Omega2+ not broadcasting APN after upgrading custom kernel - how to reset

aobs · 7 Feb 2018, 09:23

I ran

 make menuconfig

to add huawei_cdc_ncm to the kernel and recompile the kernel. After that, I copied the image to the Omega2+ and ran

 sysupgrade lede-ramips-mt7688-omega2p-squashfs-sysupgrade.bin

The system reboots, but is not broadcasting the apn anymore.

I tried to reset by pushing the RESET button on the power dock for around 10 seconds. The led keeps flashing forever.

How can I reset the system back?

cas · 7 Feb 2018, 10:31

@aobs
If you can't connect to the Omega via wifi, probably Firmware Flashing from USB Storage via serial is your only remaining option.

aobs · 7 Feb 2018, 11:34

@cas Thanks. I only have a power dock so I cannot access the UART0 TX/RX pins. I ordered an expansion dock just now so that I can have access to the USB to serial connection. I tried using the UART1 TX/RX pins connected to the FT231X, but cannot get a serial device on my MAC. Looks like there is nothing I can do in the meantime.

Douglas Kryder · 7 Feb 2018, 16:24

@aobs might be worth trying RX0-pin13/TX0-pin12 while you wait.

ccs hello · 8 Feb 2018, 01:12

@aobs
It is WiFi SSID, not APN.

aobs · 8 Feb 2018, 04:20

@ccs-hello The SSID is actually the name of the access point.

aobs · 8 Feb 2018, 04:23

@Douglas-Kryder The power dock does not expose the RX0 and TX0 unfortunately.

Douglas Kryder · 8 Feb 2018, 07:12

@aobs oh, ok. it did occur to me that you might follow the various guides for applying power to the omega without a dock and then just attach necessary wires to the TX0/RX0 pins. but, maybe not.

aobs · 8 Feb 2018, 10:25

@Douglas-Kryder Did not try connecting without the dock before. Took your suggestion. Tried connecting the RX0/TX0 pins using pin header connectors. Still cannot get a serial connection. Probably, I will wait for the expansion dock and try it again.

Douglas Kryder · 8 Feb 2018, 19:09

@aobs just checking here but did you use a 3.3v usb to serial connection [cp210x] like one of these?
https://goo.gl/DnVmSX

aobs · 9 Feb 2018, 10:56

@Douglas-Kryder I am using https://www.sparkfun.com/products/13263

Douglas Kryder · 9 Feb 2018, 18:54

@aobs i think the FTDI [FT231X] is not compatible with the onion usb to uart SiLABS CP210x . might want to research that a bit.

aobs · 10 Feb 2018, 07:38

@Douglas-Kryder Yes, I have doubts too. I am buying this https://www.aliexpress.com/item/CJMCU-CP2102-MICRO-USB-to-UART-TTL-Module-6Pin-Serial-Converter-UART-STC-Replace-FT232-NEW/32499746290.html?spm=a2g0s.13010108.99999999.12.hvofLV.

György Farkas · 10 Feb 2018, 16:49

@aobs The FTDI FT231X adapter is working well with Omega2(+).
Connect one to your PC USB host port, run a terminal program (115200 8N1, no flow control) and perform a loopback test.

If the test is OK then connect RX to TX0, TX to RX0 and GND to GND (only! - neither 3.3V nor 5V), push an hold down the RESET BUTTON, switch Omega's power on, release the RESET BUTTON and you should see the U-Boot menu ...

... if you did not overwrite the bootloader previously.

aobs · 11 Feb 2018, 09:52

@György-Farkas Thanks! I finally got it working with the FT231X. For some reason, I need to reboot my MAC every time I make a connection to the Omega 2.