IoT hat disconnecting and reconnecting rapidly

testsubject42 · December 6, 2021, 3:29am

I have an IoT hat with a Telit ME910C1-WW chip. When I try to set it up and run commands or programs, it doesnt work. In the minicom window, a box will frequently open up that says cannot open /dev/ttyUSB2 (which is the correct port it is in). I’m able to run AT and have it return OK, but other commands return ERROR. I think this may be related to the main problem, being the disconnecting and reconnecting. When I run dmesg | grep tty the RPi returns:

[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=1824 bcm2708_fb.fbheight=984 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=tty1 console=ttyS0,115200 root=PARTUUID=9357553f-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
[ 0.000371] printk: console [tty1] enabled
[ 3.013870] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 114, base_baud = 0) is a PL011 rev2
[ 3.017152] printk: console [ttyS0] disabled
[ 3.017300] 3f215040.serial: ttyS0 at MMIO 0x3f215040 (irq = 86, base_baud = 50000000) is a 16550
[ 3.017562] printk: console [ttyS0] enabled
[ 7.989587] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 7.991292] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 7.993235] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 78.854035] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 78.854462] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 78.854829] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 79.166277] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 79.167599] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 79.168826] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 90.272321] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 90.272861] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 90.273515] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 96.077324] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 96.078934] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 96.080351] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 104.354877] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 104.360448] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 104.361690] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 110.170169] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 110.171265] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 110.175636] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 117.156807] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 117.157949] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 117.159331] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 122.978345] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 122.979153] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 122.981778] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 129.958756] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 129.959383] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 129.959927] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 140.117419] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 140.119259] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 140.120862] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 201.478489] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 201.479003] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 201.480295] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 201.795265] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 201.799220] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 201.799923] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 213.672548] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 213.675777] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 213.676504] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 219.477211] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 219.478086] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 219.478969] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 308.721265] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 308.722032] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 308.722969] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 309.026909] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 309.028197] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 309.029521] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 320.682302] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 320.682923] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 320.683533] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 326.488502] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 326.489742] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 326.490754] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 411.887531] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 411.888402] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 411.890425] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 412.218022] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 412.218500] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 412.218916] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 423.596415] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 423.597021] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 423.597572] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 429.399583] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 429.400422] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 429.401321] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 513.910823] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 513.914131] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 513.917428] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 514.229752] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 514.235648] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 514.244678] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 525.998338] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 526.001559] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 526.004829] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 531.800835] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 531.802182] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 531.803434] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 619.789128] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 619.791088] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 619.793397] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 620.122136] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 620.126303] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 620.127811] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 631.728745] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 631.729882] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 631.731570] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 637.537985] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 637.539132] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 637.540337] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 730.035748] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 730.042540] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 730.044538] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 730.354457] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 730.355016] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 730.355540] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 742.066767] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 742.067384] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 742.068079] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 747.876669] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 747.878370] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 747.879968] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 755.124701] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 755.125268] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 755.125952] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 760.926853] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 760.928584] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 760.930095] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 767.926881] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 767.927495] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 767.929287] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 773.736753] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 773.738001] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 773.738975] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 781.762041] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 781.766304] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 781.767923] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 787.558265] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 787.560992] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 787.561869] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 871.124955] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 871.125907] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 871.126324] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 871.406637] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 871.407719] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 871.408922] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 883.386861] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 883.387845] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 883.389131] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 889.200225] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 889.202909] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 889.203726] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 916.925027] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 916.926284] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 916.927465] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 922.728952] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 922.730709] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 922.732196] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 983.378417] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 983.379102] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 983.379726] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 983.731424] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 983.732029] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 983.732487] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 995.262330] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 995.262956] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 995.263569] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1001.074163] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1001.076386] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1001.077815] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1086.344073] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1086.345076] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1086.346877] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1086.668267] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1086.668801] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1086.672710] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1098.432286] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1098.432912] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1098.433629] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1104.240162] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1104.241461] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1104.242651] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1189.305990] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1189.307698] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1189.308622] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1189.608925] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1189.609390] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1189.609817] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1201.346287] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1201.347105] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1201.348031] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1207.152023] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1207.153787] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1207.155198] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1215.428943] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1215.430206] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1215.431697] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1221.245417] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1221.247232] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1221.248829] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1238.982341] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1238.982970] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1238.983733] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1245.044739] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1245.045872] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1245.047889] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1326.202222] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1326.202933] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1326.203354] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1326.530304] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1326.531560] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1326.532859] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1338.312287] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1338.312902] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1338.313461] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1344.122524] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1344.123856] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1344.124923] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1352.394881] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1352.396142] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1352.397744] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1358.203090] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1358.204879] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1358.206279] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1366.476920] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1366.478354] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1366.480211] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1372.282185] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1372.283336] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1372.284268] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1378.510321] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1378.510938] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1378.511543] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1386.362648] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1386.364332] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1386.365899] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1449.157349] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1449.159663] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1449.160918] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1449.470819] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1449.471306] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1449.471765] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1461.200327] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1461.200937] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1461.201528] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1467.003143] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1467.004933] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1467.006468] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1551.434219] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1551.435071] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1551.435917] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1551.765875] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1551.766464] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1551.766932] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1563.346328] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1563.346992] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1563.347645] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1569.406870] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1569.409001] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1569.410136] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1654.155606] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1654.156550] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1654.157688] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1654.452628] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1654.453188] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1654.454936] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1666.260394] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1666.261148] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1666.261892] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1672.067125] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1672.069425] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1672.070897] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1759.167689] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1759.168524] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1759.169293] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1759.463626] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1759.464198] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1759.464781] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1771.222357] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1771.222961] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1771.223545] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1777.040658] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1777.052165] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1777.053550] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1861.118371] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1861.120173] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1861.121137] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1861.424321] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1861.424772] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1861.425200] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1873.112454] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1873.114840] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1873.115639] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1878.920690] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1878.922020] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1878.926219] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1964.080407] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1964.081351] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1964.082179] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1964.395233] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1964.395838] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1964.396331] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1976.026306] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1976.026929] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1976.027554] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1981.827551] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1981.829294] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1981.830853] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2066.023833] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 2066.025093] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 2066.026175] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 2066.335947] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2066.336430] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2066.336842] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2077.916442] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 2077.921587] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 2077.923811] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 2083.977581] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2083.979025] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2083.980188] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2167.995666] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 2167.996410] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 2167.997102] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 2168.325355] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2168.325859] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2168.326323] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2180.062294] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 2180.065631] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 2180.066357] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 2185.872600] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2185.873908] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2185.875108] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 2272.775662] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 2272.776198] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 2272.776705] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 2273.104792] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 2273.109001] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 2273.109652] usb 1-1.1.2: GSM modem (1-port) converter now attached to ttyUSB2

