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Arduino Primo nRF52 ESP8266 WiFi Bluetooth Microcontroller

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  • Jameco Part no.: 2246160
  • Manufacturer: Arduino
  • Manufacturer no.: A000135
  • HTS code: 8542310000
  • No datasheet available. Please review the tabs below for product specifications.
  • Web Exclusive

Arduino Primo nRF52 ESP8266 WiFi Bluetooth Microcontroller

The Primo is the first Arduino board designed with a Nordic nRF52832 32-bit ARM processor with integrated Bluetooth Smart Low Energy (BLE) and NFC-A tag Near Field Communication (NFC), an Espressif ESP8266 for WiFi and several on board sensors and a built-in battery charger. The Arduino Primo can be connected to a computer using a micro-USB cable, or it can be powered using a battery connected via a 2-pin JST-PH connector. Having both Bluetooth and Wi-Fi connectivity on board makes it easy to start experimenting with IoT projects.


  • nRF52832 - the main Arduino microcontroller with integrated BLE and NFC
  • STM32f103 - a service microcontroller used for advanced debugging and programming of the other microcontrollers
  • ESP8266 - for Wi-Fi and related internet connectivity functions


  • 14 digital input/output pins (of which 12 can be used as PWM outputs)
  • 6 analog inputs
  • 64 MHz ceramic resonator
  • 5V input voltage
  • Micro-USB connector
  • ICSP header
  • Battery charger
  • Power consumption: 0.936 - 94.4mA
  • Infrared receiver and transmitter
  • NFC antenna
  • BLE interface
  • Buzzer
  • Two service buttons
  • LEDs
  • Reset buttons (to reset the various microcontrollers)
  • PCB size: 2.09" x 2.70"


  • Processor: ESP8266
  • Architecture: Tensilica Xtensa LX106
  • Operating Voltage: 3.3 V
  • Flash Memory: 4 MB
  • RAM: 8 MB instruction, 12 MB data
  • Clock Speed: 80 MHz
  • WiFi: 802.11 b/g/n 2.4 GHz
  • Wake up time: < 2ms

Arduino MCU

  • Microcontroller: Nordic nRF52832
  • Architecture: ARM Cortex-M4F
  • Operating Voltage: 3.3 V
  • Flash memory: 512 KB
  • SRAM: 64 KB
  • Clock Speed: 64 MHz
  • Analog I/O Pins: 6 + 1 DAC
  • DC Current per I/O Pins: 15 mA
  • Bluetooth Smart: BLE4.0: TX power up to +4dBm -96dBm sensitivity in BLE mode
  • Other features: PDM interface, AES HW enc, NFC tag

Service MCU

  • Processor: STM32F103RBT6
  • Architecture: ARM Cortex-M3
  • Operating Voltage: 2.0 to 3.6 V
  • Flash Memory: 64 KB
  • SRAM: 20 KB
  • Clock Speed: up to 72 MHz
  • Main Features: USB/Uart converter, CMSIS-DAP, GPIO expander, Board power management, IrDA

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