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 Sensor project from Miceuz. Thanks for his source code.
Quick Start
The project need install Arduino core for ESP8266 WiFi chip first.
- Install and setup Arduino IDE
- Use ESP Flasher to connect the sensor and PC. How to wire ESP Flasher and sensor? (For ESP Flasher Rev4)
- Choose board type "NodeMCU 1.0" and right com port
- Uploading
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
| Pin | Detail |
|---|---|
| D5 (GPIO14) | Clock source for soil moisture sensor |
| A0 | Output of soil moisture sensor |
| GPIO13 | LED |
| GPIO15 | SWITCH for measuring soil sensor or battery voltage |
| GPIO12 | Button S1 |
| GPIO5 | SCL for tmp112 |
| GPIO4 | SDA 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
| Pin | Detail |
|---|---|
| D5 (GPIO14) | Clock source for soil moisture sensor |
| A0 | Output of soil moisture sensor |
| GPIO12 | LED |
| GPIO2 | Output of DHT11 sensor |
| GPIO4 | Button S1 |
Sensors
Soil moisture sensor
- Max value when wet: 860
- Min value when dry: 640