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NEW! The BlueIO832-Mini and the free BlueIO mobile apps suite constitute the I-SYST BlueIO ecosystem.

This versatile Internet-of-Thing (IoT) framework enables users, from their mobile device such as a smartphone, to remotely communicate with an arbitrary physical device - referred to as a target device in this document (Fig. 1). BlueIO832-Mini and BlueIO mobile apps are considered as a data bridge and a data terminal, respectively. After connecting to the target device via a desired serial interface, BlueIO832-Mini streams the data on that physical interface to the BlueIO mobile app over Bluetooth® 5. BlueIO832-Mini provides four built-in app-configurable features of data communications with a target device:

  • Serial interface bridge : (i) Connect BlueIO832-Mini to a serial interface (UART, I2C, or SPI) of a target device. (ii) Pair BlueIO832-Mini with BlueIO mobile app on a mobile device. (iii) Configure the serial interface setting in BlueIO mobile app. (iv) Use BlueIO mobile app to remotely send and receive data on this interface.
  • GPIO functions: (i) Use BlueIO mobile app to configure pins of BlueIO832-Mini as GPIO for sending/receiving signal to/from a target device. (ii) Pair BlueIO832-Mini with BlueIO mobile app on a mobile device. (iii) Use BlueIO mobile app to send/receive signals(s) to/from the GPIO pin(s).
  • Analog-to-Digital Converter (ADC): (i) Use BlueIO832-Mini to convert (up to 2) analog signals to digital signals. (ii) Pair BlueIO832-Mini with BlueIO mobile app on a mobile device. (iii) Use BlueIO mobile app for monitoring the converted digital signals.
  • NFC tag: BlueIO832-Mini can be used as an NFC tag once a Nordic®-compatible NFC antenna is plugged into the NFC connector.

BlueIO832-Mini can be used as an IoT embedded development kit for developing the user’s own firmware by using Nordic® SDK. However, we recommend the user to use our open-source library IOsonata, which is built upon the Nordic® SDK, for faster and easier developing firmware on BlueIO832-Mini and any other Nordic® nRF52x SoC-based embedded system.




BlueIO832-Mini features


The heart of BlueIO832-Mini is the I-SYST BLYST Nano System-on-Module (SoM) built upon the Nordic® nRF52832 System on Chip (SoC), which is an ultra-low power 2.4 GHz wireless SoC. This Soc is equipped with 64 MHz ARM® Cortex®-M4F processor, 64 KB RAM, 512 KB flash memory. The SoC provides several serial interfaces such as UART, I2C, SPI and especially the Bluetooth® 5 low-energy mode. For more details of the I-SYST BLYST Nano, please refer to BLYST Nano Product page. The detail specifications of Nordic® nRF52832 SoC can be downloaded from the Nordic’s website .

  • Bluetooth® 5 low energy (BLE) mode
  • A wide range of supply voltage ranging from 1.8 to 5.5 volts [VIN]
  • Internal level shifter supporting GPIO voltage matching the supply voltage
  • 4 x pins [D1 – D4] which can be configured (via BlueIOWizard mobile app) as
    • 1 x UART
      • Baud rates up to 1000000 (1M baud)
      • Hardware flow control
      • Bit parity
    • 1 x I2C master
      • 100 kbps, 250 kbps, 400 kbps
    • 1 x SPI master
      • 125 kbps, 250 kbps, 500 kbps
      • 1 Mbps, 2 Mbps, 4 Mbps, 8 Mbps
    • 4 x GPIOs with configurable parameters:
      • Direction
      • Drive strength
      • Pull-up/pull-down resistors enabling
      • Pin sensing
  • 2 x Configurable ADC channels [ADC1 – ADC2]
    • 8/10/12-bit resolution
    • 1 differential mode
    • 2 independent channels
  • NFC antenna socket
    • Works with any Nordic®-compatible NFC antenna
  • JTAG
    • A 6-pin JTAG connector on the front side
    • An ARM® 10-pin CoreSight® JTAG connector on the back side
  • A 1.8-volt output pin [1V8]



2.4 GHz ISM

On-air datarate

2 Mbps and 1 Mbps Bluetooth LE 1 Mbps ANT

2 Mbps and 1 Mbps 2.4 GHz proprietary

Output power

Programmable: +4 to -20 dBm in 4 dB steps


-96 dBm Bluetooth LE 1 Mbps

-89 dBm Bluetooth LE 2 Mbps

-93 dBm 1 Mbps ANT

-30 dBm whisper mode


1 dB resolution

Radio current consumption with DC/DC at 3V

7.5 mA TX at +4 dBm output power

    1. mA TX at 0 dBm output power
    2. mA RX at 1 Mbps



ARM Cortex M4

Floating Point Unit



Flash 512 KB (+ cache) + 64 KB RAM Flash 256 KB (+ cache) + 32 KB RAM


32 configurable





12-bit 200 ksps


General purpose, low-power








System peripheral bus

20-channel PPI

Power supply

Automatic system power

DC/DC (1.7 V to 3.6 V), LDO (1.7 V to 3.6 V)

System current consumption DC/DC at 3V

0.3 μA – No RAM retention

1.2 uA All peripherals in IDLE mode

1.6 uA All peripherals IDLE mode (32 kHz + RTC) 20 nA per 4 KB - RAM retention



215 EEMBC CoreMark® (3.36 CoreMark/MHz)

58 CoreMark®/mA (Flash)

Package options


6 x 6 with 32 GPIOs


3.0 x 3.2 with 32 GPIOs

  • Smart Home products
  • IoT applications
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