i do stress test to the stereopi in outdoor environment where i put inside a casing and under the sun
the stereopi is powered up by connecting a 12V to a buck converter and step down the voltage to 5V.
the current draw during running pi camera code is 0.39~0.46A
at certain time ( usually between 1 pm to 4pm GMT+8) the pi hit a temperature of 73.5~75 C and suddenly the Ethernet/USB disconnect.
example of dmesg output :
temperature at around this time :[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] ERROR::dwc_otg_hcd_urb_enqueue:501: Not connected
[Wed Sep 9 15:54:40 2020] usb 1-1: USB disconnect, device number 17
[Wed Sep 9 15:54:40 2020] usb 1-1.1: USB disconnect, device number 18
[Wed Sep 9 15:54:40 2020] smsc95xx 1-1.1:1.0 eth0: unregister 'smsc95xx' usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet
[Wed Sep 9 15:54:40 2020] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[Wed Sep 9 15:54:55 2020] Indeed it is in host mode hprt0 = 00021501
[Wed Sep 9 15:54:55 2020] usb 1-1: new high-speed USB device number 19 using dwc_otg
[Wed Sep 9 15:54:55 2020] Indeed it is in host mode hprt0 = 00001101
[Wed Sep 9 15:54:55 2020] usb 1-1: New USB device found, idVendor=0424, idProduct=9514, bcdDevice= 2.00
[Wed Sep 9 15:54:55 2020] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[Wed Sep 9 15:54:55 2020] hub 1-1:1.0: USB hub found
[Wed Sep 9 15:54:55 2020] hub 1-1:1.0: 5 ports detected
[Wed Sep 9 15:54:56 2020] usb 1-1.1: new high-speed USB device number 20 using dwc_otg
[Wed Sep 9 15:54:56 2020] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00, bcdDevice= 2.00
[Wed Sep 9 15:54:56 2020] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[Wed Sep 9 15:54:56 2020] smsc95xx v1.0.6
[Wed Sep 9 15:54:56 2020] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:37:bf:28
[Wed Sep 9 15:54:56 2020] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[Wed Sep 9 15:54:58 2020] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[Wed Sep 9 15:54:58 2020] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
after that cannot ssh at all or receive the messages from the pi09/09/2020 15:52:43 CPU usage 35.3% Memory Total 874MB Used 178MB Free 645MB Temp 74.1'C
09/09/2020 15:53:40 CPU usage 38.5% Memory Total 874MB Used 161MB Free 663MB Temp 73.6'C
09/09/2020 15:54:09 CPU usage 36.9% Memory Total 874MB Used 159MB Free 664MB Temp 74.1'C
09/09/2020 15:54:10 CPU usage 39.7% Memory Total 874MB Used 165MB Free 659MB Temp 74.1'C
09/09/2020 15:54:11 CPU usage 38.4% Memory Total 874MB Used 159MB Free 664MB Temp 74.7'C
09/09/2020 15:54:12 CPU usage 38.0% Memory Total 874MB Used 166MB Free 657MB Temp 74.7'C
09/09/2020 15:54:13 CPU usage 32.4% Memory Total 874MB Used 163MB Free 660MB Temp 74.7'C
09/09/2020 15:54:14 CPU usage 27.1% Memory Total 874MB Used 161MB Free 662MB Temp 74.7'C
09/09/2020 15:54:15 CPU usage 35.8% Memory Total 874MB Used 167MB Free 656MB Temp 74.7'C
09/09/2020 15:54:40 CPU usage 27.7% Memory Total 874MB Used 161MB Free 662MB Temp 74.1'C
09/09/2020 15:56:33 CPU usage 27.5% Memory Total 874MB Used 203MB Free 620MB Temp 74.1'C
the current draw at this point is 0.32
attached files is today testing , this test had been done multiple days and same error comes out dmesgPi.txt is the dmesgs for the whole test and tmpePi.txt is temperature recording