Thermostat

This project is originally developed for sensing the temperature and humidity in my indoor hydroponic farm. It's utilizing DHT11 temperature and humidity sensor that attached to ESP8266 wifi chip module. I don't need the pricey Arduino or Raspberry Pi for this kind of project.

note: You can also use DHT22 sensor for this project.

Configuration

1. Install the build toolchain for ESP8266. I won't explain it here, but you can check at esp-open-sdk's repository.
2. Copy user_config_example.h and rename it to user_config.h. You can change the wifi setting in this file.
3. Open Makefile and change the path setting of XTENSA_TOOLS_ROOT, SDK_BASE, ESPPORT, and EXTRA_INCDIR to your build toolchain installation path.
4. If you use DHT22 sensor instead of DHT11, you can change it at user_main.c line 20. Replace SENSOR_DHT11 with SENSOR_DHT22.

How to install

1. run make to build the firmware.
2. run make flash to burn the firmware into ESP8266 chip.

Wiring up your DHT sensor to ESP8266

DHT11 Pin	ESP8266 Pin
+	vcc 3.3v
out/data	GPIO 2
-	GND

To Do:

1. Don't call it IoT device if it's not connected to the internet, so I need send the data to my server by using CoAP or MQTT protocol.
2. Currently the ESP will boot only if GPIO 2 not attached to the DHT data pin at start up, then attach it later. I need to resolve this issue.

Special note

You can buy me a cup of coffee if you think this code is useful :)