Strato

Strato Pi is an expansion board developed by Sfera Labs for the Raspberry Pi computer.

Strato Pi

Strato Pi implements a number of hardware features to expand the Pi and allows its use in professional applications:

• 9-28 Vdc extended-range power supply
• integrated UPS with external NiCd rechargeable battery
• real-time clock with dedicated back-up battery
• opto-isolated RS-232, RS-485, CAN bus ports
• configurable hardware watchdog
• buzzer for audible feedback.

HSYCO Configuration

Add a STRATO I/O Server in the I/O Servers section of the Settings and set its parameters.

Note that the Strato I/O Server doesn't count in the I/O servers license total, so you don't need an extra I/O Server license to use Strato with HSYCO.

On Strato Pi Base, UPS, CAN, CM and CM Duo, the STRATO I/O Server requires the Strato Pi Kernel Module to be fully functional. Without the kernel module, only a subset of the features are available for backward compatibility.

Strato Pi Fan is also supported if the Strato Pi Fan Kernel Module is installed.

High Availability

• Shutdown when inactive: defaults to false.

Options

ID	Default	Values	Description
dualsdsync	false	true	enables the files synchronisation process that copies all HSYCO files and some operating system configuration files to the alternate SD card (SD1). Synchronisation occurs automatically once a minute. SD1 is enabled and its root file system mounted to /mnt/alt
		false	disables the files synchronisation process
		manual	doesn't change the watchdog configuration parameters
watchdog	always (false on Strato Pi Mini)	always	enables the hardware watchdog and automatically generates the heartbeat signal (when the HSYCO main control loop is running normally, approximately every 10 seconds). The watchdog timeout is set to 60 seconds while HSYCO is running, or to 1 hour when HSYCO is manually stopped (sysctl stop hsyco) and when it is starting. If dualsdsync is set to true or manual, the watchdog is configured to boot from the alternate SD card if there is no heartbeat after the first reboot
		true	enables the hardware watchdog only while HSYCO is running, and automatically generates the heartbeat signal (when the HSYCO main control loop is running normally, approximately every 10 seconds). The watchdog timeout is temporarily set to 1 hour when HSYCO is starting. If dualsdsync is set to true or manual, the watchdog is configured to boot from the alternate SD card
		false	disables the hardware watchdog
		ignore	doesn't change the watchdog configuration parameters
shutdown_minutes	0	0	no automatic shutdown after power failure
		int > 0	the driver will command the operating system shutdown and hardware power off after N minutes of back-up battery operations during a power failure. The Strato board will automatically power-up the Pi when power is restored (use this option only with the Strato UPS board)
quiet	false	true	enables audible alarms on power failure
		false	disables audible alarms on power failure
version	base (automatically detected when the Strato Pi Kernel Module is installed)	base	Strato Pi Base and UPS boards
		mini	Strato Pi Mini board
		can	Strato Pi CAN
		cm	Strato Pi CM
		cmduo	Strato Pi CM Duo

Datapoints

The Strato I/O Server implements all data points provided by the underlying Strato Pi kernel module. Refer to the documentation available at Strato Pi Kernel Module.

Each readable file name exposed by the kernel module under the /sys/class/ionopimax/ sub-directories appears as a data point with id <subdir>.<file>. For example, as the buzzer's status file is /sys/class/stratopi/buzzer/status, the corresponding data point is "buzzer.status".

Command files that are marked as write only in the documentation (W), are not shown as visible data points in HSYCO, but can be used in the IO events action or ioSet() methods to send a command.

For example, if "strato" is the id assigned to the Strato I/O Server, then:

TIME : IO strato.buzzer.beep = 1000

will make the buzzer beep for 1 second (1000 ms).

Note that "strato.buzzer.beep" is not visible in the Status Browser and doesn't generate events, because it is write only, and only the "strato.buzzer.status" data point will be visible, with a value of 0 if the buzzer is not active, or 1 if active.

