Please note the corresponding compatibility between hardware and software revision. The non-given functionality, as well as the faulty parameters, may result from corresponding incompatibility.
Please use the 1.X firmware and software updates for the hardware revision 1.X. This also applies to the current hardware revision 2.X and the associated software updates.
First, check the entire I2C bus using the sudo i2cdetect -a -y 1 command; the I2C address of the S.USV may have been moved to another address (for example, 0x01, 0x00).
In this case, please manually transfer the address to the susv.cfg located in /opt/susvd and execute a restart of the daemon process
If the I2C communication has been activated again, you can reset the I2C address back to the original 0x0f.
The problem indicates a faulty configuration of the S.USV daemon process.
Please check first if it works correctly - Change to the directory /opt/susvd and execute the following command sudo ./susvd -status
Please note that the supply of various peripherals and activated charging circuit via the microUSB input of the single-board computer can lead to voltage drops on the GPIO power pins. The S.USV switches automatically to the secondary mode with an input voltage smaller then 4.75V and with the daemon process activated in the shutdown.
Please proceed as follows to check the problem:
• Shutdown the system
• Removing the S.USV solutions module
• Reboot the system and stop the S.USV Daemon process
• Restart the system with S.USV solutions module
• You can now measure the input voltage directly at the GPIO pins
In most cases the problem could be solved by a more powerful power supply with an output voltage of 5.25V. For systems with higher power consumption we recommend to realize the power supply via the external input of the S.USV, which can supply up to 3.5A.
In the secondary mode (battery operation) of the S.USV, current values are continuously determined and further processed in corresponding firmware programs. This allows the modules to recognize a return of the primary power supply, resulting in a significant reduction in power consumption through the secondary input. The intelligent software detects and responds to the performance of the primary power source and responds accordingly.
If the S.USV module does not switch back to primary mode after the power source has returned, we recommend testing the scenario with more powerful power supplies.
For the function of the S1 Shutdown/Reboot button, a correct working of the S.USV Daemon process is necessary, which processes the corresponding signals.
Please check first if it works correctly - Change to the directory /opt/susvd and execute the following command from sudo ./susvd -status