Hello support & community:
I am trying to install drivers for modem AG35 to work with raspberry pi (model 3 or 4) but failing on both cases.
My target is to be able to send AT commands through /dev/ttyUSB2 that should appear (I expect) after correctly installing any of those 2 drivers for my AG35 modem into linux (raspberry pi 3/4 kernel 6.1.21).
I have followed Quectel_LTE&5G_Linux_USB_Driver_User_Guide_V2.0.
In my understanding, AG35 works with either:
- Gobinet
- QMI_WWAN
The drivers in that package are apparently outdated, since when I tried to compile with my kernel 6.1.21, both of them had errors.
For Gobinet, I got the following error:
Quectel_GobiNet_Driver_V1.6 $ sudo make install ARCH=arm
ln -sf makefile Makefile
make ARCH=arm CROSS_COMPILE= -C /lib/modules/6.1.21-v7+/build M=/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6 modules
make[1]: Entering directory ‘/usr/src/linux-headers-6.1.21-v7+’
CC [M] /home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.o
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c: In function ‘qmap_register_device’:
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:358:21: warning: passing argument 1 of ‘memcpy’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
358 | memcpy (qmap_net->dev_addr, real_dev->dev_addr, ETH_ALEN);
| ^
In file included from ./include/linux/string.h:20,
from ./include/linux/bitmap.h:11,
from ./include/linux/cpumask.h:12,
from ./include/linux/mm_types_task.h:14,
from ./include/linux/mm_types.h:5,
from ./include/linux/buildid.h:5,
from ./include/linux/module.h:14,
from /home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:55:
./arch/arm/include/asm/string.h:20:22: note: expected ‘void *’ but argument is of type ‘const unsigned char *’
20 | extern void * memcpy(void *, const void *, __kernel_size_t);
| ^~~~~~
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c: In function ‘GobiNetDriverBind’:
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:854:32: error: assignment of read-only location ‘e’
854 | pDev->net->dev_addr[0] |= 0x02; / set local assignment bit */
| ^~
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:855:32: error: assignment of read-only location ‘pDev->net->dev_addr’
855 | pDev->net->dev_addr[0] &= 0xbf; / clear “IP” bit */
| ^~
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c: In function ‘GobiUSBNetProbe’:
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:2147:14: warning: passing argument 1 of ‘QuecPrintHex’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
2147 | PrintHex( &pGobiDev->mpNetDev->net->dev_addr[0], 6 );
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.c:66:
/home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/QMIDevice.h:325:19: note: expected ‘void *’ but arErrorgument is of type ‘const unsigned char *’
325 | void * pBuffer,
| ~~~~~~~~~^
make[2]: *** [scripts/Makefile.build:250: /home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6/GobiUSBNet.o] 1
make[1]: *** [Makefile:2012: /home/svic/raspi-modules/Quectel_GobiNet_Driver_V1.6] Error 2
make[1]: Leaving directory ‘/usr/src/linux-headers-6.1.21-v7+’
make: *** [makefile:32: default] Error 2
I was able to bypass if I comment the code into GobiUSBNet.c by modifying commenting following part, since error claims that pDev->net->dev_addr is at read-only location:
//#if 1 //def DATA_MODE_RP
// /* make MAC addr easily distinguishable from an IP header /
// if ((pDev->net->dev_addr[0] & 0xd0) == 0x40) {
// /clear this bit wil make usbnet apdater named as usbX(instead if ethX)/
// pDev->net->dev_addr[0] |= 0x02; / set local assignment bit /
// pDev->net->dev_addr[0] &= 0xbf; / clear “IP” bit */
// }
//#endif
Even when I was able to load the driver, I don’t see created the /dev/ttyUSB2 expected (not sure if even with correct compilation I will be able to get it.
