For others who are to lazy to link follow the linked article from the original article, there is a section of code in the function "loop" (modified for readabil

For others who are to lazy to link follow the linked article from the original article, there is a section of code in the function "loop" (modified for readability): void loop () { // if clock is LOW wait until it turns to HIGH // while (digitalRead(clockpin)==HIGH) {} tempmicros=micros(); // wait for the end of the HIGH pulse // while (digitalRead(clockpin)==LOW) {} // if the HIGH pulse was longer than 500 micros // we are at the start of a new bit sequence // if ((micros()-tempmicros)>500) { decode(); //decode the bit sequence } } so it looks like the 24 bit sequence is indicated by a 500 us pause between a falling edge and a rising edge of the data stream. [1] https://sites.google.com/site/marthalprojects/home/arduino/arduino-reads-digital-caliper https://sites.google.com/site/marthalprojects/home/arduino/a...