I want to read the RSSI of my Huawei E3531. So I found some documentations that show an easy way to get those informations using the AT command. The problem is that I can't even connect to my Huawei E3531. I mean, it works really well as a modem. I have a good connection. But when I am looking for the device in dev, I just find 2 devices ("sdb" and "sgm") which seem to be 2 disc, but nothing to do with serial port.
So I tried somethin I found: -After I plugged the Huawei, I find the Idvendor and Idproduct doing an lsusb. -They I do a sudo modprobe usbserial vendor=0X"Idvendor" product=0X"Idproduct" -And then when I do dmesg I can read:
[ 1038.498282] usbcore: registered new interface driver usbserial
[ 1038.498299] usbcore: registered new interface driver usbserial_generic
[ 1038.498312] usbserial: USB Serial support registered for generic
Normally I should have something like:
usb 1-1: generic converter now attached to ttyUSB0
I think I have to say that it was not even possible to see the sdb and sgm from my mac, so I am doing this from my Ubuntu. And if I enable my wifi, the modem cannot connect ( so I do not see the sdb and sgm)
If someone need it here is the first part of the dmesg:
[ 742.756888] usb 3-1: USB disconnect, device number 6
[ 743.123706] usb 3-1: new high-speed USB device number 7 using xhci_hcd
[ 743.252854] usb 3-1: New USB device found, idVendor=12d1, idProduct=14dc
[ 743.252861] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 743.252865] usb 3-1: Product: HUAWEI Mobile
[ 743.252868] usb 3-1: Manufacturer: HUAWEI
[ 743.482312] cdc_ether 3-1:1.0 usb0: register 'cdc_ether' at usb-0000:00:14.0-1, CDC Ethernet Device, 9a:c2:9b:ee:4c:d9
[ 743.482859] usb-storage 3-1:1.2: USB Mass Storage device detected
[ 743.483249] scsi11 : usb-storage 3-1:1.2
[ 743.520839] audit: type=1400 audit(1427889713.269:79): apparmor="DENIED" operation="file_inherit" profile="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=3414 comm="nm-dhcp-client." lport=29180 family="inet" sock_type="dgram" protocol=17
[ 743.520857] audit: type=1400 audit(1427889713.269:80): apparmor="DENIED" operation="file_inherit" profile="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=3414 comm="nm-dhcp-client." lport=47709 family="inet6" sock_type="dgram" protocol=17
[ 744.481267] scsi 11:0:0:0: Direct-Access HUAWEI TF CARD Storage 2.31 PQ: 0 ANSI: 2
[ 744.481722] sd 11:0:0:0: Attached scsi generic sg2 type 0
[ 744.482933] sd 11:0:0:0: [sdb] Attached SCSI removable disk
[ 753.752310] audit: type=1400 audit(1427889723.496:81): apparmor="DENIED" operation="file_inherit" profile="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=3423 comm="nm-dhcp-client." lport=29180 family="inet" sock_type="dgram" protocol=17
[ 753.752328] audit: type=1400 audit(1427889723.496:82): apparmor="DENIED" operation="file_inherit" profile="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=3423 comm="nm-dhcp-client." lport=47709 family="inet6" sock_type="dgram" protocol=17
[ 1038.498282] usbcore: registered new interface driver usbserial
[ 1038.498299] usbcore: registered new interface driver usbserial_generic
[ 1038.498312] usbserial: USB Serial support registered for generic
Thank you again, if you can give me even a small idea, I will take it! see you soon
EDIT 9/04/2015 So I found something. Do an lsusb you will see your device as:
Bus 003 Device 020: ID 12d1:1f01 Huawei Technologies Co., Ltd.
1f01 is the Idproduct, but it can change sometime, because the modem goes to different mode on its own. If it is 1F01, do:
sudo usb_modeswitch -v 12d1 -p 1F01 -M '55534243123456780000000000000011062000000100000000000000000000'
This will force your device your device to change mode. Now your device will have an Idproduct iqual to 1001. Do an lsusb to see it:
Bus 003 Device 023: ID 12d1:1001 Huawei Technologies Co., Ltd. E169/E620/E800 HSDPA Modem
And you have 4 new usb dev: USB0, USB1, USB2 and USB3. Now I am going to try minicom to send the AT command.
so basically, my problem was that I could not see my modem as a serial. I explained how to do that, you have to force your modem with this command:
Then I tried Minicom, which is really nice, you just have to connect well using the right parameters like baud rate and port. So look for it and do some test. To see what you are writing in minicom, just enable local echo (ctrl+a then z to the option). So you can send all the information you want.
But I wanted to integrate it in a python script so here is my code:
So this worked for me, I hope it will help you! Cheers