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I can't seem to find any good forum to address issues with the CarPiHat Pro powering aPi5. Every boot up I get Pi warning stating "The power supply is not capable of providing 5 amps....". I have a Pi5 with 4gig ram, a Seeed underhat for the boot PCIe memory, a geeek heat sink/fan and the Car Pi Hat Pro. I have disabled Pi5 based BT and WiFi and am using separate modules on a powered hub to reduce on Pi drain and have better reception outside the double DIN cage it will all be installed in.

Summary of parts: Raspberry Pi 5 - 4GB, Raspberry Pi SSD - 256GB, Seeed PCIe 3.0 Dual M.2 HAT for Raspberry Pi 5, CarPiHAT PRO 5 - Car Interface + DAC for Raspberry Pi 5.

Any ideas?

It is probably related to https://www.raspberrypi.com/documentati ... berry-pi-5

It looks like the official Raspberry Pi 27W power supply has some mechanisms that allow the Raspberry Pi 5 to detect it.

Setting usb_max_current_enable=1 in /boot/firmware/config.txt should allow you to get rid of this warning.

Found a real fix for this on youtube. Solution requires writing PSU_MAX_CURRENT=5000 to the Pis eeprom. See https://www.youtube.com/watch?v=lEZccWuOXuo. About 6:50 in.

Before doing this it might be wise to check your applied voltage by "vcgencmd pmic_read_adc EXT5V-V"

Neither of these are my idea. Thanx Interweb thingy.

Thankyou @gwynethh ; a very useful bit of information. I searched the command and came up with more options:

From https://forums.raspberrypi.com/viewtopi ... 9#p2154772

rpdom@raspberrypi:~ $ vcgencmd pmic_read_adc
3V7_WL_SW_A current(0)=0.00000000A
3V3_SYS_A current(1)=0.07124290A
1V8_SYS_A current(2)=0.15810070A
DDR_VDD2_A current(3)=0.02147046A
DDR_VDDQ_A current(4)=0.00000000A
1V1_SYS_A current(5)=0.23422320A
0V8_SW_A current(6)=0.33181620A
VDD_CORE_A current(7)=0.75012000A
3V3_DAC_A current(17)=0.00000000A
3V3_ADC_A current(18)=0.00000000A
0V8_AON_A current(16)=0.00488400A
HDMI_A current(22)=0.01184370A
3V7_WL_SW_V volt(8)=3.74153500V
3V3_SYS_V volt(9)=3.31931300V
1V8_SYS_V volt(10)=1.80317300V
DDR_VDD2_V volt(11)=1.11391800V
DDR_VDDQ_V volt(12)=0.60439500V
1V1_SYS_V volt(13)=1.10695900V
0V8_SW_V volt(14)=0.80439480V
VDD_CORE_V volt(15)=0.72124470V
3V3_DAC_V volt(20)=3.31043600V
3V3_ADC_V volt(21)=3.31318300V
0V8_AON_V volt(19)=0.79912020V
HDMI_V volt(23)=5.14828000V
EXT5V_V volt(24)=5.14292000V
BATT_V volt(25)=2.78119400V