6/11/2023 0 Comments Raspberry pi battery monitor![]() ![]() It is strongly recommended that Raspberry Pi performs a self-shutdown then the battery voltage drops to 3.0V. A software command is available to the user to also monitor the battery voltage. To prevent permanent damage to the battery due to over-discharging, the processor will cut off the power to Raspberry Pi when the battery drops below 2.8V. When running on battery power, the watchdog processor monitors the battery voltage. The 18650 Li-Ion battery (not provided) can keep the Raspberry Pi running for hours, assuring continuous operation during power outages. In order to operate, the watchdog must provide the power to Raspberry Pi. For your convenience, the board is equipped with three power connectors: a micro-USB connector similar with the one found on the Raspberry Pi boards, a USB Type-C, and a 2.1mm barrel connector found on many standard 5V power supplies. The Raspberry Pi Watchdog needs 5V to operate. This feature leaves the remaining 24 GPIOs available for the user. The card share the I2C bus using only two of the Raspberry Pi’s GPIO pins to manage all eight cards. The Raspberry Pi Watchdog is compatible with all Raspberry version B+, 2, 3, 4 and Zero. The number of resets is stored in flash and can be accessed or cleared from the command line. The timer period after power up and the active timer period can be set from the command line. The command can be sent either on the I2C port, or by toggling GPIO11 ( Pin 23 on the GPIO connector). Raspberry Pi needs to issue a reset command before the timer on the watchdog expires. Once installed, if it does not receive a reset from Raspberry Pi within 2 minutes, it cuts the power and restores it after 10 seconds. ![]() ![]() The watchdog has a default timeout of 120 seconds. It power-cycle the Raspberry Pi in case of software lock-up, resetting not only the Pi but also any peripheral attached to it, and it prevents SD-Card failure in case of power loss, by allowing the Raspberry Pi to shut down itself safely. The Raspberry Pi Watchdog provides the safety required by mission critical projects, implementing two major functions. The watchdog measures only 87mm * 28mm but packs a lot of functions. If you use your Raspberry Pi for any mission critical project, you need the Super-Watchdog with battery backup. Uses only I2C port (address 0x30) leaving all GPIO pins availableÄESCRIPTION Raspberry Pi Watchdog and Battery Backup for all Raspberry Pi Boards.Provide up to 3A/5V power to Raspberry Pi from Li-Ion Battery.Triple power supply jacks: micro USB, USB-C and pluggable 3.5mm connector.On board battery charger, step-up converter and intelligent power monitor.UPS runs for hours on Li-Ion 18650 battery.Prevent SD Card damage during power outages.A must for all RPI mission critical installation.Super Watchdog HAT with UPS Battery Backup for Raspberry Pi. ![]()
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