# Description

ESP8266 based soil moisture sensor Wi-Fi enabled. Also provide ambient temperature and humidity sensor.

At the sensor's heart is an ESP8266 WiFi microcontroller clocked at 80 MHz and at 3.3V logic. This microcontroller contains a Tensilica chip core as well as a full WiFi stack. You can program the microcontroller using the Arduino IDE for an easy-to-run Internet of Things core. You can use ESP Flasher Rev4 that an upload code at a blistering 115200 baud for fast development time. It also has auto-reset so no noodling with pins and reset button pressings.

The sensor can upload sensor datas to remote server. We provided example code for uploading to thingspeak.

Senor in soil

The project is modifying of the I2C Moisture Sensoropen in new window project from Miceuz. Thanks for his source code.

# Quick Start

The project need install Arduino core for ESP8266 WiFi chip first.

Note:

  • Don't insert battery when you program the board.
  • For sensor v2.1, please remove the jumper for GPIO16 if you want to program the board.

# Hardware Rev 2.1

  • ESP-12F module x 1
  • Button x 1
  • Programming pinouts
  • Red led x 1
  • tmp112 temperature sensor (I2C) x 1
  • Soil moisture sensor x 1
  • AA Battery holder x 1
  • Pinouts compatible with ESPea
  • A jumper for wire GPIO16 to RESET
  • Measures 35mm x 157mm

# Pinouts

PinDetail
D5 (GPIO14)Clock source for soil moisture sensor
A0Output of soil moisture sensor
GPIO13LED
GPIO15SWITCH for measuring soil sensor or battery voltage
GPIO12Button S1
GPIO5SCL for tmp112
GPIO4SDA for tmp112

# Hardware Rev1

  • ESP-12F module x 1
  • Button x 1
  • Programming pinouts
  • Red led x 1
  • DHT11 temperature & humidity sensor x 1
  • Soil moisture sensor x 1
  • AA Battery holder x 1
  • Measures 35mm x 157mm

AA battery not included. Please add AA battery x 2.

# Pinouts

PinDetail
D5 (GPIO14)Clock source for soil moisture sensor
A0Output of soil moisture sensor
GPIO12LED
GPIO2Output of DHT11 sensor
GPIO4Button S1

# Sensors

Soil moisture sensor

  • Max value when wet: 860
  • Min value when dry: 640