Hi,
I would like to experiment a bit with the modem (send AT commands etc.). I tried with minicom (as described here : PinePhone - PINE64), but I can’t input anything (the screen stay black with only the help message, and nothing happens whatever key I press, except CTRL+A
ones…). I also tried raw cat/echo to /dev/ttyUSB2
, but nothing is outputed…
inxi
System:
Kernel: 5.11.9-1-MANJARO-ARM aarch64 bits: 64 compiler: gcc v: 10.2.0
parameters: loglevel=4 console=tty0 console=ttyS0,115200
earlycon=uart,mmio32,0x01c28000 consoleblank=0 boot=PARTUUID=bd9e0736-01
root=PARTUUID=bd9e0736-02 rw rootwait quiet
bootsplash.bootfile=bootsplash-themes/manjaro/bootsplash
Console: tty 0 DM: SDDM Distro: Manjaro ARM
Machine:
Type: ARM Device System: Pine64 PinePhone (1.2) details: N/A
serial: <filter>
Battery:
ID-1: axp20x-battery charge: 85% condition: N/A volts: 4.2/3.0 model: N/A
type: N/A serial: N/A status: Charging
Memory:
RAM: total: 2.92 GiB used: 700.9 MiB (23.4%)
RAM Report: missing: Required program dmidecode not available
CPU:
Info: Quad Core model: N/A variant: cortex-a53 bits: 64 type: MCP
arch: ARMv8 family: 8 model-id: N/A stepping: 4 microcode: N/A bogomips: 0
Speed: 648 MHz min/max: 648/1152 MHz Core speeds (MHz): 1: 648 2: 648 3: 648
4: 648
Features: aes asimd cpuid crc32 evtstrm fp pmull sha1 sha2
Vulnerabilities: Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: spec_store_bypass status: Not affected
Type: spectre_v1 mitigation: __user pointer sanitization
Type: spectre_v2 status: Not affected
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: sun50i-a64-mali driver: lima v: kernel bus ID: N/A
chip ID: allwinner:1c40000
Device-2: sun50i-a64-dw-hdmi driver: sun8i_dw_hdmi v: N/A bus ID: N/A
chip ID: allwinner:1ee0000
Device-3: sun50i-a64-display-engine driver: sun4i_drm v: N/A bus ID: N/A
chip ID: allwinner:display-engine
Display: server: X.org 1.20.10 compositor: kwin_wayland driver: modesetting
alternate: fbdev tty: 315x75
Message: Unable to show advanced data. Required tool glxinfo missing.
Audio:
Device-1: sun50i-a64-dw-hdmi driver: sun8i_dw_hdmi bus ID: N/A
chip ID: allwinner:1ee0000
Device-2: simple-audio-card driver: N/A bus ID: N/A
chip ID: simple-audio-card:hdmi-sound
Device-3: simple-audio-card driver: asoc_simple_card bus ID: N/A
chip ID: simple-audio-card:sound
Sound Server: ALSA v: k5.11.9-1-MANJARO-ARM
Network:
Device-1: regulator-fixed driver: reg_fixed_voltage v: N/A port: N/A
bus ID: N/A chip ID: regulator-fixed:vbat-wifi
Device-2: mmc-pwrseq-simple driver: pwrseq_simple v: N/A port: N/A
bus ID: N/A chip ID: mmc-pwrseq-simple:wifi-pwrseq
Device-3: sun50i-a64-emac driver: N/A port: N/A bus ID: N/A
chip ID: allwinner:soc
IF: wlan0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: link
IF-ID-1: wwan0 state: unknown mac: N/A
IP v4: <filter> type: noprefixroute scope: global broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: global
WAN IP: <filter>
Drives:
Local Storage: total: 44.03 GiB used: 8.20 GiB (18.6%)
SMART Message: Required tool smartctl not installed. Check --recommends
ID-1: /dev/mmcblk0 model: N/A size: 14.91 GiB block size: physical: 512 B
logical: 512 B serial: <filter> scheme: MBR
ID-2: /dev/mmcblk2 model: DA4032 size: 29.12 GiB block size: physical: 512 B
logical: 512 B serial: <filter> rev: 0x8
Message: No Optical or Floppy data was found.
RAID:
Message: No RAID data was found.
Partition:
ID-1: / raw size: 14.67 GiB size: 14.38 GiB (98.01%) used: 8.16 GiB (56.7%)
fs: ext4 block size: 4096 B dev: /dev/mmcblk0p2 label: ROOT_MNJRO
uuid: 04cb10dd-5377-4b79-bd5f-f98459fb9d81
ID-2: /boot raw size: 213.6 MiB size: 213.4 MiB (99.89%)
used: 38.1 MiB (17.9%) fs: vfat block size: 512 B dev: /dev/mmcblk0p1
label: BOOT_MNJRO uuid: BFDA-4587
Swap:
Kernel: swappiness: 60 (default) cache pressure: 100 (default)
ID-1: swap-1 type: zram size: 4.39 GiB used: 2.2 MiB (0.1%) priority: 100
dev: /dev/zram0
Unmounted:
Message: No unmounted partitions found.
USB:
Hub: 1-0:1 info: Full speed (or root) Hub ports: 1 rev: 2.0 speed: 480 Mb/s
chip ID: 1d6b:0002
Hub: 2-0:1 info: Full speed (or root) Hub ports: 1 rev: 2.0 speed: 480 Mb/s
chip ID: 1d6b:0002
Device-1: 2-1:9 info: Quectel Wireless Solutions EC25 LTE modem
type: <vendor specific> driver: option,option1,qmi_wwan interfaces: 5
rev: 2.0 speed: 480 Mb/s chip ID: 2c7c:0125
Hub: 3-0:1 info: Full speed (or root) Hub ports: 1 rev: 1.1 speed: 12 Mb/s
chip ID: 1d6b:0001
Hub: 4-0:1 info: Full speed (or root) Hub ports: 1 rev: 1.1 speed: 12 Mb/s
chip ID: 1d6b:0001
Hub: 5-0:1 info: Full speed (or root) Hub ports: 1 rev: 2.0 speed: 480 Mb/s
chip ID: 1d6b:0002
Sensors:
System Temperatures: cpu: 30.8 C mobo: N/A
Fan Speeds (RPM): N/A
Info:
Processes: 176 Uptime: 13h 35m Init: systemd v: 247 Compilers: gcc: 10.2.0
Packages: pacman: 787 lib: 181 flatpak: 0 Shell: Zsh (sudo) v: 5.8
running in: tty 0 (SSH) inxi: 3.1.08
lsusb
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 009: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Thus, I have several question :
-
How applications communicate with the modem ? does it all pass through
/dev/ttyUSB2
, or is it just a debug / configuration interface, and there are sysfs binding ? 1.a) in particular, how does communicate the kernel (thewwan0
interface) -
Is there some sevices to disable to access it with
minicom
? -
(optionnal since I may easily find the answer) What does
minicom
do thatecho
/cat
don’t ?