Hardware_versions
For enabling the chip in the second version, bind pin CH_PD to VCC (3.3v).
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | U0TXD | UART0 Transmit |
| 3 | GPIO2 | Has internal pull-up |
| 4 | CHIP_EN | Chip Enable, active high |
| 5 | GPIO0 | Has internal pull-up |
| 6 | EXT_RSTB | External reset signal, active low, has no pull-up? Spurious blue LED activity when attaching a DMM between GND and RST to check voltage. |
| 7 | U0RXD | UART0 Receive, has internal pull-up |
| 8 | VDD | +3.3V power input |
| Color | Name | Description |
|---|---|---|
| Red | PWR | Tied to VCC, so always on when power is applied |
| Blue | TXD | UART TX indicator, tied in hardware to U0TXD |
Starting the module bind CH_PD to VCC (3.3v) and GPIO15 to GND
