- Dec 22, 2012
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I am building an application that collects RS232 data via USB. This requires the Nexus 7 to be rooted. No problem.
The application will run 24 by 7 and therefore this means that the Nexus must be charged during operation.
The Nexus 7 however used a USB charger which can only charge the device when beeing in slave-mode. Putting the device in host-mode also means that the Nexus will provide power to other devices in stead of use power to charge itself.
I tried a lot but nothing really worked:
- supplying power to pin 1 and 5 allthougt the Nexus was in host-mode
- supplying power to the pogo pins
- custom rom that stops the Nexus providing power while in host-mode - this worked, but it did not longer receive data via the USB port
I tried another tablet (Yarivik 9-200 TAB) without succes - this tablet did not retrieve any data via USB/RS232. So I returned testing with the Nexus.
Now I am thinking of removing the battery completely and provide power directly to the device itself.
Is there anyone out there who already solved this problem? With software or hardware - I don't care, as long as it works.
Recommendations for another tablet which solves my problem are welcome too.
Many thanks !!!
The application will run 24 by 7 and therefore this means that the Nexus must be charged during operation.
The Nexus 7 however used a USB charger which can only charge the device when beeing in slave-mode. Putting the device in host-mode also means that the Nexus will provide power to other devices in stead of use power to charge itself.
I tried a lot but nothing really worked:
- supplying power to pin 1 and 5 allthougt the Nexus was in host-mode
- supplying power to the pogo pins
- custom rom that stops the Nexus providing power while in host-mode - this worked, but it did not longer receive data via the USB port
I tried another tablet (Yarivik 9-200 TAB) without succes - this tablet did not retrieve any data via USB/RS232. So I returned testing with the Nexus.
Now I am thinking of removing the battery completely and provide power directly to the device itself.
Is there anyone out there who already solved this problem? With software or hardware - I don't care, as long as it works.
Recommendations for another tablet which solves my problem are welcome too.
Many thanks !!!