I would like to know if this is possible.
I am using an ESP8266-ESP01, which only has 2 digital pins. I have a project that needs 3 digital pins so I have planned to use my Arduino, so I can use more digital pins. My plan is instead of plugging the sensor in the GPIO1 of the ESP8266, I could somehow plug it in the Arduino digital pins and the data would just be transferred to the ESP8266 and be uploaded to an online cloud.
I can read the sensor data in the Arduino but I don't know how to transfer the data to the ESP8266 so the wifi module would just receive it and send it to the online cloud.
If anyone can help me to get some idea specifically on sending the data from Arduino to the ESP and receiving the data from the Arduino.