ESP8266
common pins
| pin | setup | func | Note |
|---|---|---|---|
| U0_RXD | GPIO3 | I/O UART Rx during flash programming | |
| U0_TXD | GPIO1 | I/O UART TX during flash programming; | SPI_CS1 |
serial1 =
bootstrap
| pin | setup | func |
|---|---|---|
| RESET | pull up + cap 0.1 UF | |
| EN | pull up | |
| IO0 | pull up | |
| IO2 | pull up | on-module LED |
| GPIO15 | pull down |
Modules
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