[Solution de puce]:Solution LoRa
[Fréquence]:410,125 ~ 493,125 MHz
[Puissance de transmission]:22 dBm
[Distance de communication]: 5 km
[Dimensions]: 14 x 20 mm
[Poids]: 5 g
[Introduction]:EWM220M-400T22S est un module de port série sans fil LoRa (UART) de nouvelle génération. Il offre plusieurs modes de transmission, fonctionne dans la bande de fréquences 410,125-493,125 MHz (433,125 MHz par défaut), utilise la technologie LoRa à étalement de spectre, dispose d'une sortie TTL et est compatible avec les tensions de port d'E/S 3,3 V et 5 V. Ce module LoRa offre une longue distance de transmission, une vitesse élevée, une faible consommation d'énergie, un format compact et un excellent rapport qualité-prix. Il prend en charge le réveil radio, la surveillance de la porteuse, la clé de communication et d'autres fonctions, prend en charge le réglage de la longueur des sous-paquets et propose des services de développement personnalisés. Ce produit couvre une plage de fréquences ultra-large de 410-493 MHz.
| Pin number | Pin Name | Pin Direction | Pin Purpose |
| 1 | GND | - | Module ground wire |
| 2 | NC | - | Empty foot (not open for use, users do not need to care) |
| 3 | GND | - | Module ground wire |
| 4 | GND | - | Module ground wire |
| 5 | TX_EN | Output | Used with RX_EN to control external PA; left unconnected if not used |
| 6 | RX_EN | Output | Used with TX_EN to control external PA; left unconnected if not used |
| 7 | CLK | Input/Output | SWCLK Clock pin when program is loaded (suspended, user does not need to connect) |
| 8 | PART | Input/Output | SWDIO data pin when program is loaded (suspended, user does not need to connect) |
| 9 | NC | - | Empty foot (not open for use, users do not need to care) |
| 10 | NC | - | Empty foot (not open for use, users do not need to care) |
| 11 | NC | - | Empty foot (not open for use, users do not need to care) |
| 12 | NC | - | Empty foot (not open for use, users do not need to care) |
| 13 | GND | - | Module ground wire |
| 14 | VCC | - | Module power positive reference, voltage range: 2.7~5.5V DC |
| 15 | TXD | Output | TTL serial port output, connected to the external RXD output pin; |
| 16 | RXD | enter | TTL serial port input, connected to external TXD output pin; |
| 17 | M1 | enter | Cooperate with M0 to determine the 4 working modes of the module ( cannot be left floating , can be grounded if not used) |
| 18 | M0 | enter | Cooperate with M1 to determine the 4 working modes of the module ( cannot be left floating , can be grounded if not used) |
| 19 | TO | Output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during the power-on self-test initialization period; (can be left floating) |
| 20 | NC | - | Empty foot (not open for use, users do not need to care) |
| 21 | RESET | enter | Module reset pin, low level reset. |
| 22 | GND | - | Module ground wire |
| 23 | ON | - | Antenna interface (high frequency signal output, 50 ohm characteristic impedance) |
| 24 | GND | - | Module ground wire |