The ESP8266 WiFi Serial Antenna module communicates over the 2.4 GHz ISM (Industrial Scientific and Medical) band and supports IEEE 802.11 b/g/n (the standard Wi-Fi protocols used on most home routers). The mt76813dbi esp8266 antenna talks to your microcontroller through UART (Universal Asynchronous Receiver Transmitter), a simple two-wire serial interface. You send AT commands over UART at 3.3V logic and the module handles all the Wi-Fi connection work on its own.
The mt7681 datasheet confirms the onboard PCB antenna design, meaning the radiating element is printed on the module board itself. No external antenna is needed. One non-obvious detail — the onboard PCB antenna performance drops noticeably if the module is placed inside a metallic enclosure or right next to a large copper pour. Keep it near a plastic window in the enclosure for best range. The honest limitation is the 3.3V operating voltage — connecting it to 5V GPIO pins directly will damage the module, so a level shifter (a small IC that converts between 5V and 3.3V) is required when pairing with Arduino UNO.
The esp8266 wifi antenna module connects easily with Arduino IDE, PlatformIO, and MicroPython on ESP8266-based boards. Learners building IoT dashboards, making automation projects. Connect TX and RX through a level shifter to your controller, power with 3.3V, and test with the AT command over serial monitor. StemVolt offers fast and reliable delivery of across India with trusted service support.
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Check out the NodeMCU ESP8266 CH340 wifi development board
Features:
- IEEE 802.11 b/g/n Wi-Fi standard at 2.4 GHz covers all standard home and office router bands
- UART interface at 3.3V DC allows direct connection to ESP32, STM32, and similar 3.3V boards
- Data rate up to 72 Mbps over Wi-Fi handles real-time sensor streaming and MQTT (Message Queue) publishing
- mt76813dbi wireless antenna wireless range up to 100 meters works for room-to-room IoT deployments
Technical specifications:
| Specification | Details |
|---|---|
| Module Type | MT76813DBI ESP8266 WiFi Serial Antenna |
| Operating Voltage | 3.3V DC |
| Communication Interface | UART / Serial |
| Frequency Band | 2.4 GHz ISM Band |
| WiFi Standard | IEEE 802.11 b/g/n |
| Antenna Type | Onboard PCB Antenna |
| Data Rate | Up to 72 Mbps |
| Range | Up to 100 meters |
Applications:
- Smart home switch project uses this module to turn a relay on or off over Wi-Fi
- ESP8266 WiFi Serial Antenna reads soil moisture data and pushes MQTT packets to a cloud server
- Energy monitor reads power consumption values and logs data over Wi-Fi to a local server
- mt76813dbi wifi antenna on a remote sensor node transmits temperature and humidity over 802.11n to a gateway
Package includes:
- 1 x MT76813DBI ESP8266 WiFi Serial Antenna
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