wiring_3
Table of Contents
Wiring and Connections
Introduction
This page is for people who want to assemble this project without a PCB. The pin numbers and connections are documented below.
ESP32 "A"
This project contains 2 ESP32 modules; “A”, and “B”. This section is the wiring for “A”.
Both of your ESP32 modules should be described as the ESP32 dev kit v4 as documented here. The pin numbers on this page refer to the numbers on the devkit PCB and not the internal GPIO pins.
| ESP32 A pin | Connected To |
|---|---|
| Ground | ESP32 B ground |
| Ground | SD card ground |
| Ground | i2c (LCD) ground |
| Ground | SIM800L ground |
| pin 22 | i2c (LCD) SCL |
| pin 21 | i2c (LCD) SDA |
| pin 27 | ESP32 B pin 14 |
| pin 14 | ESP32 B pin 27 |
| 5v | ESP32 B 5v |
| 5v | SIM800L VCC (VIA DIODE) |
| 3v | GPS VCC |
| 3v | SD card VCC |
| 3v | i2c (LCD) VCC |
| pin 16 | GPS TX |
| pin 17 | GPS RX |
| pin 19 | SD card MISO |
| pin 5 | SD card CS |
| pin 18 | SD card CLK |
| pin 23 | SD card MOSI |
ESP32 "B"
This section is for the remaining ESP32 module “B”.
| ESP32 B pin | Connected To |
|---|---|
| pin 16 | SIM800L TX |
| pin 17 | SIM800L RX |
| Ground | DS18B20 Ground |
| Ground | ESP A Ground |
| pin 22 | DS18B20 (DQ) Data |
| 5v | DS18B20 Data 4k7 pullup |
| 5v | DS18B20 VCC |
| 5v | ESP32 A 5v |
| pin 27 | ESP32 A pin 14 |
| pin 14 | ESP32 A pin 27 |
wiring_3.txt · Last modified: 2023/02/18 15:34 by 127.0.0.1