no RF input/output on nRF51-DK with s210 Examples

[Andreas]

I am not able to connect Garmin Edge or SimulANT to nRF51-DK. Neither sensor nor receiver seems to work. Just looks like there is no RF.

Examples tried:

1. power_only_sensor

2. hrm_tx

3. hrm_rx

Preparations (...to be confirmed):

1. programmed softdevice s210_nrf51422_4.0.1_softdevice.hex to nRF51-DK

2. copied and opened example with Keil

3. compiled project -> ok

4. started debug session and verified that it is running in main loop -> seems ok

Is there anything that I missed during preparations here?

Is it required to setup ANT device IDs or any other settings before?

Will given examples be compatible to most "of the shelve" devices without modifications?

Thanks for any hint in advance.

[Petter Myhre]

I haven't worked with either Garmin Edge or SimulANT before, but I just tested SimulANT.

I tested with hrm_tx in the ant_hrm folder.

To get it working you need to change two things in the hrm_tx project:

the message period from #define HRMTX_MSG_PERIOD 0x1F86u to #define HRMTX_MSG_PERIOD 0x2000u

and

the network key from #define HRMTX_NETWORK_KEY {0,0,0,0,0,0,0,0} to #define HRMTX_NETWORK_KEY {0xB9,0xA5,0x21,0xFB,0xBD,0x72,0xC3,0x45}

In simulANT; add a Heart Rate Display and set the following parameters:

• Channel Period FourHz
• Device Number 49
• Device Type 120
• Transmission Type 1

Now it should work. A tip, next time you feel like it is nothing happening on the air use ANTwareII to test. I feel it is easier to use and more flexible.

[Andreas]

Ok, great Peter! Thanks a lot, also RX example works on nRF51-DK now... But as I am new to ANT development, I am curious how to find these values (Network Key and message period). Background: I am developing a display unit that shall retrieve data from multiple sensors later on. Means, that my MCU will have to figure out settings in firmware on its own, just based on a device id.

[Petter Myhre]

Np. The network key is found here. The message period was found in Simulant.

[mtpurdy]

Thanks Petter!

I'm trying to find where you found that the message period needed to be changed in SimulANT (to 0x2000u). I can't see that value (or the equivalent decimal value) anywhere in SimulANT. I'm new to ANT as well, and I'd love to have a better understanding of this.

Also, where did you see that the simulANT parameters needed to be changed to:

• Device Number 49
• Device Type 120
• Transmission Type 1

Thanks very much for your help!