Q1: Is openwire.h compatible with ESP32, STM32, or Teensy? Yes. The library uses pure C++ and standard Arduino Streams. It works on any board supported by Arduino core (ESP32, ESP8266, SAMD, STM32). However, check the GitHub README for platform-specific notes on hardware serial buffers. Q2: Does openwire.h work with Arduino PLC IDE? Arduino PLC IDE (based on CODESYS) does not support arbitrary Arduino libraries. Use OpenWire only with standard Arduino IDE or PlatformIO. Q3: Can I use openwire.h and Wire.h together? Absolutely. OpenWire manages wired serial/RS485, while Wire.h handles I2C. They do not conflict. Q4: The library examples won’t compile – missing CRC.h? Some older versions of OpenWire rely on an external CRC library. Install CRC32 from Library Manager, or update to the latest OpenWire version which includes internal CRC. Alternative Libraries to Consider If OpenWire is overkill or not actively maintained for your board, consider these alternatives:
void setup() RS485.begin(9600); bus.attach(&RS485); // attach to hardware serial bus.setTimeout(100); // 100ms response timeout openwire.h library download arduino
void loop() {}
#include <openwire.h> // Define serial port for RS485 (use Serial1 on Mega, SoftwareSerial on Uno) #define RS485 Serial Q1: Is openwire
OpenWire is an open-source community project. Always test thoroughly in industrial environments. It works on any board supported by Arduino
OpenWire bus; // create bus instance