Expansion board for the LinkIt Smart 7688 (MT7688/OpenWrt) that adds an RJ45 Ethernet port, 3.5 mm audio jack (OMTP/CTIA), USB-A host port, and three Grove connectors (2× UART, 1× I2C). Version 2 improves audio recording support over the original breakout.
| Pin | Type |
|---|---|
| 5V | Power |
| GND | Ground |
| UART1 TX | Signal |
| UART1 RX | Signal |
| UART2 TX | Signal |
| UART2 RX | Signal |
| SDA | I2C |
| SCL | I2C |
Ethernet · UART · SPI · Shield
Confirm the data interface matches your host board.
Module pins: 5V, GND, UART1 TX, UART1 RX, UART2 TX, UART2 RX, SDA, SCL. Schematik maps them to your board in the app.
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