ESP Temperature Sensor

A temperature and relative humidity monitoring device created with the AHT20 Temperature/Humidity Module, the ESP32 Development Board, the SSD1306 OLED Display Module, and the ESPHome Custom Firmware that can be integrated into the Home Assistant.

Features

• Temperature Monitoring
• Relative Humidity Monitoring
• With Display (Temperature and relative humidity are shown in real time)

Prerequisites

This device was built with ESPHome and is intended to work with Home Assistant.

Modules

• ESP32-S2 Mini
• AHT20 Temperature and Humidity Measurement Module
• SSD1306 OLED Display Module

Getting Started

Pictorial Diagram

❗❗❗ For ESP32-S2 Mini, use IO33 for SDA and IO35 for SCL.

AHT20 Pin	SSD1306 OLED Pin	ESP32 Pin
SDA	SDA	D21
SCL	SCL	D22
VCC	VCC	3V3
GND	GND	GND

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1. Ensure ESPhome and File Editor add-ons are installed on your Home Assistant instance.
2. Ensure that your ESPHome secrets.yaml file is up to date.
3. Using the File Editor add-ons, upload the esp-temperature-sensor.yaml config file along with materialdesignicons-webfont.ttf font file on the config/esphome/.
4. Using the ESPHome dashboard, modify the esp-temperature-sensor.yaml and replace the redacted part of the config file.
5. Build and upload the firmware to your device.
6. Now, you can integrate the device into your Home Assistant.

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Operational Device