The Blinds Actuator Node is actuator node for NEMA17 style steppers used in 3D printers. The board based on The Button Size Node with HopeRF RFM69-HCW radio on board and Pololu DRV8824/5 Stepper driver microcontroller (EBAN-DRV8824-5)

Best suitable for automating blinds. easyBlindsActuatorNode.ino is the Arduino example sketch using MySensors 2.0 API. This is "work in progress" project although the code and the board are working nice. Will add some useful stuff like STL files for printing belt and pulley holders a bit later.

Specification:

• Dimensions 39mm x 90mm
• Supply voltage up to 9-25 Volts depends on the motor specs
• FTDI header for programming
• Any NEMA17 4-wire motor

• DIP components mostly used, suitable for DIY

  Button Size Node Onboard sensors and features:

• Temperature and humidity sensor Si7021
• High Accuracy Temperature Sensor ±0.4 °C (max), –10 to 85 °C
• Precision Relative Humidity Sensor ± 3% RH (max), 0–80% RH
• Light sensor BH1750, spectral responsibility is approximately human eye response.
• Authentication security - Atmel ATSHA204A Crypto Authentication Chip
• External JDEC EPROM
• Dualoptiboot bootloader. Implements over the air (OTA) firmware update ability
• RFM69-HCW (high power version) or CW (low power consumption version) 433 MHz Radio transceiver
• The Digital and Analog pins are 3.3 volts

The board schematics Pdf link