Motivation

Experiments

• Experiment 1: Temperature measuring


1. Purpose


• We need to send data from one sensor to another one. We would like to send the Arduino sensor data to Wi-fi sensor, and send the Wi-fi time data to Arduino.


2. Method


• We use Arduino TX to send sensor data to Wi-fi RX, then upload data to database. And we use Wi-fi TX to send time data to Arduino RX, then print it on LCD.


3. Precaution


• Because we only can send data by byte, so we need to separate the data into one by one. For instance, 25 may be send by 2 and 5. Then merge it on another sensor. For instance, 2 and 5 may merge by 2*10+5=25.


4. Result


• We send an array which is 25、26、27 from Arduino to Wi-fi sensor. And we let the Wi-fi sensor Serial to print the data read by byte. Then we merge the data to what it should be originally.



• Materials used


1. Arduino UNO
2. Wi-fi sensor (NodeMcu)
3. Arduino Code

Wiring