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Dell DW5811e / Sierra Wireless EM7455 WWAN Not Working


Nancy10
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While the EM7430 works with my kext. (I guess the product ID needs to be adjusted still). The EM7455 seems not. What I did:

 

Wrote the kext for DW5811e / EM7411 according to the correct PID & VID attached above. Which after it appears on WANN section (location id show xxxxxxxx / 0 as others also have in their screen). Then with the correct APN the error shows:

1229755362_Screenshot2020-05-10at21_26_37.png.c25d5315087202ea84b2b854d0558c02.png

 

So I updated the firmware and all config settings using LIVE UBUNTU CD 18.04 with:

https://github.com/danielewood/sierra-wireless-modems

 

His autoscript is perfect for updating FW, configuring the whole card according to our needs & sets the PID/VID to generic to bypass any vendor locks.

 

Whilst I updated the kext to reflect all MC/EM7455 cards PID/VID (Lenovo / DELL / Generic). Still the error "Network Connection ... " shows. Please also see the location difference:

 

250178255_Screenshot2020-05-10at21_31_17.png.aa15bf0699c5f17204c1c5b9ff1e3728.png

522999669_Screenshot2020-05-10at21_32_09.png.1bbdbbb5d8ba1c350bd6d421cd5a44ff.png

NOTE the firmware: SWI9X30C_02.08.02.00 r5428 CARMD-EV-FRMWR2 2016/01/06 20:38:53

While at!priid? shows the updated firmware:

SWI9X30C_02.33.03.00_00_00_GENRIC

 

1229755362_Screenshot2020-05-10at21_26_37.png.c25d5315087202ea84b2b854d0558c02.png

 

So I manually check the connection using COM port:

screen /dev/tty.wwan 115200

screen /dev/tty.wwan 115200

Which after I'm able to manually connect using at commands. Any ideas where to look? Perhaps it is the interface mapping?

				<key>InterfaceMapping</key>
				<dict>
					<key>0</key>
					<dict>
						<key>name</key>
						<string>wwanDM</string>
					</dict>
					<key>2</key>
					<dict>
						<key>name</key>
						<string>wwanGPS</string>
					</dict>
					<key>3</key>
					<dict>
						<key>name</key>
						<string>wwan</string>
					</dict>
				</dict>

 

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Hi!

Did anybody try setting modem port to 6 or 8 as described here?:

https://osxlatitude.com/forums/topic/8006-sierra-wireless-qmi-modules-mcem73xx77xx8805etc-dell-dw557058085809etc/

Quote

 

For Legacy use, Modem port must be enabled in configurations modules:

example, USBCOMP = 6, or 8

 

 

@influenist  this script that you mentioned sets the card in MBIM only (+AT) mode. If Im not mistaken for OSX and this kext we need to put the card in the mode that supports QMI mode also? 

Quote

- Sets MBIM Mode with AT Commands Access

https://www.ttl.one/2018/07/sierra-wireless-lte-autoflashing-em74xx.html

 

So for example on this page that was linked scripts github page (https://zukota.com/sierra-wireless-em7455-how-to-enable-com-ports/) the modem supports mode 6,8, and 9, and was set in mode 8 that doesn't support QMI

Quote

 8 - DM  NMEA  AT  MBIM  SUPPORTED

But if we set modem (manually, without script) to modem config 6, that mode support QMI

Quote

 6 - DM  NMEA  AT  QMI  SUPPORTED

 

Can anybody please check if this solves this issue so I can go order this card on Ali? :)

instructions here: https://zukota.com/sierra-wireless-em7455-how-to-enable-com-ports/ 

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No. I try USBCOMP=8 and USBCOMP=6. Error is in 

Thu Oct  1 20:02:53 2020 : Initializing phone: ATE0V1&F&D2&C1S0=0
Thu Oct  1 20:02:53 2020 : Initializing PDP context: AT+CGDCONT=1,"IP","internet.ntc"
Thu Oct  1 20:02:53 2020 : Dialing: ATD*99***1#
Thu Oct  1 20:02:53 2020 : Waiting for connection
Thu Oct  1 20:02:53 2020 : Modem error; the modem is not responding.
Thu Oct  1 20:02:53 2020 : CCLExit: -6019 (Modem error, modem not responding.)
Thu Oct  1 20:02:53 2020 : Connect script failed

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Hey @miki991 , I tried all sorts of combinations yet can't remember exactly though if I followed up your notes. Even made the kext working for the 3 variants. I'll retry this at some later stage as I'm too caught up with work / private life. Why not buy the card and help the community ?! :-)

 

Attached the latest version I could find in my backedup EFIs.

Legacy_Sierra_QMI.kext.zip

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On 10/1/2020 at 8:19 PM, marvin_666 said:

No. I try USBCOMP=8 and USBCOMP=6. Error is in 

Thu Oct  1 20:02:53 2020 : Initializing phone: ATE0V1&F&D2&C1S0=0
Thu Oct  1 20:02:53 2020 : Initializing PDP context: AT+CGDCONT=1,"IP","internet.ntc"
Thu Oct  1 20:02:53 2020 : Dialing: ATD*99***1#
Thu Oct  1 20:02:53 2020 : Waiting for connection
Thu Oct  1 20:02:53 2020 : Modem error; the modem is not responding.
Thu Oct  1 20:02:53 2020 : CCLExit: -6019 (Modem error, modem not responding.)
Thu Oct  1 20:02:53 2020 : Connect script failed

My modem also somehow reports "internet.ntc" and "NTC" instead of "internet.mts.ru" and "MTS RUS", though with other SIM card it displays "internet.mts.ru", and AT commands with both SIM cards show "MTS-RUS".

I tried to connect manually using AT commands and

ATD*99***1#

gives ERROR

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