ADA2821 · AdafruitActive
Adafruit product #2821 — built on ESP8266.
| Part number | ADA2821 |
|---|---|
| Manufacturer | Adafruit |
| Category | Development Boards › ESP8266 Boards |
| Pins | 22 |
| Frequency | 2.4 GHz |
Adafruit Feather HUZZAH with ESP8266 - Loose Headers pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | VBAT | power | |
| 2 | EN | bidirectional | |
| 3 | VBUS | power | |
| 4 | GPIO14/SCK | bidirectional | |
| 5 | GPIO12/MISO | bidirectional | |
| 6 | GPIO13/MOSI | bidirectional | |
| 7 | GPIO15 | bidirectional | |
| 8 | GPIO0 | bidirectional | |
| 9 | GPIO16 | bidirectional | |
| 10 | GPIO2 | bidirectional | |
| 11 | GPIO5/SCL | bidirectional | |
| 12 | GPIO4/SDA | bidirectional | |
| 13 | RESET | bidirectional | |
| 14 | 3.3V | power | |
| 15 | GND | ground | |
| 16 | ADC | bidirectional | |
| 17 | GPIO14/SCK | bidirectional | |
| 18 | GPIO13/MOSI | bidirectional | |
| 19 | GPIO12/MISO | bidirectional | |
| 20 | RXD | bidirectional | |
| 21 | TXD | bidirectional | |
| 22 | CH_PD | bidirectional |
Schematic symbol and footprint
Footprint: Adafruit Feather HUZZAH ESP8266 (header pads) — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
Datasheet
Where to buy
Stock and prices from the suppliers, checked 2026-10-08; excluding tax and shipping.
