ANT Forum

Hi everyone,

I have implemented an application for getting in realtime the data of Powertap P1 on my PC via an USB ANT+ stick.

I finished to implement the profile, cadence is going well such as all standards communication messages (calibration successful, crank length, etc..)

Issues :
=> I have no power transmitted (stay at 0 in page number 0x10)
=> no page number 0x12 ("Torque at Crank") sent by the sensor.
=> no page number 0x13 ("Torque Effectiveness & Pedal Smoothness") sent by the sensor .

Anyone could have an idea of what is going wrong here?...
Please, I need somebody help

Thanks !!!
     

Could you send the DeviceX.txt log from the device? The power value should be changing if the sensor is in use.

Page 0x12 and 0x13 are optional depending on the type of sensor. If you never receive page 0x12, this indicates that the sensor only supports the power only data page (0x10).

For more help on decoding bike power data, I would recommend looking at the "Recording Bike Power Data" Application Note. The source code does go through determining the type of power sensor it is decoding before processing the data.