[Interface de communication]：UART
[Fréquence]： 2,4 GHz
[Protocole Bluetooth]：BLE 5.4
[Distance de communication]：200 m
[Dimensions]：10 x 10 mm
[Poids]：0,8 ± 0,1 g
[Introduction]：Le module E104-BT41SX est un module esclave Bluetooth série-bimode basé sur Bluetooth 5.4. Il prend en charge les protocoles SPP et BLE, fonctionne dans la bande de fréquence 2,4 GHz et permet de basculer entre BLE et Bluetooth classique. Sa puissance d'émission maximale est de 8 dBm et la configuration des commandes AT simplifie et accélère son utilisation. Ce module permet la transmission de données sans fil entre des périphériques série classiques d'entrée de gamme et des périphériques contrôlés par microcontrôleur. C'est un module de transmission de données économique, simple d'utilisation et fiable.
Official Store| Pin number | Pin Definition | Pin direction | Pin Function | illustrate |
| 1 | GND | - | Power ground | land |
| 2 | PA8 | - | - | Reserved interface |
| 3 | PA7 | input | RESTORE | Internal pull-up, falling edge, and then maintaining a low level for at least 5 seconds, all parameters are restored to factory settings and the module is automatically restarted. |
| 4 | PA2 | - | - | Reserved interface |
| 5 | PA1 | Output | Status Indicator | Connection status indication, high level indicates connected, low level indicates disconnected |
| 6 | PA0 | input | - | Reserved interface |
| 7 | RST | input | Reset pin | Low level reset |
| 8 | WKP(PB6) | input | Wake-up pin | The default is low level, low power mode, and all broadcasts are turned off. Pull high to input normal working mode. |
| 9 | RXD(PB5) | input | Serial Port | Serial port input pin |
| 10 | TXD(PB4) | Output | Serial Port | Serial port output pin |
| 11 | GND | input | Power ground | land |
| 12 | VCC | input | Power positive | power supply |
| 13 | VDDIO | - | - | Power supply selection pin (VBAT and VDDIO need to be short-circuited when powered by dry batteries) |
| 14 | LDOIN | - | - | Reserved pins (can be used as GPIO when powered by dry batteries) |
| 15 | PB7 | input | Mode | Low level: configuration mode; high level: transparent transmission mode; (valid only after the connection is established) |
| 16 | USB0DP | - | - | Program download interface |
| 17 | USB0DM | - | - | Program download interface |
| 18 | GND | - | Power ground | land |