EM7455 can't connect to profile

IoT Modules MC/EM Series
1

I’m running the latest Lede with an EM7455 in QMI mode. I set up a connection with uqmi, and I get the following from the AT commands:

at!gstatus?
!GSTATUS:
Current Time: 331 Temperature: 31
Reset Counter: 3 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B26 LTE bw: 5 MHz
LTE Rx chan: 8763 LTE Tx chan: 26763
LTE CA state: NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Idle
IMS reg state: No Srv

PCC RxM RSSI: -79 RSRP (dBm): -108
PCC RxD RSSI: -103 RSRP (dBm): -139
Tx Power: 0 TAC: 35C9 (13769)
RSRQ (dB): -14.2 Cell ID: 06A90619 (111740441)
SINR (dB): 0.4

at+cgdcont?
+CGDCONT: 1,“IP”,“r.ispsn”,“0.0.0.0”,0,0,0,0

At+cgcontrdp
+CGCONTRDP: 1,5,r.ispsn,174.155.218.253,68.28.31.30,68.28.31.31

AT!SCACT?
!SCACT: 1,0

at!scact=1,1
OK
AT!SCACT?
!SCACT: 1,0
at!scact=1,1
ERROR
AT!SCACT?
!SCACT: 1,0

Lede-side commands:

ifconfig wwan0
wwan0 Link encap:Ethernet HWaddr 2A:CB:65:22:4D:2A
inet addr:174.155.218.253 Bcast:174.155.218.255 Mask:255.255.255.252
inet6 addr: fe80::28cb:65ff:fe22:4d2a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:70 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:804 (804.0 B) TX bytes:3964 (3.8 KiB)

route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 174.155.218.254 0.0.0.0 UG 0 0 0 wwan0
174.155.218.252 0.0.0.0 255.255.255.252 U 0 0 0 wwan0
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 br-lan

I can’t seem to make that connection between the 7455 and the host. at!scact=1,1 either returns OK or ERROR, but AT!SCACT? always returns 1,0

Am I missing a command?

Thanks
Peter

2

The driver is configured for 802.3 mode (default). That won’t work with the EM7455. You must use raw-ip mode. Search the LEDE/OpenWrt forums. Or just use the recent OpenWrt connect scripts. They will configure the driver to match the modem firmware mode.

3

Yes! That was it.

In case anyone reads this in the future with a similar problem:

ifdown wwan
echo Y > /sys/class/net/wwan0/qmi/raw_ip
ifup wwan

Thanks for the pointer.