ANT+ Examples with ANT+ Peripherals

[ag]

This is a really basic question, but please bear with me. This is my first time foraying beyond the world of Arduino! :)

I'm attempting to make an ANT+ bicycle power meter with the NRF52 DK. I want it to receive data from a Garmin GSC10 ANT+ bicycle speed/cadence sensor, and ultimately transmit power to a Garmin Edge 510. I've tried a couple of the ANT+ examples so far and am successfully able to see data printed to Putty via UART. I see that you can also use these examples with ANT simulation tools.

When I turn on my Garmin 510 and search for a power meter, nothing is found. Are the examples supposed to work directly with ANT+ peripherals? If so...

• Where do I set the ANT network key? "ANTPLUS_NETWORK_NUMBER"? I have the ANT+ network key from thisisant.com. Do I need to define all of the ANT+ network keys (8 hexes), or just pick one?
• Does it matter what I set for BPWR_CHANNEL_NUMBER?
• Is there anything else I need to set?

Again, sorry for the super basic questions. Any help is greatly appreciated, even if it's just pointing me in the right direction.

[Øyvind Karlsen]

Hi,

I don't know much about ANT, actually I'm pretty much on the same page as you, but I'll try to answer. The people who know ANT at the office are currently on vacation, so you may have better luck on the ANT forums.

Have you seen the documentation for the bike speed and cadence example?

The channel number should likely be set to the same as the sensor operates on (I think it should be 0), each profile has its own transmission type parameter (not sure how that influences things). The ANTPLUS_NETWORK_KEY is set in components/ant/ant_key_manager/config/ant_key_manager_config.h, once set it should be compatible with ANT+ devices.

The ANT+ receiver example in the SDK should print all the data received from a sensor over UART, and can be useful for debugging.

By the way the forums on THISISANT is a great resource for ANT related questions.

Best regards,

Øyvind

[ag]

Hi Øyvind,

Thanks for your reply.

It looks like I should go into components/ant/ant_key_manager/config/ant_key_manager_config.h and change the empty {0, 0, 0, 0, 0, 0, 0, 0} network key with the one I got from the ANT website.

So if I'm able to successfully pair with my Garmin device, does that mean the power and rpm values I see printed over UART should reflect what I'm seeing on my Garmin?

Thanks! ag