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--- doc:appunti:hardware:tl-mr6400_openwrt [2023/02/01 16:25] – [The SNMP Daemon] niccolo
+++ doc:appunti:hardware:tl-mr6400_openwrt [2025/07/02 16:54] (current) – [LTE signal strenght LEDs] niccolo
@@ Line 53: / Line 53: @@
 ===== Upgrade the uqmi package =====
-Download the custom **uqmi** packages for OpenWRT 22.03.2 here: **[[https://github.com/mrhaav/openwrt/raw/master/22.03.2/uqmi_2022-11-29-0.10_mipsel_24kc.ipk|uqmi_2022-11-29-0.10_mipsel_24kc.ipk]]**.
+Using the stock **uqmi** package provided by OpenWRT 22.03.2 I was not able to bring up the LTE interface. The error message shown by **logread** was:
+<code>
+daemon.notice netifd: lte4g (2329): Command failed:
+    ubus call network.interface notify_proto
+    { "action": 0, "link-up": false, "keep": false, "interface": "lte4g" }
+    (Permission denied)
+daemon.notice netifd: Interface 'lte4g' is now down
+daemon.notice netifd: Interface 'lte4g' is setting up now
+daemon.notice netifd: lte4g (2343): Waiting for SIM initialization
+</code>
+I downloaded a custom **uqmi** packages for OpenWRT 22.03.2 here: **[[https://github.com/mrhaav/openwrt/raw/master/22.03.2/uqmi_2022-11-29-0.10_mipsel_24kc.ipk|uqmi_2022-11-29-0.10_mipsel_24kc.ipk]]**.
 The **uqmi** depends upon **libubox** and **libblobmsg-json**, these are the exact versions that satisfied the dependency in my installation:
@@ Line 61: / Line 73: @@
 ^ libblobmsg-json20220515  | 2022-05-15-d2223ef9-1  |
+Now the ''logread'' output is OK, except that IPv6 is not negotiated (may be a fault by the Iliad provider):
+<code>
+kern.info kernel:  qmi_wwan 1-1:1.4: cdc-wdm0: USB WDM device
+kern.info kernel:  qmi_wwan 1-1:1.4 wwan0:
+                   register 'qmi_wwan' at usb-101c0000.ehci-1,
+                   WWAN/QMI device, 1a:45:b9:77:47:66
+kern.info kernel:  usbcore: registered new interface driver qmi_wwan
+kern.info kernel:  usbcore: registered new interface driver option
+kern.info kernel:  usbserial: USB Serial support registered for GSM modem (1-port)
+daemon.notice netifd: Interface 'lte4g' is setting up now
+daemon.notice netifd: lte4g (1900): PINcode disabled
+daemon.notice netifd: lte4g (1900): Data format set to raw-ip
+daemon.notice netifd: lte4g (1900): Default profile: 1
+daemon.notice netifd: lte4g (1900): Change default profile
+daemon.notice netifd: lte4g (1900):  apn:  to iliad
+daemon.notice netifd: lte4g (1900):  authentication: none to both
+daemon.notice netifd: lte4g (1900): Airplane mode off
+daemon.notice netifd: lte4g (1900):  registered on 22250
+daemon.notice netifd: lte4g (1900): Registered to Iliad on LTE
+daemon.notice netifd: lte4g (1900): Connected with IPv4
+daemon.notice netifd: lte4g (1900): Unable to connect with IPv6
+daemon.notice netifd: lte4g (1900): Setting up wwan0
+daemon.notice netifd: Interface 'lte4g' is now up
+</code>
 ===== Configure the LTE connection =====
@@ Line 104: / Line 141: @@
 }
 </code>
+^ RSSI  ^ Usability      ^
+| -60   | Good           |
+| -70   | Acceptable     |
+| -90   | Barely usable  |
+The **uqmi** can be used to get several info about the current connection, e.g. the **MCC** (Mobile Country Code), **MNC** (Mobile Network Code), **TAC** (Tracking Area Code, knwon also as **LAC**, Local Area Code):
+<code>
+uqmi --device=/dev/cdc-wdm0 --get-system-info
+{
+        "wcdma": {
+                "service_status": "none",
+                "true_service_status": "none",
+                "preferred_data_path": false
+        },
+        "lte": {
+                "service_status": "available",
+                "true_service_status": "available",
+                "preferred_data_path": false,
+                "domain": "cs-ps",
+                "service": "cs-ps",
+                "roaming_status": "off",
+                "forbidden": false,
+                "mcc": "222",
+                "mnc": "50",
+                "tracking_area_code": 36035,
+                "enodeb_id": 344505,
+                "cell_id": 7,
+                "voice_support": false,
+                "ims_voice_support": false,
+                "cell_access_status": "all calls",
+                "registration_restriction": 0,
+                "registration_domain": 0
+        }
+}
+</code>
+:!: **NOTICE**: Some services - like [[https://www.opencellid.org/|www.opencellid.org]] - identify the cells using the **Cell ID**, which is actually the **ECI** (E-UTRAN Cell Identifier). That identifier is composed by the //enodeb_id// (20 bits) and the //cell_id// (8 bits), using the following formula:
+**ECI = enodeb_id * 256 + cell_id**
+So, in the example above, we have that the Cell ID is:
+**%%ECI = 344505 * 256 + 7 = 88193287%%**
@@ Line 185: / Line 268: @@
 #!/bin/sh
 RSSI="$1"
 if ! echo "$RSSI" | egrep -q '^[+-]?\d+$'; then
         echo "Usage: uqmi_led.sh [RSSI]"
         exit
 fi
 echo "$RSSI" > '/tmp/lte-rssi'
 LED1=$(readlink -f /sys/class/leds/white:signal1)
 LED2=$(readlink -f /sys/class/leds/white:signal2)
 LED3=$(readlink -f /sys/class/leds/white:signal3)
 if [ "$RSSI" -eq -200 ]; then
         echo none > $LED1/trigger
         echo none > $LED2/trigger
         echo none > $LED3/trigger
 elif [ "$RSSI" -le -90 ]; then
         echo default-on > $LED1/trigger
         echo none > $LED2/trigger
         echo none > $LED3/trigger
 elif [ "$RSSI" -le -60 ]; then
         echo default-on > $LED1/trigger
         echo default-on > $LED2/trigger
         echo none > $LED3/trigger
 else
         echo default-on > $LED1/trigger
         echo default-on > $LED2/trigger
         echo default-on > $LED3/trigger
 fi
 </code>
@@ Line 260: / Line 343: @@
 <code bash>
-snmpwalk -v 2c -c public 172.16.4.189 'NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."lte_rssi"'
+snmpwalk -v 2c -c public 192.168.1.1 'NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."lte_rssi"'
 NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."lte_rssi" = STRING: -65
 </code>
+===== Wake-on-LAN =====
+I was not able to instal the **wakeonlan** package because it depends upon Perl (not enough space on flash memory). Fortunately I was able to install **etherwake**, which requires only **4 kb**.
