Smart Trainer and HR monitor

Jun_Li

hi,

go with the link posted from DCRainmaker

as you already told it was not for your type of trainer

you are out of luck ... sell it

happy & safe sporting

Former Member,

Well, as a matter of fact, I have been doing some hacking. I got a Adafruit board and did some programming myself so it can receive FEC and convert it to power meter profile. So it actually works for me personally.

The reason I complained here is to hope to get more to make things easier as Garmin is getting the FEC working...

Jun_Li

 problem solved 

but FE-C is working

this is limited to one headunit or trainer app, only one source can control the trainer

guess you only want power by using Garmin trainer because your smart trainer supplier does not provide power/speed ...

happy & save sporting & smart power biking

Former Member,

No, that is not the thing I was complaining. What I was complaining is that when FEC is connected to Fenix (thus I don't need my hacking device in the middle), the wrist HR sensor on the watch does not work anymore so I lost HR reading.

Jun_Li

me sorry, forgot about that 

happy & safe sporting

Jun_Li

let me guess your blanks 

wrist hr does not work when....

work meaning the green lights do not ligth up

ro

the green lights lit up but the watch does not register hr

or

while transmitting wirst hr via ANT+ the watch does not register wrist hr

or

while transmitting wrist hr via BLE the watch does not register wrist hr

or

...

take the simple setup

turn every bluetooth connections with phone(connect) and computer(trainer app) off

turn off the power sensor in the watches sensor menu (the one you use with the hack interface)

start an indoor ride free(fec) (without transmitting hr)

result is ?

...

happy & safe sporting

Former Member,

That is a good question. I will have to try it in more detail later.

What I have observed is:

I have the HR displayed on the watch in the "indoor bike" data screen as one of the fields. With my hacking power meter used, I get power reading and HR reading displayed on my watch. At the same time, I set to broadcast my HR during activity so Zwift on my computer also receives and displays HR on computer screen.

Now when I connect the FEC trainer to my watch, the HR reading on my watch display will show "--" without any number. And Zwift displays a number before the FEC trainer was connected to my watch. And when I get away from the trainer (I was playing with it from distance once), I saw the HR display on watch went back to normal when trainer disconnects, but then went wrong again when I got closer to the trainer and reconnected.

Jun_Li

thank you for the detailed setup

think the ant+ used for transmitting hr and FE-C are private channels (only a few channels are available)

• that is why I suggested to transmit hr over bluetooth instead of ant+

Jun_Li said:

watch display will show "--" without any number

• did not check the green lights ?

Jun_Li said:

Now when I connect the FEC trainer to my watch

• your interface also working ?

Jun_Li said:

And when I get away from the trainer (I was playing with it from distance once), I saw the HR display on watch went back to normal when trainer disconnects, but then went wrong again when I got closer to the trainer and reconnected.

• that sounds the story without the blanks 
• any chance scanning for ant+ (you have the knowledge because of your interface )
• with a cellphone or other scan device ?

test with transmit hr over bluetooth thingy

eventually you will figure this out

happy & safe sporting

Former Member,

I will try it later and give you more details.

In the meantime, I think I was using Bluetooth to transmit HR.

If I understood correctly, "transmitting HR during activity" only used ANT+ before some recent FW version? That was why my hacking device also receives HR over ANT+ and convert it to BLE for Zwift to use. And when I was doing the experiment without my hacking device a couple of days ago, I found out that I plugged in a BLE-USB adapter to my computer instead of an ANT-USB adapter by mistake (I have both and they look similar so it is confusing). So actually when I search for HR sensor in Zwift, I was using Bluetooth instead ANT+ as I thought I was.