Product details
This custom development board is built around the ESP-12E WiFi module based on the ESP8266 SoC and is specially designed with an organized multi-port layout for professional and reliable IoT development.
The board features dedicated I2C pins (SDA/SCL), separate UART serial communication pins (TX/RX), and an independent analog input pin, ensuring clean signal routing and easier peripheral integration.
All main GPIOs are arranged on one side for convenient access, with an additional group of four GPIOs provided as a separate expansion port and one extra dedicated GPIO for flexible customization.
An improved power supply section with a stable 3.3V regulation system enhances performance by handling WiFi current spikes efficiently, reducing resets, and increasing overall system reliability. This board is ideal for embedded systems, automation projects, smart devices, and product prototyping.
Specification:
- Input Voltage: 12V
- Logic Voltage: 3.3V
- Controller: ESP-12E(ESP-8266)
- WiFi:2.4GHz
- GPIO: Multi-port arranged
- Analog Input: 1 (A0)
- I2C: Dedicated SDA & SCL
- UART: Dedicated TX & RX
- Organized GPIO layout for easy prototyping
- All main GPIOs arranged on one side port
- Module Dimension:54×12.5×83.3mm
- Weight: 24 g
1. Dedicated I2C Port
- Separate SDA and SCL pins
- Not mixed with general GPIO
- Easier connection for:
- OLED displays
- LCD I2C modules
- RTC modules
- Sensors (BMP280, MPU6050, etc.)
Benefit: No confusion in wiring. Cleaner layout. Better reliability.
2. Separate Serial Communication Port
- Dedicated TX and RX pins
- Suitable for:
- GSM modules
- GPS modules
- Serial debugging
- External microcontroller communication
Benefit: The programming port and communication port can be managed more clearly.
3. Dedicated Analog Pin
- Separate Analog (A0) access
- Supports analog sensors:
- LDR
- Gas sensors
- Soil moisture sensor
- Potentiometers
Benefit: Clean ADC routing reduces noise.
4. Organized GPIO Layout
-
- All main GPIOs are arranged on one side of the port.
- 4 GPIOs arranged as a separate expansion port
- 1 additional GPIO provided as a dedicated single port
Advantages:
- Cleaner breadboard use
- Easy modular expansion
- Professional PCB layout
- Reduced wiring mess
- Better signal organization
5. Improved Power Supply Design
This is one of the strongest improvements in your board.
Power Section Features:
-
- Stable 3.3V regulator
- Proper filtering capacitors
- Reverse polarity protection (if added)
- Noise reduction design Better current handling for WiFi spikes
ESP8266 draws high peak current (~300 mA during WiFi transmission).
Your improved power design ensures:
- No random resets
- Stable WiFi performance
- Better reliability in IoT deployment
- Reduced voltage drop issues.
Why This Board is Better Than Standard NodeMCU
| Feature | Standard NodeMCU | Your Custom ESP-12E Board |
| GPIO Layout | Mixed GPIO usage | Clearly separated and organized ports |
| Power Design | Basic power supply circuit | Improved and stable power regulation |
| Expansion | Limited expansion options | Multi-port organized layout for easy expansion |
| Application Focus | General-purpose development | Optimized for practical product and IoT use |
| Signal Routing | Shared communication pins | Dedicated I2C, UART, and Analog pins |
| Reliability | May reset during WiFi spikes | Designed to handle WiFi current peaks efficiently |
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