(I cut off some to fit the character limit)

Is there something I’m doing wrong or is the HAT messed up? Any help is greatly appreciated.

ensar · December 6, 2021, 6:20am

Hi @testsubject42 ,

The module appears to be undetected. Sorry for this situation. We will replace the product with a new one for you. Please email hello@sixfab.com and our team will contact you right away.

zskatona · June 12, 2023, 2:49am

Hi @ensar ,
I have the same issue. It worked ok for about half a day and then it became intermittent and now it’s disconnecting/reconnecting to USB very frequently. Is this a hardware issue?

[    6.438037] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[    6.438980] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[    6.447712] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[   48.500099] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[   48.500582] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[   48.501113] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[   54.259744] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[   54.260985] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[   54.262136] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  105.021757] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  105.023581] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  105.037188] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  110.443419] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  110.444507] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  110.445583] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  118.446459] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  118.447470] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  118.448189] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  124.199704] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  124.200908] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  124.201961] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  151.149569] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  151.150719] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  151.151853] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  156.804258] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  156.805406] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  156.806535] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  294.874838] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  294.875552] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  294.888843] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  300.413138] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  300.414279] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  300.415399] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  308.672201] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  308.673558] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  308.675101] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  314.413594] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  314.414033] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  314.414437] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  328.820320] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  328.826697] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  328.830811] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  334.428345] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  334.429310] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  334.430715] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2

ensar · June 12, 2023, 10:56am

Hi @zskatona ,

Which module do you have? Are you using Sixfab CORE?

We can also and often see that the module connects and disconnects again from the host and it is mostly caused by the hardware issue.

For example,

The connection is unstable
The power supply could provide enough power.
The USB cable is too long and too easy disturbed. As we know, USB is a kind of high speed bus.
The USB bus cannot meet the USB 2.0 standard specification.

zskatona · June 12, 2023, 1:18pm

@ensar , I have the 3G/4G & LTE HAT with the Telit ME910C1-WW. I am using a Raspberry 4 and the very short USB cable that came with the hat. Power supply should be sufficient as well.

nicolas · March 6, 2024, 5:45am

Did you ever get this resolved? I am having the same problem with 2 of the modems I purchased, rpi hats using the CORE sim card, and both are experiencing disconnect / reconnect.

Seems to be a hardware bug… As I followed the tutorial to a T and still doesn’t work, and all AT parameters look good, doesn’t make sense…

testsubject42 · March 6, 2024, 12:39pm

For me it was a defective module; we ordered a replacement and were able to set it up. Odd that it would be happening for both modules though. We were also likely using an older version then what is on the market today.