Difference between revisions of "EY-40"
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Latest revision as of 14:29, 21 January 2021
Connect TTL UART Serial interface to USB-TTL debugger
| PIN | Description | Pull LOW | Pull HIGH |
|---|---|---|---|
| SEL | Mode Select | AT Commands | Data Transmission Mode |
| CS | Chip Select Mode | Wakeup Mode | Sleep Mode * |
| TXD | Data TX | - | - |
| RXD | Data RX | - | - |