esp8266 Development Boards
The list of esp8266 development boards, complete with pinouts, technical specifications, datasheets and more.
Technical Specifications
🧠 Microcontroller
Microcontroller Xtensa single-core 32-bit L106
Frequency Up to
📡 Connectivity
WiFi 802.11 b/g/n (2.4 GHz)
Bluetooth -
BLE -
🔌 Interfaces
Strapping Pins
Some pins are reserved for critical functions like bootstrapping, JTAG debugging, USB communication, and flash memory operations. Misusing these pins may lead to boot failures, programming issues, USB conflicts, or disruptions in flash storage.
Critical Pin Categories:
- 🛠️ Strapping Pins: Control boot behavior and flash voltage selection
- 🔗 JTAG Debugging Pins: Required for low-level debugging
- 🔌 USB Communication Pins: Used for USB Serial/JTAG communication
- ⚡ Flash Memory & SPI Pins: Connected to SPI flash memory and PSRAM
- 📡 UART Serial Communication Pins: Used for debugging and firmware uploads
| PIN | Label | Reason | Function |
|---|