BlueIO832 Mini

A powerful, no-code, app-enabled Bluetooth data communication system based on the Nordic® nRF52832 SoC

Feb 09, 2023

Project update 4 of 8

Analog & Digital Signal Capture With BlueIO832Mini & the BlueIOSigCap Mobile App

by Hoan

BlueIO832 Mini is a powerful device that allows you to do a lot without needing to write a single line of code. Today, we will show you how to capture data from its three analog and six digital pins using the BlueIOSigCap mobile app. This data will be sent to the app in real time for visualization and storage.

Follow the instructions below and have fun with your device!

I. Feed Analog & Digital Signals to BlueIO832Mini

You will need to send analog and digital signals to BlueIO832Mini, as shown in Fig. 1 below.

Fig. 1. Analog signals are fed to pins A0 - A2 and digital signals are fed to pins D0 – D5 of BlueIO832Mini

II. Download & Install the BlueIOSigCap App on Your Mobile Phone

You can scan the following QR codes to download BlueIOSigCap from the Apple App Store and install it on your iPhone.

QR code for BlueIOSigCap on iOS

Note: The Android version of BlueIOSigCap will be available soon!

III. Use BlueIOSigCap with BlueIO832 Mini to Capture Signals

Step 1: Turn on the Bluetooth feature in the user’s mobile device.

Step 2: Open BlueIOSigCap on the user’s smartphone. The main user interface is shown in Fig. 2.

Fig. 2. Main user interface of BlueIOSigCap.

You will use this interface to pair the app with your BlueIO832 Mini by following three steps:

  1. Tap "SCAN" to search for BlueIO832 Mini.
  2. If there exists multiple BlueIO832 Mini(s), you can tap "Select device" and scroll through a list to choose your preferred device.
  3. Tap "Connect” for pairing the app with the selected BlueIO832Mini.

Step 3: After the app is paired with your BlueIO832Mini, just tap one of the drop-down menus ("Digital" or "Analog") and select channels as shown in Fig. 3 below.

Fig. 3. Digital channel selection (left) and Analog channel selection (right)

Step 4: Once your captured data has been displayed, as shown in Fig. 4 below, you will have the option to save it on your phone by tapping "Record" so you can share it with others via email, messenger, etc.

Fig. 4. Captured data displayed on BlueIOSigCap

Step 5: To stop capturing data, simply un-check all of the selected channels in the "Digital" and "Analog" drop-down menus.

Step 6: To unpair the app from your BlueIO832 Mini, you can tap "Disconnect." (Note that you must un-check all selected analog and digital channels before doing so.)

IV. Configure BlueIOSigCap Settings

To specify your sample rate and configure analog capture, tap "Setting" as shown in Fig. 5 below.

Fig. 5. Settings menu to specify sample-rate and analog configuration
  1. The "Sample rate" input field allows you to adjust the sample rate for both analog and digital sources.
  2. Analog capture mode (single-ended/differential), positive pins, and negative pins are configurable in the app.
  3. Tap "Update" to apply the new configuration to your BlueIO832 Mini.
  4. Tap the left arrow icon in the lower, right-hand corner to return to the main app interface.

Sign up to receive future updates for BlueIO832 Mini.

BlueIO832 Mini is part of Nordic Community Hub

Key Components

NRF52832-QFAA-R7 · Bluetooth System-on-Chip
Brain of the BlueIO832 Mini.

Subscribe to the Crowd Supply newsletter, highlighting the latest creators and projects