Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Pin assignment of ESP32 Wi-Fi module for proposed multi-sensor system.
| Pin No. | Pin Function | Function | Remark |
|---|---|---|---|
| 3 | GPIO36 (ADC0) | pH reading | Input only |
| 4 | GPIO39 (ADC3) | DO reading | Input only |
| 5 | GPIO34 (ADC6) | EC reading | Input only |
| 6 | GPIO35 (ADC7) | Temperature reading | Input only |
| 14 | GND | Ground | |
| 19 | 5 VDC | Power supply |