Additional datapoints

ID	Value	R/W	Description
backlight.brightness	<brightness>	R	the current backlight brightness of HSYCO Pi Touch Display
		W	set brightness of HSYCO Pi Touch Display to a value between 0 (off) and 255 (max)
battery (base/ups only)	0	R	power supply is available
	1	R	power supply failure, running on UPS battery
beep (base/ups/can/mini only)	0	R	buzzer is off
	1	R	buzzer is on
	off	W	turn buzzer off
	on	W	turn buzzer on (continuous tone)
	<duration>	W	turn buzzer on for <duration> seconds (decimals allowed)
	<duration>;<pause>	W	turn buzzer on for <duration> seconds, then pause for <pause> seconds (decimals allowed)
cpu.temperature	<temperature>	R	the current CPU core temperature, in Celsius degrees
dualsdsync (cm duo only)	0	R	manual SD synchronisation completed
	1	R	manual SD synchronisation pending or in progress
		W	initiate SD synchronisation (only available when the dualsdsync option is set to "manual"
dualsdsync.status (cm duo only)	N	R	status of the last SD synchronisation run: >=0: number of files synchronised -1: error while updating files (see logs) -2: alternate SD card not available or file system error
dualsdsync.time (cm duo only)	<timestamp>	R	positive integer number representing the time in seconds since 00:00:00 UTC on 1 January 1970 of when the last synchronization run ended (with or without errors)
fan.temperature	<temperature>	R	temperature measured by the Strato Pi Fan on-board sensor, in Celsius degrees
fan.temperature.off	<temperature>	R	the current fan turn-off temperature threshold, in Celsius degrees
		W	set fan turn-off temperature threshold, in Celsius degrees
fan.temperature.on	<temperature>	R	the current fan turn-on temperature threshold, in Celsius degrees
		W	set fan turn-on temperature threshold, in Celsius degrees
heartbeat (base/ups/can/cm only)	0	R	heartbeat line is off
		W	set heartbeat line to off
	1	R	heartbeat line is on
		W	set heartbeat line to on
led (cm only)	0	R	led is off
	1	R	led is on
	off	W	turn led off
	on	W	turn led on
	<duration>	W	turn led on for <duration> seconds (decimals allowed)
	<duration>;<pause>	W	turn led on for <duration> seconds, then pause for <pause> seconds (decimals allowed)
shutdown (base/ups/can/cm only)	0	R	shutdown line is off
	1	R	shutdown line is on
		W	Quit HSYCO, halt the operating system, and perform a power cycle to reboot. Once the shutdown process is initiated, the power cycle procedure can't be reset. On Strato Pi CM, a hardware reset of the Compute Module is performed, instead of a full power down cycle
timeout (base/ups/can/cm only)	0	R	hardware watchdog timeout line is off (not expired)
	1	R	hardware watchdog timeout line is on (expired). When the watchdog expires, Strato will set this line to on, then wait approximately 60 seconds and execute a power off-on cycle. On Strato Pi CM, a hardware reset of the Compute Module is performed, instead of a full power down cycle
timeout.time (base/ups/cm only)	<seconds>	R	the watchdog current timeout time in seconds
		W	set the watchdog timeout time in seconds (1 - 99999). Factory default: 60
watchdog (base/ups/can/cm only)	0	R	hardware watchdog is disabled
		W	disables the hardware watchdog
	1	R	hardware watchdog is enabled
		W	enables the hardware watchdog. When enabled, Strato should see an off-on transition on the hearbeat line at least every 60 seconds, otherwise a power cycle will be initiated, setting the timeout line on, then waiting 60 seconds, removing power to the Pi for 5 seconds, and finally restoring power. On Strato Pi CM, a hardware reset of the Compute Module is performed, while the power is not removed

Release Notes

3.8.0

• dual µSD card support
• improved watchdog and UPS support (excluding Strato Pi CM Mini)
• supports the Strato Pi Kernel Module (excluding Strato Pi CM Mini)
• supports the Strato Pi Fan Kernel Module

3.7.0

• added support for Strato Pi CAN and Strato Pi CM Duo
• new cpu.temperature data point

3.6.0

• added support for Strato Pi Mini and Strato Pi CM
• new backlight.brightness data point to set the display backlight brightness of HSYCO Pi Touch Display

3.5.0

• initial release

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Strato is a registered trademark of Sfera Labs Srl