Hi All, We have a custom WP7702 board that we are currently building test firmware for. The radio is not yet used, but we have several IO peripherals connected. All is working fine when the USB is connected (logging via ssh connection confirms this). We also have two SPI displays connected which sh…

Or you can run this legato app to make the module wake up [image] Unable to ssh on eth0 (RJ45) mangOH Green I guess the module has gone to sleep mode after you unplugged the USB cable. Please run the app to make the module still awake after USB disconnect. wakeup_app.ra…

This is a part from the log. This only occurs when USB is disconnected and the module tries to sleep several times per second… 8 05:00:01 swi-mdm9x28-wp user.info kernel: [189784.501309] PM: Syncing filesystems … done. Jan 8 05:00:01 swi-mdm9x28-wp user.debug kernel: [189784.536736] PM: Preparing…

you can try this before removing the USB cable: echo NO_SLEEP > /sys/power/wake_lock

Hi, Thank you, this indeed does the trick! However, it does not stick after a reboot of the module. Is there an AT command with the same function that is persistent over reboots? Or should I write this value in the system from my user application? Best regards, Frans.

yes, you can use an unsandboxed application to issue out this command by system() API.

Hi, Thanks for the suggestion, this solves the problem for me! Best regards, Frans.

Click the Power Management tab. If you want USB ports to keep supplying power in sleep mode, just uncheck “Allow the computer to turn off this device to save power“. Or check it to let 192.168 l 8.1 Windows turn off USB ports to save powe This problem may occur if you are using the wrong or ou…

USB disconnection sleep mode

Build your own

jyijyi April 2, 2022, 3:26pm 6

Or you can run this legato app to make the module wake up

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USB disconnection sleep mode

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