How to power ESP8266
This guide provides step-by-step instructions on energizing the ESP8266 NodeMCU. You'll gain insights into various methods of powering the ESP8266 and its associated sensors:
- Powering the ESP8266 through the USB port
2 Powering both the ESP8266 and sensors through the USB port
- Utilizing the Vin pin to power the ESP8266
- Powering both the ESP8266 and sensors through the Vin pin
Additionally, you'll learn practical and convenient wiring techniques for seamless implementation.
Hardware Preparation
Or you can buy the following sensor kits:
| 1 | × | DIYables Sensor Kit (30 sensors/displays) | |
| 1 | × | DIYables Sensor Kit (18 sensors/displays) |
Additionally, some of these links are for products from our own brand, DIYables.
How to power ESP8266 via USB port
You can use the following power sources to power ESP8266 via USB port
- Computer and Micro USB Cable
- Phone charger (micro USB terminal)
- 5V Power Adapter (micro USB terminal)
How to power ESP8266 and sensors via USB port
The below diagram shows and example of powering ESP8266 (via USB port) and DHT22 sensor
You can power ESP8266 via USB port as above, and then get power from Vin pin to power sensors.
Please note that this way is only suitable for a few sensors with less power consumption. If you want to powers sensors with high power consumption, please see the next part
How to power ESP8266 via Vin pin
You can use the 5v power adapter with barrel jack to power ESP8266 via Vin pin. You can do so by two ways:
- Cut the wire and separate the positive and negative lines. Then connect the positive line to Vin pin and the negative line to a GND pin of ESP8266
- (Recommended) use a DC Jack connecter
How to power ESP8266 and sensors via Vin pin
The below diagram shows and example of powering ESP8266 (via Vin pin) and DHT22 sensor by a 5V power adapter
This method is strongly recommended as it ensures that the motors, sensors, displays, and other components are powered independently of the ESP8266 board, ensuring both safety and adequate power supply
How to actually do wiring easily and conveniently
In practice, we require a method for secure, tidy, safe, and convenient wiring. The optimal solution is to utilize a screw terminal board.
