KNX sniffer

• use this sketch as KNX BUS Monitor
• it allows to see all telegrams on the bus
• work in progress...

Settings

to turn off just comment out some of this lines

#define PRINT_PA_GA       //print PA and GA
#define PRINT_CRC         //CRC result
#define PRINT_LENGTH      //payload length
#define PRINT_PAYLOAD     //payload it self
#define PRINT_RAW         //raw telegram
#define PRINT_NORMAL_ONLY //print normal case only (0xBC), without repeats and so on (0xB0, 0xB4, 0xB8, 0x90, 0x94, 0x98, 0x9C)

Supported hardware KNX side

• Siemens BCU 5WG1117-2AB12 (also known as tpuart2)
• NCN5120 / NCN5121 / NCN5130
• Elmos E981.03 / E981.23 (not tested yet)

it strongly recomended to use galvanical isolator between BCU and Arduino (like ADUM1201)

Supported hardware Arduino side

• all ATmega32U4 based Arduinos (Leonardo, Micro...)
• all SAMD21G18A based Arduinos (Zero, M0...)
• Arduino MEGA2560 (not really tested yet)
• ESP32 with Arduino core
• all STM32 MCUs supported by Arduino Core STM32

ToDo

• long frame support
• maybe something else...