Add modem-config-dump

This script will dump the config of the modem (ublox l2)
to /tmp/config/ublox-tobyl2.conf on boot

BugzID: 56305

recipes-connectivity/modem-config-dump/files/modem-config-dump.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+import serial
+import os
+import time
+
+CONF_PATH = '/tmp/config/'
+ser = serial.Serial('/dev/ttyACM0', 115200, timeout=0.5)
+while True:
+    try:
+        ser.read()
+        break
+    except Exception:
+        pass
+
+
+os.makedirs(CONF_PATH, exist_ok=True)
+config_file = open(CONF_PATH + '/ublox-tobyl2.conf', 'w')
+
+def read_config(cmd, label=''):
+    while True:
+        try:
+            ser.flushInput()
+            ser.write(cmd)
+            ser.write(b'\r')
+            s = ser.read_until(b'OK')
+            break
+        except Exception as e:
+            print("Exception : " + str(e))
+            time.sleep(1)
+            continue
+        
+    #if(len(s.decode('utf-8') < 1)):
+    
+    config_file.write(label + '\n')
+    config_file.write(s.decode('utf-8').strip("OK"))
+
+
+read_config(b'AT+CGMI', 'Manufacturer identification');
+read_config(b'AT+GMI', 'Manufacturer identification');
+read_config(b'AT+CGMM', 'Model identification');
+read_config(b'AT+GMM', 'Model identification');
+read_config(b'AT+CGMR', 'Firmware version identification');
+read_config(b'AT+GMR', 'Firmware version identification');
+
+config_file.write('-' * 80 + '\n' * 2)
+
+read_config(b'AT+UCGDFLT?', 'Initial EPS bearer / PDP context');
+read_config(b'AT+UBMCONF?', 'Boot mode configuration, 1 = router, 2 = bridge')
+read_config(b'AT+UUSBCONF?', 'USB profiles configuration')
+

recipes-connectivity/modem-config-dump/files/modem-config-dump.service

@@ -0,0 +1,12 @@
+[Unit]
+Before=ModemManager.service
+After=ublox-config.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/modem-config-dump
+
+[Install]
+WantedBy=ModemManager.service
+
+

recipes-connectivity/modem-config-dump/modem-config-dump.bb

@@ -0,0 +1,38 @@
+SUMMARY = "Dump of the modem config"
+DESCRIPTION = "Dump the config of the modem for debugging purposes"
+AUTHOR = "Alexandre Bard"
+
+SECTION = "connectivity"
+LICENSE = "GPLv2+"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
+PR = "r2"
+
+RDEPENDS_${PN}="python3-pyserial"
+
+inherit systemd
+
+SRC_URI =  " \
+    file://modem-config-dump.service \
+    file://modem-config-dump.py \
+    "
+
+S = "${WORKDIR}"
+
+INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
+
+SYSTEMD_SERVICE_${PN} = "modem-config-dump.service"
+SYSTEMD_AUTO_ENABLE ?= "enable"
+
+FILES_${PN}_append = " \
+                    /lib \
+                    /usr \
+                    "
+
+do_install () {
+    install -d ${D}${systemd_unitdir}/system/
+    install -m 0644 modem-config-dump.service ${D}${systemd_unitdir}/system/
+
+    install -d ${D}/usr/bin
+    install -m 0755 modem-config-dump.py ${D}/usr/bin/modem-config-dump
+}
+