SW startup guide for Vayu 3G

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Software overview for using Vayu-3G-A/Vayu-3GP-A Cape

For using the Vayu-3G-A/Vayu-3GP-A Cape, please ensure that you have the following :

Debian Wheezy image which has following :

1. USB drivers for the modem (21f5:2012) installed in kernel

2. PPS drivers enabled in kernel, required if GPS module is present.

3. Vayu Device tree overlay file

You can either download kernel patches containing the same to use with your existing images or you can download our prebuilt MicroSD card image or EMMC flasher image .

All the images and files and extra support on software can be found here :

http://www.yantrr.com/products/m2m-cape-for-beaglebone/support/


Note : There is a bug with USB hotplug for using USB HUB with Beaglebone black host port. So to efficiently be able to use the modem, follow our documentations for HW guide on it properly. Easier approach is to keep the alternate host port on cape populated with a usb device.


Device enable for Vayu-3G-A or 3GP-A Cape


The WCDMA modem has following interfaces available on the Cape and withBeaglebone Black :

1. Mini USB B Device port on Cape (P9) : It has to be connected to USB host port on Beaglebone Black.

2. SMA connector for WCDMA antenna(P7) : WCDMA antenna is connected here.

3. LED D2, 5V Power LED of Cape : This LED indicates that the Cape is powered on with 5V and WCDMA modem is also powered.

4. LED D4, SIGNAL LED : This LED is the SIGNAL Led for the WCDMA modem whose various blinking states denote the different states of the WCDMA Modem.

5. GPIO45 , ON/OFF PIN : It is the GPIO connected to Power ON/OFF pin of WCDMA Modem.

6. GPIO60, Hard Reset Pin : It is the GPIO connected to Reset pin of WCDMA Modem.

7. S1, ON/OFF switch : This push button switch is connected to Power ON/OFF pin of WCDMA modem.

8. S2, RESET switch : This push button switch is connected to Hard Reset pin of WCDMA modem.


GPIO45 and GPIO60 should be set high at all instances for the WCDMA modem to be available for use.

Power On Modem :

The Modem can be powered on by providing a low level pulse at ON/OFF Pin for 3-4s when the module is off.

It can be achieved by either using the push button switch S1 or GPIO45.

Power Off Modem:

The modem can be powered off by providing a low level pulse at ON/OFF pin for 3-4s when the module is On.

It can be achieved by either using the push button switch S1 or GPIO45.

Soft Resetting the Modem :

Power Off the Modem.

Wait for 1-2s atleast.

Power on the modem.

Wvdial Configuration for Debian Wheezy :

Note : All commands are recommended to executed as root user.

Note : USB drivers need to be installed in the kernel for the WCDMA modem to work.

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