E104-BT40 Ebyte serial to dual-mode ble module ble 4.2 spp3.0 Classic 2.4g wireless module rf support AT command
[Frequency]：2.400~2.480GHz
[Protocol]：V4.2+V3.0 SPP
[Distance]：30m
[Size]：21*13mm
[Weight]：0.8±0.1g
[Feature]：Low power consumption，Dual-mode Bluetooth module
[Product weight]：0.8±0.1g
[Introduction]：E104-BT40 module is a serial to dual-mode ble slave module based on ble 4.2 + 3.0 version, namely low power consumption ble and classic ble SPP Profile, which can freely switch between ble and Classic ble, working at 2.4GHz.
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| Pin No. | Definition | Direction | Function | Description |
|---|---|---|---|---|
| 1 | GND | - | Power supply | Power supply reference |
| 2 | TXD | Output | Serial datatransmission | Module outputs serial data to external |
| 3 | RXD | Input | Serial datareception | Module receives external serial data |
| 4 | P02 | Output | General output IO | User can set output level |
| 5 | P03 | Output | General output IO IO | User can set output level① |
| 6 | P04 | - | - | NC |
| 7 | P05 | - | - | NC |
| 8 | P06 | - | - | NC |
| 9 | P07 | - | - | NC |
| 10 | GND | - | Power supply | Power supply reference |
| 11 | P10 | Input | General input IO | User can read IO level,internal pull-up |
| 12 | P11 | Input | General input IO | User can read IO level,internal pull-up |
| 13 | PWM2 | Output | Output PWM | User configures output PWM wave |
| 14 | PWM3 | Output | Output PWM | User configures output PWM wave② |
| 15 | P33 | - | CTS | - |
| 16 | P34 | - | RTS | - |
| 17 | VCC | - | 3.3V | Power supply input |
| 18、19 | GND | - | Power supply | Power supply reference |
| 20~22 | NC | - | - | - |
| 23 | RST | - | Reset pin | Active low level |
| 24 | STATUS | Output | State indicator LED | Bluetooth is not connected: output frequency is 1Hz square wave Bluetooth is connected: Low level |
| 25 | MODE | Input | Mode selection | Low level: configuration mode ③High level: transparent transmission mode |
| 26 | DISC | Input | Disconnection | Internal pull-up, valid on falling edge |
| 27 | LINK | Output | Connection state | Bluetooth is not connected: high level Bluetooth is connected: Low level |
| 28 | GND | - | Power supply | Power supply reference |