[Solution de puce]:LoRa
[Fréquence de fonctionnement]:850,125-930,125 MHz
[Puissance d’émission]:22 dBm
[Portée de communication]:5 km
[Dimensions]: 14 x 20 mm
[Poids]:1,95 ± 0,05 g
[Introduction]:L'EWM22M-900T22S est un module de port série sans fil (UART) ultra-compact et économique, doté de plusieurs modes de transmission. Il utilise la technologie de communication LoRa, entièrement compatible avec l'E22. Sa puissance d'émission maximale est de 22 dBm et fonctionne dans la bande de fréquences 900 MHz. Il utilise la technologie d'étalement de spectre LoRa, une sortie de niveau TTL et est compatible avec une tension de port d'E/S de 3,3 V. Ce module LoRa offre des débits plus élevés, une consommation énergétique réduite et un encombrement réduit. Des services de développement sur mesure sont disponibles.
| 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; leave it unconnected if not used. |
| 6 | RX_EN | Output | Used with TX_EN to control external PA; leave it unconnected if not used. |
| 7 | CLK | - | SWCLK Clock pin when program is loaded (suspended, user does not need to connect) |
| 8 | PART | - | SWDIO data pin when the program is loaded (suspended, no need to connect to the user) |
| 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 | input | TTL serial port input, connected to external TXD output pin; |
| 17 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 18 | M0 | Input (very weak pull-up) | 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 | input | 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 |