EWT201-900A30S Carte de développement pour module d'interphonie vocale sans fil, interface USB, pré-soudée EWM201-900A30S
[Interface de communication]：UART
[Fréquence]：863 MHz-928 MHz
[Puissance d’émission]：30dBm
[Boîtier]： SMD
[Distance de communication]：5 km
[Dimensions]：26.5*33mm
[Introduction]：L'EWT201-900A30S est une suite de tests développée à partir du module d'interphone audio sans fil de la série EWM201. Elle prend en charge l'alimentation Type-C, la configuration des commandes AT et une prise casque 3,5 mm. Il suffit de connecter l'antenne et de mettre l'appareil sous tension pour réaliser un test rapide.
Magasin officiel
| Serial number | name | Functional Description |
| 1 | Type-C | Type-C interface, taking into account both power supply and serial communication |
| 2 | 3.5mm headphone jack | Supports MIC input and audio output. You need to use a single-ear headset with a microphone. Ordinary 3.5mm headphones may cause the headset microphone to be unusable. |
| 3 | speaker socket | Speaker already connected |
| 4 | Onboard microphone | - |
| 5 | RX indicator | When it is always on, it is in listening mode |
| 6 | TX indicator | When it is always on, it is in the sending state |
| 7 | Reset button | Module restart and reset |
| 8 | PTT intercom button | Press once to switch the sending and receiving status |
| 9 | Antenna SMA socket | Connecting the Antenna |
| 10 | Voice intercom module | Pre-soldered EWM201-470A20S/EWM201-470A30S/EWM201-900A20S/EWM201-900A30S |
| 11 | Volume up button | Press once to increase the volume by 1, 16 levels in total |
| 12 | Volume down key | Press once to reduce the volume by 1, there are 16 levels in total |
| 13 | Mute button | Not yet supported |
| 14 | Power consumption test interface | Current test interface |
| 15 | trumpet | - |
| 16 | battery holder | 5V DC power supply, it is recommended to use battery power for better communication effect |