bmLogger App

Initial Setup

1. Download the App: Install bmLogger from the App Store (iOS) or Google Play Store (Android).
2. Enable Bluetooth: Ensure Bluetooth is enabled on your phone. The app requires Bluetooth Low Energy (BLE) to communicate with devices.
3. Grant Permissions: When prompted, allow the app to access:
   • Bluetooth (required for device communication)
   • Location (required for BLE scanning on Android)
   • Notifications (optional, for threshold alerts)
4. Select Language: On first launch, select your preferred language.
5. Choose Units: Navigate to Settings to select your preferred temperature units (Celsius or Fahrenheit) and pressure units (hPa, inHg, or mbar).

First Time Use

1. Open the app and navigate to the Bluetooth tab
2. The app will automatically begin scanning for nearby devices
3. Devices within range will appear in the list
4. Tap on a device to view its details and begin monitoring

Tab Bar Icons

Bluetooth Tab

Purpose: Discover and connect to BLE data logging devices

This is your starting point for finding devices. The tab displays a list of all detected devices within Bluetooth range, showing their name, signal strength, and current status.

Internet Tab

Purpose: View cloud-connected devices and remote data

Access devices and data that have been uploaded to the cloud. Requires signing in to your account.

Logs Tab

Purpose: View saved downloads and device history

Browse all previously downloaded data organized by device. Access historical graphs, statistics, and export options.

Settings Tab

Purpose: Configure app-wide preferences

Adjust temperature units, pressure units, notification preferences, and other app settings.

Account Tab

Purpose: Manage your user account

Sign up, sign in, manage your account, and control cloud synchronization settings.

Device Version Comparison

Precision Setting (v41+ only)

For the latest device versions (v41, v42, v43), you can control the display precision:

• Default: 1 decimal place (e.g., 23.5°C)
• Enhanced: 2 decimal places (e.g., 23.54°C)

How Scanning Works

The Bluetooth tab continuously scans for nearby BLE devices. When a compatible device is detected, it appears in the list with:

• Device Name: The name assigned to the device (editable)
• MAC Address: Unique identifier for the device
• Signal Strength (RSSI): Indicates connection quality
• Battery Level: Current battery percentage
• Current Reading: Latest temperature (and other readings if applicable)
• Log Count: Number of stored readings

Filter and Sort Options

Device Status Indicators

• Device detected, not connected
• Connected and ready
• Device is PIN locked (v41+ only)

Scanning Tips

1. Move Closer: If a device isn't appearing, try moving closer to it
2. Check Battery: Devices with dead batteries won't transmit
3. Remove Obstacles: Metal objects and thick walls can block Bluetooth signals
4. Wait for Updates: New devices may take 10-30 seconds to appear
5. Refresh Scan: Tap to manually restart scanning

Current Readings Display

Status Indicators

Quick Actions Menu

Starting a Download

1. Navigate to the device's Focussed view
2. Tap the Download button or use menu > "Device Download"
3. A confirmation dialog shows the number of logs to download
4. Tap Download to confirm

Download Progress

1. Connecting (Yellow): Establishing Bluetooth connection
2. Downloading X logs - Y% (Blue): Transferring data
3. Processing and Storing X logs (Green): Saving to local database

Automatic Download (v41+ devices)

Some devices support automatic downloading:

1. Go to Device Settings
2. Enable Auto-Download
3. Data will automatically download when the device connects

Graph Controls

• Zoom: Pinch to zoom in/out, or drag to select a time range
• Pan: Swipe left/right to move through time
• Reset: Double-tap to reset to full view

Time Period Selector

Graph Types by Device

Color Coding

General Settings

Logging Settings

Calibration Settings

Adjust readings to match a reference instrument. Each sensor type can be calibrated independently.

v13/v23/v27: Calibration saved locally | v41+: Calibration sent to device

Alert Thresholds

Set limits that trigger alerts when exceeded:

• Temperature High/Low
• Humidity High/Low (v23, v27, v42, v43)
• Pressure High/Low (v27, v43)
• Dew Point High/Low (v23, v27, v42, v43)

Device Controls (v41+ only)

Export via Email

1. Navigate to the download you want to export
2. Tap menu > "Export via Email"
3. Enter or confirm the email address
4. Tap "Send Email"

CSV File Format

=== EXPORT METADATA ===
Device Name: [name]
MAC Address: [address]
Device Version: [version]
Download Date: [date and time]
Logging Interval: [interval] seconds
Total Readings: [count]

=== CALIBRATION VALUES ===
Temperature Calibration: [value]°C
Humidity Calibration: [value]%
Pressure Calibration: [value] hPa

=== DATA ===
Index, Date (Device), Temperature, Humidity, Pressure, Dew Point

Account Management

Creating an Account

1. Go to the Account tab
2. Tap "Sign Up"
3. Enter your email address
4. Create a password (minimum 8 characters)
5. Tap "Create Account"
6. Check your email for a verification code
7. Enter the 6-digit code
8. Account is now active

Forgot Password

1. On the sign-in screen, tap "Forgot Password"
2. Enter your email address
3. Check email for reset code
4. Enter the code and create a new password
5. Success confirmation

Cloud Upload

1. Navigate to a device's Focussed view
2. Tap menu > "Store in Cloud"
3. If not signed in, you'll be prompted to sign in first
4. Confirm the upload
5. Data is synced to your cloud account

Cloud Status Icons

• Connected to cloud
• Not connected / offline
• Upload in progress