I see device is recognized with dmesg:
dmesg
[ 1420.480818] usb 1-1.2.1: new low-speed USB device number 8 using dwc2
[ 1420.725257] usb 1-1.2.1: New USB device found, idVendor=0603, idProduct=0002, bcdDevice= 0.01
[ 1420.725313] usb 1-1.2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1420.725330] usb 1-1.2.1: Product: USB Composite Device
[ 1420.725344] usb 1-1.2.1: Manufacturer: SIPODEV
[ 1420.734790] input: SIPODEV USB Composite Device as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1/1-1.2.1:1.0/0003:0603:0002.0005/input/input8
[ 1420.802291] hid-generic 0003:0603:0002.0005: input,hidraw0: USB HID v1.10 Keyboard [SIPODEV USB Composite Device] on usb-3f980000.usb-1.2.1/input0
[ 1420.818216] input: SIPODEV USB Composite Device Mouse as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1/1-1.2.1:1.1/0003:0603:0002.0006/input/input9
[ 1420.819115] input: SIPODEV USB Composite Device Wireless Radio Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1/1-1.2.1:1.1/0003:0603:0002.0006/input/input10
[ 1420.883109] input: SIPODEV USB Composite Device System Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1/1-1.2.1:1.1/0003:0603:0002.0006/input/input11
[ 1420.888528] input: SIPODEV USB Composite Device Consumer Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1/1-1.2.1:1.1/0003:0603:0002.0006/input/input12
[ 1420.894187] hid-generic 0003:0603:0002.0006: input,hiddev96,hidraw1: USB HID v1.10 Mouse [SIPODEV USB Composite Device] on usb-3f980000.usb-1.2.1/input1
[ 1421.090831] usb 1-1.2.2: new full-speed USB device number 9 using dwc2
[ 1421.331118] usb 1-1.2.2: New USB device found, idVendor=27c0, idProduct=0819, bcdDevice= 1.13
[ 1421.331150] usb 1-1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1421.331166] usb 1-1.2.2: Product: WingCoolTouch
[ 1421.331174] usb 1-1.2.2: Manufacturer: WingCoolTouch
[ 1421.331180] usb 1-1.2.2: SerialNumber: 9LQ0172005164
[ 1421.339803] input: WingCoolTouch WingCoolTouch as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2/1-1.2.2:1.0/0003:27C0:0819.0007/input/input13
[ 1421.342942] hid-multitouch 0003:27C0:0819.0007: input,hiddev97,hidraw2: USB HID v1.10 Device [WingCoolTouch WingCoolTouch] on usb-3f980000.usb-1.2.2/input0
[ 1421.348135] hid-generic 0003:27C0:0819.0008: hiddev98,hidraw3: USB HID v1.10 Device [WingCoolTouch WingCoolTouch] on usb-3f980000.usb-1.2.2/input1
[ 1424.320917] hwmon hwmon1: Voltage normalised
[ 1427.821007] usb 1-1.5: new high-speed USB device number 10 using dwc2
[ 1427.963090] usb 1-1.5: New USB device found, idVendor=2c7c, idProduct=0435, bcdDevice= 3.18
[ 1427.963122] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1427.963133] usb 1-1.5: Product: LTE Module
[ 1427.963141] usb 1-1.5: Manufacturer: Quectel, Incorporated
[ 1427.963148] usb 1-1.5: SerialNumber: 9d1f3226
[ 1428.087675] GobiNet: loading out-of-tree module taints kernel.
[ 1428.087677] GobiNet: loading out-of-tree module taints kernel.
[ 1428.092300] GobiNet: Quectel_Linux&Android_GobiNet_Driver_V1.6
[ 1428.098984] GobiNet 1-1.5:1.4 eth1: register ‘GobiNet’ at usb-3f980000.usb-1.5, GobiNet Ethernet Device, aa:6b:f3:b0:1f:b9
[ 1428.102808] creating qcqmi1
[ 1428.104387] usbcore: registered new interface driver GobiNet
[ 1429.121100] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
@raspberrypi:~ $ lsusb
Bus 001 Device 010: ID 2c7c:0435 Quectel Wireless Solutions Co., Ltd. AG35 LTE modem
Bus 001 Device 009: ID 27c0:0819 Cadwell Laboratories, Inc. WingCoolTouch
Bus 001 Device 008: ID 0603:0002 Novatek Microelectronics Corp. Sino Wealth keyboard/mouse 2.4 GHz receiver
Bus 001 Device 007: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 003: ID 0424:ec00 Microchip Technology, Inc. (formerly SMSC) SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Microchip Technology, Inc. (formerly SMSC) SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Even when I can see eth1 & qcqmi1, I am not sure if I should get /dev/ttyUSB2 to send AT commands through it.
Could any of you could guide me if I am in the correct way to get /dev/ttyUSB2 when connecting my modem? Is my understanding correct that I could use Gobinet or QMI_WWAN?
Could you please send me the updated drivers for any of those?
I have read that is is preferable to use QMI_WWAN, however any of those that give me the possibility to send AT commands using /dev/ttyUSB2 would be good for me.
Thanks in advance.