp5.temp_f}°F)")

    # Sync RTC with system time
    wp5.sync_rtc_with_local()

    # Raw register access
    state = wp5.read_register(Register.RASPBERRY_PI_STATE)

    # Config (read/write)
    wp5.config_led_on_time = 100  # LED on for 100 ms

Methods

Method	Description
open()	Open I2C connection
close()	Close I2C connection
read_register(reg)	Read byte from register
write_register(reg, value)	Write byte to register
sync_rtc_with_local()	Set RTC from datetime.now()

Custom I2C Bus or Address

wp5 = WittyPi5(i2c_bus=1, i2c_address=0x51)
wp5.open()
# ...
wp5.close()

Properties

Status

Property	Type	Access	Description
firmware_id	int	Read only	Firmware ID
firmware_version	str	Read only	Firmware version (e.g. "1.02")
missed_heartbeats	int	Read only	Number of missed heartbeats
action_reason_startup	ActionReason	Read only	Latest startup action reason
action_reason_shutdown	ActionReason	Read only	Latest shutdown action reason
v_usb	float	Read only	V_USB voltage (V)
v_in	float	Read only	V_IN voltage (V)
v_out	float	Read only	V_OUT voltage (V)
i_out	float	Read only	I_OUT current (A)

RTC and Temperature

Property	Type	Access	Description
hour	int	Read only	RTC hour (0-23)
minute	int	Read only	RTC minute (0-59)
second	int	Read only	RTC second (0-59)
day	int	Read only	RTC day of month (1-31)
weekday	int	Read only	RTC day of week (0=Mon, 6=Sun)
month	int	Read only	RTC month (1-12)
year	int	Read only	RTC year (full year)
date	datetime.date	Read only	RTC date
time	datetime.time	Read only	RTC time
datetime	datetime.datetime	Read only	RTC date and time
temp_c	float	Read only	Temperature (°C)
temp_f	float	Read only	Temperature (°F)

Config

Property	Type	Access	Description
config_i2c_address	int	R/W	I2C slave address
config_power_on_delay	int	R/W	Delay before turning on Pi in seconds (0=immediate, 255=stay off)
config_shutdown_delay	int	R/W	Delay between Pi shutdown and power cut (seconds)
config_pulse_interval	int	R/W	Pulse interval for LED and dummy load (seconds)
config_led_on_time	int	R/W	White LED on time in ms (0=no blink)
config_dummy_load_time	int	R/W	Dummy load time in ms (0=off)
config_low_voltage_threshold	int	R/W	Low voltage threshold (×10 mV), 0=disabled
config_recovery_voltage_threshold	int	R/W	Recovery voltage threshold (×10 mV), 0=disabled
config_power_source_priority	int	R/W	0=VUSB first, 1=VIN first
config_v_usb_adjustment	int	R/W	Adjustment for VUSB (×100), -128 to 127
config_v_in_adjustment	int	R/W	Adjustment for VIN (×100), -128 to 127
config_v_out_adjustment	int	R/W	Adjustment for VOUT (×100), -128 to 127
config_i_out_adjustment	int	R/W	Adjustment for IOUT (×1000), -128 to 127
config_watchdog_heartbeat_limit	int	R/W	Missed heartbeats before power cycle (0=disabled)
config_log_to_file_enabled	bool	R/W	Whether to write log to file
config_startup_alarm_second	int	R/W	Startup alarm second (0-59)
config_startup_alarm_minute	int	R/W	Startup alarm minute (0-59)
config_startup_alarm_hour	int	R/W	Startup alarm hour (0-23)
config_startup_alarm_day	int	R/W	Startup alarm day (day-of-week 1-7 or date 1-31)
config_shutdown_alarm_second	int	R/W	Shutdown alarm second (0-59)
config_shutdown_alarm_minute	int	R/W	Shutdown alarm minute (0-59)
config_shutdown_alarm_hour	int	R/W	Shutdown alarm hour (0-23)
config_shutdown_alarm_day	int	R/W	Shutdown alarm day (day-of-week 1-7 or date 1-31)
config_factory_reset_enabled	bool	R/W	Allow BOOTSEL + button for factory reset
config_below_temp_action	int	R/W	Action for below temp: 0=nothing, 1=startup, 2=shutdown
config_below_temp_threshold	int	R/W	Below temperature threshold (°C)
config_over_temp_action	int	R/W	Action for over temp: 0=nothing, 1=startup, 2=shutdown
config_over_temp_threshold	int	R/W	Over temperature threshold (°C)
config_dst_mode_and_offset	int	R/W	DST mode (bit7) and offset in minutes (bits 6-0), 0=disable
config_dst_applied	int	R/W	Whether DST has been applied
config_system_clock_mhz	int	R/W	System clock for RP2350 (MHz)