E104-BT02 SMD 1mW (0dBm) wireless UART to ble module with high cost performance
[Chip solution]：DA14580
[Working frequency]： 2.379~2.496GHz
[Support protocol]： BLE 4.2
[Communication distance]：70m
[Interface type]：UART
[Product weight]：1.0±0.1g
[Introduction]：E104-BT02 is a SMD 1mW (0dBm) wireless UART to ble module with high cost performance, small size and embedded PCB antenna and operates at 2.4 GHz frequency band. Serial port (UART) can be used to receive and transmit ble data, which lowers the threshold to apply ble.
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| Pin | Name | Direction | I/O | Description |
| 1 | GND | - | Ground | Referenced ground |
| 2 | NC | - | Reserved | - |
| 3 | POO | Input | Mode configuration (MOD) | When low level is inputted, module enters configuration mode; when high level is inputted, module enters transparent transmission mode (it contains internal pull-up resistance and operates in transparent transmission mode by default) |
| 4 | P01 | - | Reserved | - |
| 5 | P02 | - | Resened | - |
| 6 | P03 | Output | X'alid data output (APP) | To indicate data outputted via serial port is valid： and the low level indicates that data is in transmission and the high level indicates that data transmission has completed (see more details on <See 5.4 Data Validity Instructions for details >) |
| 7 | P04 | Output | UART transmit data | Module outputs serial port data |
| 8 | P05 | Input | UART receive data | Module receives external serial port data |
| 9 | P06 | Output | Wake-up (WKP) | In any case： module enters wake-up mode when a low level is inputted and module enters sleep mode when a high level is inputted(it contains internal pull-up resistance and operates in sleep mode by default) |
| 10 | P07 | - | Reserved | - |
| 11 | GND | - | Ground | Referenced ground |
| 12 | VCC | - | 3.3V | Input power |
| 13 | RESET_H | Input | Reset (RST) | Module inputted a high level enters hardware reset state and module inputted a low level come back to normal operating state, which is used for restoration in emergency |
| 14 | PIO | - | Resened | - |
| 15 | Pll | Output | Connection state (STA) | To indicate connection state of Bluetooth, when connected the pin output a low level; when interrupted the pin output a high level. |
| 16 | P15 | - | Reserved | - |
| 17 | P14 | Input | Role selection | To configure the role of the module and it is a slave when a high level is inputted and it is a master when a low level is inputted. (It contains internal pull-up resistance and operates as a slave by default. See more on 5.5 Role selection) |
| 18 | P12 | - | Reserved | - |
| 19 | P13 | - | Reserved | - |
| 20 | GND | - | Ground | Referenced ground |