# \[ERR\] Timeout, couldn't get response on TELIT LE910C4-EU **URL:** \ **Category:** 3G/4G<E Base HAT\ **Tags:** usb, telit\ **Created:** [July 20, 2022, 10:28am UTC](https://community.sixfab.com/t/err-timeout-couldnt-get-response-on-telit-le910c4-eu/2121 "2022-07-20T10:28:11Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jaegersb](https://community.sixfab.com/user_avatar/community.sixfab.com/jaegersb/32/1189_2.png) [@jaegersb](https://community.sixfab.com/u/jaegersb)\ **Post date:** [July 20, 2022, 10:28am UTC](https://community.sixfab.com/t/err-timeout-couldnt-get-response-on-telit-le910c4-eu/2121/1 "2022-07-20T10:28:11Z")
Hello, I’ve got a Raspberry 3b with a TELIT HAT which used to work until last weekend. I thought it may be a SDK I compiled so: - I have gone back, cut a new SDXC card with a vanilla Raspian Bullseye, - (Un)plugged each cable at least twice, - swapped the HAT to another Raspberry for same result and back. In short, I am stuck. The device exists, but it isn’t responding. admin@sonia:~ $ lsusb Bus 001 Device 004: ID 1bc7:1206 Telit Wireless Solutions LE910C4-EU 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 **admin@sonia:~ $ atcom AT** **[ERR] Timeout, couldn’t get response** Takes 10 seconds and times out. minicom freezes on attempt. The wwan0 adapter has an IP and seems in working order, but has no connection: wwan0: flags=4163\ mtu 1500 inet 192.168.225.54 netmask 255.255.255.0 broadcast 192.168.225.255 inet6 fe80::fdab:2759:50e:cfe7 prefixlen 64 scopeid 0x20 ether e6:0c:62:f0:c6:c5 txqueuelen 1000 (Ethernet) RX packets 216 bytes 13175 (12.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 343 bytes 27100 (26.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 The SIM shows no connection to the network, even there is plenty of coverage (-66dBm) where it’s at. I have a bad feeling this could be a hardware issue. How to check? Remote support is enabled and token available. Thanks a lot JJ ---
**Author:** ![ensar](https://community.sixfab.com/user_avatar/community.sixfab.com/ensar/32/8_2.png) [@ensar](https://community.sixfab.com/u/ensar)\ **Post date:** [August 1, 2022, 10:26am UTC](https://community.sixfab.com/t/err-timeout-couldnt-get-response-on-telit-le910c4-eu/2121/2 "2022-08-01T10:26:55Z")
Hi, Is your device active? If so, could you PM me your remote-support token so that I can check and solve it? ---
**Author:** ![ensar](https://community.sixfab.com/user_avatar/community.sixfab.com/ensar/32/8_2.png) [@ensar](https://community.sixfab.com/u/ensar)\ **Post date:** [August 9, 2022, 11:25am UTC](https://community.sixfab.com/t/err-timeout-couldnt-get-response-on-telit-le910c4-eu/2121/3 "2022-08-09T11:25:07Z")
Thanks for sharing! This port is busy because the CORE service uses the modem’s _ **ttyUSB2** _ port. For this reason, when sending AT commands with atcom, commands can be sent from available ports with the `--port` parameter. ```auto $ atcom AT+CSQ --port /dev/ttyUSB4 AT+CSQ +CSQ: 99,99 ``` ```auto $ atcom AT+CREG? --port /dev/ttyUSB4 AT+CREG? +CREG: 0,0 ``` ```auto $ atcom AT+CGREG? --port /dev/ttyUSB4 AT+CGREG? +CGREG: 0,0 ``` Signal strength is unknown or cannot be detected. So it indicates that you are not registered on the network. Make sure your antenna is connected properly. ---
**Author:** ![jaegersb](https://community.sixfab.com/user_avatar/community.sixfab.com/jaegersb/32/1189_2.png) [@jaegersb](https://community.sixfab.com/u/jaegersb)\ **Post date:** [August 9, 2022, 1:16pm UTC](https://community.sixfab.com/t/err-timeout-couldnt-get-response-on-telit-le910c4-eu/2121/4 "2022-08-09T13:16:02Z")
Hi, not sure how your response is meant to help me. I installed with the installation script, no customizing or editing. It worked in July. It stopped when I tried to activate the GNSS. So I wiped the Raspi, reinstalled everything and since the HAT is not working anymore for me. Both antennas are attached and my reception level (measured next to the HAT) is -65dBm on 4G LTE. When I tried to run your commands /dev/ttyUSB0 has timeout, the remainder USB1-4 call OSError: [Errno 71] Protocol error jj@lara:~ $ atcom AT+CREG? --port /dev/ttyUSB0 [ERR] Timeout, couldn’t get response jj@lara:~ $ atcom AT+CREG? --port /dev/ttyUSB1 Traceback (most recent call last): File “/usr/local/bin/atcom”, line 8, in sys.exit(handler()) File “/usr/lib/python3/dist-packages/click/core.py”, line 829, in **call** return self.main(\*args, \*\*kwargs) File “/usr/lib/python3/dist-packages/click/core.py”, line 782, in main rv = self.invoke(ctx) File “/usr/lib/python3/dist-packages/click/core.py”, line 1066, in invoke return ctx.invoke(self.callback, \*\*ctx.params) File “/usr/lib/python3/dist-packages/click/core.py”, line 610, in invoke return callback(\*args, \*\*kwargs) File “/usr/local/lib/python3.9/dist-packages/atcom/cli.py”, line 215, in handler at = ATCom( File “/usr/local/lib/python3.9/dist-packages/atcom/cli.py”, line 48, in **init** self.serial = serial.Serial(port, baudrate, rtscts=rts\_cts, dsrdtr=dsr\_dtr) File “/usr/lib/python3/dist-packages/serial/serialutil.py”, line 244, in **init** self.open() File “/usr/lib/python3/dist-packages/serial/serialposix.py”, line 343, in open self.\_update\_dtr\_state() File “/usr/lib/python3/dist-packages/serial/serialposix.py”, line 691, in \_update\_dtr\_state fcntl.ioctl(self.fd, TIOCMBIS, TIOCM\_DTR\_str) OSError: [Errno 71] Protocol error