+===== Upgrade to OpenWRT 22.05.0 =====
+To upgrade from OpenWRT **22.03.3** to **22.05.0** we used the **sysupgrade** option, which preserves the existing configuration, at least partially.
+Download the new firmware **[[https://downloads.openwrt.org/releases/23.05.0/targets/ramips/mt76x8/openwrt-23.05.0-ramips-mt76x8-tplink_tl-mr6400-v5-squashfs-sysupgrade.bin|openwrt-23.05.0-ramips-mt76x8-tplink_tl-mr6400-v5-squashfs-sysupgrade.bin]]** to your PC. Connect the PC to one of the Ethernet ports of the router and point your browser to the LuCI web interface. Click the **System** => **Backup / Flash Firmware** page and then upload the firmware file to the router by clicking **Flash new firmware image**.
+Once the router reboots, you can access it via SSH or LuCI web, the network configuration should have been preserved.
+Beware that all the extra packages must be installed again, notably the **uqmi** package, required to drive the LTE modem for internet access, must be upgraded to version **[[https://raw.githubusercontent.com/mrhaav/openwrt/master/23.05.0/uqmi_2022-11-29-0.11_mipsel_24kc.ipk|uqmi_2022-11-29-0.11_mipsel_24kc.ipk]]**. That version is not included into the official repository and thus must be downloaded from the GitHub repository.
+The repository roots are:
+  * https://downloads.openwrt.org/releases/23.05.0/targets/ramips/mt76x8/
+  * https://downloads.openwrt.org/releases/23.05.0/packages/mipsel_24kc/
+This is the list of all the extra packages installed:
+^ Package                               ^ Space  ^
+| uqmi_2022-11-29-0.11_mipsel_24kc.ipk  |   92K |
+| openvpn                               |  228K |
+| luci-app-openvpn                      |  320K |
+| tcpdump-mini                          |  314K |
+| snmpd                                 |  540K |
+| luci-app-snmpd                        |    8K |
+| etherwake                             |    8K |
+| coreutils-base64                      |       |
+===== Sending and receiving SMS =====
+Once installed the **uqmi** package, there is a daemon process **/usr/bin/uqmi_d.sh** which is responsible for sending and receiving SMS messages. The program will check every 30 seconds if there is a file into the **send** directory and eventually save received SMS messages from the modem memory to the **received** directory:
+  * **/var/sms/send/**
+  * **/var/sms/received/**
+To send a message just create a text file into the **/var/sms/send/** directory; the first line must contain the recipient phone number, the following lines are the text message. E.g.
+<file>
++393274445556
+Hello, World!
+</file>
+Received messages will be saved automatically into **/var/sms/received/**, in files named something like **sms_20240426T150933**. The content will be something like:
+<file>
+[Phone Number|CallerID]
+Tex message.
+</file>
+If you stop the running uqmi_d.sh daemon, it is possibile to retrieve received messages from **sim** or from **me** (memory). Get first the list of messages availables and then retrieve one:
+<code>
+uqmi -d /dev/cdc-wdm0 --list-messages --storage me
+uqmi -s -d /dev/cdc-wdm0 --get-message 0 --storage me
+</code>
 ===== Web References =====
@@ Line 271: / Line 412: @@
   * **[[https://openwrt.org/docs/guide-user/base-system/led_configuration|OpenWRT - LED Configuration]]**
   * **[[https://forum.openwrt.org/t/tl-mr6400-v5-lte-disconnect-after-six-hours/125468|[TL-MR6400 v5] LTE “disconnect” after six hours]]**
+  * **[[https://www.techtrained.com/the-ultimate-cheat-sheet-for-lte-identifiers/|The Ultimate Cheat Sheet for LTE Identifiers]]**
+  * **[[https://mobilepacketcore.com/what-is-tracking-area-in-lte/|What is tracking area in LTE]]**