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15 December 2014 10:34 AM

VR7Bhildebr Newbie

Total Posts: 5

Joined 2014-11-25

Hello All, I am developing a program in VB and am having trouble with implementing the combined SC device profile.

I am actively receiving HRM data, and have basically cut / pasted this code and modified for the device profile of a combined speed and cadence sensor. I appear to be connected to my device, but am only receiving data from the response event (0x40) with a response that is only 3 bytes in length.

Previously, I received HRM data with a Broadcast event (0x4E) so I am not sure what might be going wrong.

Here is a snippet of the channel set up:

#CREATE CHANNEL TO RECEIVE SPEED AND CADENCE DATA (SLAVE)--------------------------------
        Dim SAC1_Channel As ANT_Channel = ANTDevice_0.getChannel(1)

        SAC1_Channel.assignChannel(User_ANT_Channel, UCNetNUm) #ANT CHANNEL SET FOR SLAVE
        SAC1_Channel.setChannelID(56463, False, 121, 0) #DEVICE NUM is 56463, 121 is DEVICE TYPE FOR SAC, 
        SAC1_Channel.setChannelPeriod(8086) #PERIOD FROM SAC DEVICE PROFILE
        SAC1_Channel.setChannelFreq(ucRF) #ucRF = 57
        SAC1_Channel.openChannel()


        #CREATE ANT CHANNEL TO SEND SPEED AND CADENCE DATA FROM SENSOR (MASTER)
        Dim SC_Transmit_ChannelNum As Byte = ANT_ReferenceLibrary.ChannelType.BASE_Master_Transmit_0x10

        Dim SC_transmit_channel As ANT_Channel = ANTDevice_0.getChannel(0)
        Dim SCtranstype As Byte = (1) #TRANS TYPE = 1 PER SAC DEVICE PROFILE

        SC_transmit_channel.assignChannel(SC_Transmit_ChannelNum, UCNetNUm) #SET TO MASTER CHANNEL
        SC_transmit_channel.setChannelID(56463, False, 121, SCtranstype) #56463 is Ben's COMBINED S&C Sensor
        SC_transmit_channel.setChannelPeriod(8086)
        SC_transmit_channel.setChannelFreq(ucRF)

        SC_transmit_channel.openChannel()

        AddHandler SAC1_Channel.channelResponse, AddressOf HandleSC #HANDLER TO RECEIVE DATA 

16 December 2014 03:24 PM #1

VR7Bhildebr Newbie

Total Posts: 5

Joined 2014-11-25

Hi All, just to provide an update, I managed to figure out the error with my code.


Dim SC_transmit_channel As ANT_Channel = ANTDevice_0.getChannel(0)

This section of code needed to be:


Dim SC_transmit_channel As ANT_Channel = ANTDevice_0.getChannel(1)

Apparently you need to assign the same channel number to both the slave and master device when initializing the channels. I am not sure I understand the underlying reason behind this, but as soon as i made the switch i started receiving data!

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