EG915N-EU (on EVB) ESP32S3 esp-modem (USB connection) USB_BOOT only enumeration

Hi All,
I’m developing a board using EG915N-EU module connecting to ESP32-S3 modem port.

When I connect the EVB to windows the USB ports enumerate correctly (Vid: 0x2C7C Pid 0x6002), but when I connect to my hardware (ESP32S3-devkit) I get the USB_BOOT port only (Vid: 0x2ECC Pid 0x3004).
I have no GPIO lines connected between the devkit and EVB (I manually do the PWRKEY). Using external 5A PSU so it’s not a power thing.

My question is how can I get past the USB_BOOT port enumeration - tyo the actual modem ports, without having GPIO connections to the EVB please?

Thanks very much in advance for your help.

This is the enumeration of the USB_BOOT port currently:
debug_log:
(15800) modem_board: Waiting for modem initialize ready
I (20800) USB_HCDC: iot_usbh_cdc, version: 0.1.3
I (20800) IOT_USBH: iot_usbh, version: 0.1.2
I (20830) IOT_USBH: USB Port=1 init succeed, fifo strategy=0
I (20830) USB_HCDC: CDC task start
I (20830) IOT_USBH: usb port start succeed
I (20834) USB_HCDC: usbh cdc driver install succeed
I (20839) USB_HCDC: Waiting CDC Device Connection
I (20845) IOT_USBH: USB Processing Start
I (20849) IOT_USBH: Waiting USB Connection
I (20854) IOT_USBH: Port power: ON Succeed
I (50937) IOT_USBH: line 131 PORT_EVENT_CONNECTION
I (51037) IOT_USBH: Resetting Port
I (51097) IOT_USBH: Port reset succeed
I (51097) IOT_USBH: Getting Port Speed
I (51097) IOT_USBH: USB Speed: full-speed
I (51100) IOT_USBH: Pipe init succeed, addr: 00
I (51105) IOT_USBH: Set Device Addr = 1
I (51109) IOT_USBH: Set Device Addr Done
I (51114) IOT_USBH: get device desc
I (51119) IOT_USBH: get device desc, actual_num_bytes:26
*** Device descriptor ***
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0x2
bDeviceSubClass 0x2
bDeviceProtocol 0x0
bMaxPacketSize0 64
idVendor 0x2ecc
idProduct 0x3004
bcdDevice 0.00
iManufacturer 1
iProduct 2
iSerialNumber 3
bNumConfigurations 1
I (51147) IOT_USBH: get short config desc
I (51153) IOT_USBH: get config desc, actual_num_bytes:16
I (51158) IOT_USBH: get full config desc
I (51164) IOT_USBH: get full config desc, actual_num_bytes:75
*** Configuration descriptor ***
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 4
bmAttributes 0xc0
bMaxPower 0mA
*** Interface descriptor ***
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 0x2
bInterfaceSubClass 0x2
bInterfaceProtocol 0x0
iInterface 5
*** Endpoint descriptor ***
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 0x3 INT
wMaxPacketSize 10
bInterval 1
*** Interface descriptor ***
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 0xa
bInterfaceSubClass 0x0
bInterfaceProtocol 0x0
iInterface 6
*** Endpoint descriptor ***
bLength 7
bDescriptorType 5
bEndpointAddress 0x2 EP 2 OUT
bmAttributes 0x2 BULK
wMaxPacketSize 64
bInterval 0
*** Endpoint descriptor ***
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 0x2 BULK
wMaxPacketSize 64
bInterval 0
I (51262) IOT_USBH: Set Device Configuration = 1
I (51268) IOT_USBH: Set Device Configuration Done
I (51273) IOT_USBH: Pipe init succeed, addr: 86
I (51278) IOT_USBH: Pipe init succeed, addr: 04
I (51283) USB_HCDC: CDC Device Connected
I (51288) esp-modem: --------- Modem PreDefined Info ------------------
I (51295) esp-modem: Model: BG96MA
I (51299) esp-modem: Modem itf: IN Addr:0x86, OUT Addr:0x04
I (51305) esp-modem: ----------------------------------------------------
I (51313) gpio: GPIO[12]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (51322) gpio: GPIO[13]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (51332) USB_HCDC: rx0 flush -0 = 0
W (51336) USB_HCDC: Itf:0 ep: 0x86 PIPE_EVENT_ERROR_XFER
W (51342) USB_HCDC: Itf:0 ep: 0x04 PIPE_EVENT_ERROR_XFER
I (51348) 4g_main: Modem Board Event: USB connected
I (51348) modem_board: DTE reconnect, reconnecting …

W (51514) IOT_USBH: line 135 PORT_EVENT_DISCONNECTION
I (51514) IOT_USBH: hcd port state = 7
I (51515) USB_HCDC: CDC task Reset
W (51517) IOT_USBH: pipe=0x3fcb9064 clear failed
W (51522) USB_HCDC: in pipe flush failed
I (51527) IOT_USBH: iot_usbh_pipe_deinit: pipe state = 1
I (51533) IOT_USBH: Pipe deinit succeed, addr: 86
W (51538) IOT_USBH: pipe=0x3fcb9118 clear failed
W (51544) USB_HCDC: out pipe flush failed
I (51548) IOT_USBH: iot_usbh_pipe_deinit: pipe state = 1
I (51554) IOT_USBH: Pipe deinit succeed, addr: 04
I (51560) USB_HCDC: rx0 flush -0 = 0
I (51564) USB_HCDC: tx0 flush -0 = 0
W (51568) IOT_USBH: Resetting USB Driver
W (51568) 4g_main: Modem Board Event: USB disconnected
W (51573) IOT_USBH: Resetting default pipe
W (51684) IOT_USBH: pipe=0x3fcb3bcc clear failed
I (51684) IOT_USBH: iot_usbh_pipe_deinit: pipe state = 1
I (51684) IOT_USBH: Pipe deinit succeed, addr: 00
I (51690) IOT_USBH: hcd recovering
I (51694) IOT_USBH: Port power: ON Succeed
I (51798) IOT_USBH: Waiting USB Connection
I (52360) modem_board: reconnect after 5s…

Hi @lebies
Is this problem solved?

Hi , yes seems that it jumped into flash mode.

idVendor 0x2ecc
idProduct 0x3004
You can measure the USB_BOOT with an oscilloscope.

And why did the device disconnect?