ESP8266 NodeMCU, Max30100

Hello, I was testing this project (with the MAX30100 purple version) with the steps indicated and in the Cayenne it appears “Offline”.
Well on the normal Arduino it connects to wifi, but mentions :
“Initializing Pulse Oximeter FAILED”
What would you advise me to do?
Link de codigo


check your connection between your nodemcu and sensor. it is not able to detect the sensor.