knx stack (TP, IP and RF) for arduino and linux, Can be configured with ETS
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This projects provides a knx-device stack for arduino (ESP8266, ESP32, SAMD21, RP2040, STM32), CC1310 and linux. (more are quite easy to add) It implements most of System-B specification and can be configured with ETS. The necessary knxprod-files can be generated with my CreateKnxProd tool.

For ESP8266 and ESP32 WifiManager is used to configure wifi.

Don't forget to reset ESP8266 manually (disconnect power) after flashing. The reboot doen't work during configuration with ETS otherwise.

Generated documentation can be found here.

Stack configuration possibilities

Specify prog button GPIO other then GPIO0:

knx.buttonPin(3); // Use GPIO3 Pin

Specify a LED GPIO for programming mode other then the LED_BUILTIN:


Use a custom function instead of a LED connected to GPIO to indicate the programming mode:

#include <Arduino.h>
#include <Adafruit_NeoPixel.h>
#include <knx.h>
// create a pixel strand with 1 pixel on PIN_NEOPIXEL
Adafruit_NeoPixel pixels(1, PIN_NEOPIXEL);

void progLedOff()

void progLedOn()
  pixels.setPixelColor(0, pixels.Color(20, 0, 0));;

void main ()

More configuration options can be found in the examples.