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This section contains information about a new product in the Node.IT family. The information may and most likely will change before the product becomes available. If you're interested in the product please get in touch with us and we will provide you with more information.



The ESPD21 module is our second controller module for the Node.IT family. Compared to the ESP210 module it is based on a more traditional micro controller and the micro controller we've used is Atmel's SAMD21. This new module have the same amazing size of 25.5mm x 17.8mm like our +One modules.

The SAMD21 is a 32-bit ARM Cortex-M0 based micro controller with up to 256KByte of Flash memory and 32KByte of SRAM and runs up to 48MHz. The high integration of this micro controller allows us to create this miniature module packed with features, performance and flexibility and full Arduino compatibility.

The ESPD21 is of course fully compatible with all available +One and WorkStation modules in the Node.IT range.

If you don't need all that 256Kbyte of FLASH memory or 32KByte of SRAM, we can supply modules with other options. Please contact us for more details.

The Board


Digital Input / Output

Just like the ESP210 this module have 11 programmable digital input/output signals. Most of those pins have many alternative functions such as UART, I2C, SPI, PWM etc which makes the module extremely usefull.

Analog Input

The ESPD21 have a separate connector (J2) that accommodates 4 extra analog input channels in addition to the original analog found on the ESP210. The A/D converter on the SAMD21 micro controller is very versatile and can accommodate many resolutions ranging from 8 to 16 bits.

Special Functions

The SAMD21 have a wide range of peripherals on the chip, and the pinout of the module allows you to simultaneously use USB, UART, I2C and SPI as well as the analog functions. The module also have an RGB LED which can be controlled using PWM allowing you to create beautiful indicator lights.

Tech Table

This is a listing of the features found on the MCU, it may necessarily not be available on the module due to how the pinout was done.

  • Processor
ARM Cortex-M0+ CPU running at up to 48MHz
Single-cycle hardware multiplier
Micro Trace Buffer (MTB)
  • Memories
32/64/128/256KB in-system self-programmable Flash
4/8/16/32KB SRAM Memory
  • System
Power-on reset (POR) and brown-out detection (BOD)
Internal and external clock options with 48MHz Digital Frequency Locked Loop (DFLL48M) and 48MHz to 96MHz Fractional
Digital Phase Locked Loop (FDPLL96M)
External Interrupt Controller (EIC)
16 external interrupts
One non-maskable interrupt
Two-pin Serial Wire Debug (SWD) programming, test and debugging interface
  • Low Power
Idle and standby sleep modes
SleepWalking peripherals
  • Peripherals
  • 12-channel Direct Memory Access Controller (DMAC)
  • 12-channel Event System
  • Up to five 16-bit Timer/Counters (TC), configurable as either:
One 16-bit TC with compare/capture channels
One 8-bit TC with compare/capture channels
One 32-bit TC with compare/capture channels, by using two TCs
  • Three 24-bit Timer/Counters for Control (TCC), with extended functions:
Up to four compare channels with optional complementary output
Generation of synchronized pulse width modulation (PWM) pattern across port pins
Deterministic fault protection, fast decay and configurable dead-time between complementary output
Dithering that increase resolution with up to 5 bit and reduce quantization error
  • 32-bit Real Time Counter (RTC) with clock/calendar function
  • Watchdog Timer (WDT)
  • CRC-32 generator
  • One full-speed (12Mbps) Universal Serial Bus (USB) 2.0 interface
Embedded host and device function
Eight endpoints
  • Up to six Serial Communication Interfaces (SERCOM), each configurable to operate as either:
USART with full-duplex and single-wire half-duplex configuration
I2C up to 3.4MHz
LIN slave
One two-channel Inter-IC Sound (I2S) interface
  • One 12-bit, 350ksps Analog-to-Digital Converter (ADC) with up to 20 channels
Differential and single-ended input
1/2x to 16x programmable gain stage
Automatic offset and gain error compensation
Oversampling and decimation in hardware to support 13-, 14-, 15- or 16-bit resolution
  • 10-bit, 350ksps Digital-to-Analog Converter (DAC)
  • Two Analog Comparators (AC) with window compare function
  • Peripheral Touch Controller (PTC)
  • 256-Channel capacitive touch and proximity sensing

Boot Loader

The board comes preloaded with a customized version of Atmel's SAM-BA bootloader that allows you to upload new firmware to the device through the USB interface. This boot loader is also fully compatible with the Arduino framework making it super easy to program the ESPD21 from the Arduino environment.


Tips, Tricks and useful links

Nothing yet