RE: Azure Sphere Medical Measurement Reference Design (Part 1)

mhummel — Sat, 23 Jan 2021 04:37:30 GMT

Hi [mention:ef292582443548cc97f58584df5b81e8:e9ed411860ed4f2ba0265705b8793d05],

First of all, Thank you for the very instructive blog post!

I've run into an issue, however. I've been scratching my head wondering why my attempt at replicating this project did not work. This process seems to fall down when I run the example program. In the output window, I get successful status messages for 1) device authenticating and receiving the tenant CA cert from AS3, 2) AZURE_SPHERE_PROV_RESULT_OK, and 3) IOT_HUB_CLIENT_CONENCTION_OK. This is followed by two lines of the Device Twin reporting an HTTP Status of 204.

Once I click on User Button A, the output console keeps reporting "State: DETECT_FINGER" every few seconds. There is no Red LED flashing on the Heart Rate Click board, and the OLED keeps showing the message "HealthCare Place finger on sensor". I also checked the Dashboard for my example app in Azure IoT Central. In the Overview tab, the first three tiles keep spinning, and the larger tile on the bottom just says "Waiting for Data".

I went and purchased the MikroElectronicHerat Rate Click Board from the link that was provided at the beginning of this blog post. Upon closer inspection, this Click Board is the Heart Rate Click. It does not look exactly like the Heart Rate 4 Click that is seen in the screenshots you provided with this blog.

Heart Rate Click Heart Rate 4 Click

Could this difference account for the reason why my example app is not working? Are the two boards that much different? Is it easy to make the changes needed to get the Heart Rate Click to work in the same manner as the Click Rate 4 does in your demo? If not, it appears that I bought the wrong model. That would be very frustrating, since I followed the link that was provided in your blog to make the purchase!

Please advise on steps I should take next, and correct the link in the beginning of your blog post so others do not make the same mistake. Thank you.

- Marty Hummel ([mention:f37957c52ba3435ea086a4d3dec6b3e3:e9ed411860ed4f2ba0265705b8793d05])

RE: Azure Sphere Medical Measurement Reference Design (Part 1)

skruglewicz — Mon, 31 Aug 2020 15:51:57 GMT

Hello Brian.

What an excellent project! I must try it soon. You helped me with my project with my heart rate sensor in the "Home is where the hack is" Challenge. I've been plugging along to try and accomplish similar functionality as you are doing here.

As soon as I get some free time I'll give this a whirl and let you know how it goes.

Thanks