Hi everyone,
I need some help with my Sunfounder UPS which use USBC input to charge the batteries. I must connect this UPS to a permanent power supply of 5V 6A with only two terminals without USBC connector, to do that, can I use a normal USBC cable and connect one terminal to the UPS and strip the other terminal and connect the VBUS directly to the 5V? Thanks for your help.
I’m very sorry, didn’t quite understand what you meant.
I hope you can give us more details on how you use pipower to work.
Or you can provide the workflow of pipower and your equipment, how is a workflow.
You can simply draw a flow chart for us, so that we can analyze the problem.
I have the same annoying problem when my ups is receiving external power. I get a continuous popup on the screen I’m working on. I love the ups and it works perfectly when disconnected from external 5V charging and passthrough charger. What is the solution. More amps available, a slightly higher input voltage or is the pull down on the ultimate passed through voltage just going to always be lower than my pi 4B wants? Or are there any pins on the ups board that I can connect a usbC cable to get 5v from the battery side of the ups instead of the passthrough lower voltage. This behavior was present right out of the box in April when I purchased the ups.
To better assist you with your setup, could you please provide us with the following details:
UPS Version: Which version of our UPS are you currently using? A photo would be very helpful for us to identify it.
Power Supply Specifications: Could you let us know the specifications of your power supply unit?
USB Devices: Are you connecting multiple USB devices to your Raspberry Pi 4? If the load is too high or too many devices are connected, it may trigger a low voltage warning.
Once we have this information, we’ll be able to diagnose the issue more accurately and provide you with the best solution.
We recommend that you replace the original USB Type-C power cable with a higher quality one to see if that resolves the issue.
When you receive a low voltage warning, you can use a multimeter to measure the voltage at the GPIO 5V and GND pins to check the readings.
If you do not connect an external power source and use the PiPower to supply power to the Raspberry Pi from the battery, does the low voltage warning still occur?
You are currently using a third-party 5.1V 3.5A power supply, and we’re unsure of its actual performance.
If you have the official power supply for the Pi 4, it would be good to test it to see if the same issue occurs.
Hello,
I just setup my PiPower today and I’m having the exact same issue with the exact same setup. I have the same power supply as IBH and I get the exact same warning. If I remove the PiPower V2 from the circuit it works perfectly fine without the Low Voltage warning. I have a 7" touch screen monitor, a GPS, and a wireless mouse/keyboard dongle all plugged into the Raspberry Pi 4B. I have tried a cable from a computer USB-A to USB-C and I get the same lightening bolt and low voltage warning. The battery on the PiPower is showing all 4 charge lights on. Has this issue been resolved for the OP? Thanks. Matt
Due to the input voltage passing through multiple interfaces to the Raspberry Pi, there will be a certain voltage drop at each interface. This can cause the Raspberry Pi to detect a low voltage situation when using an external power source under high current conditions. Generally, there’s no need to worry; as long as the voltage is below 4.65V, it will automatically switch to battery power. The voltage during battery power doesn’t have as many drops, ensuring that it is sufficient for the Raspberry Pi and preventing low voltage issues.