[Solution puce]:Solution LoRa
[Fréquence de fonctionnement]:433 MHz
[Puissance d’émission]:20 dBm
[Distance de communication]: 5 km
[Dimensions]:14 x 20 mm
[Poids]:2,0 ± 0,1 g
[Introduction]:Le module sans fil EWM32M-433T20S est un module de port série sans fil (UART) ultra-compact et économique. Il utilise la technologie de communication LORA, entièrement compatible avec l'E32. Sa puissance d'émission est de 20 dBm, il offre plusieurs modes de transmission, fonctionne sur la bande de fréquence 433, dispose d'une sortie TTL et est compatible avec une tension de port d'E/S de 3,3 V. Le module à spectre étalé LoRa offre les avantages d'une distance de communication plus longue, d'une forte capacité anti-interférence et d'une confidentialité extrêmement élevée.
| 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 | input | TTL serial port input, connected to external TXD output pin; |
| 17 | M1 | input | 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 | 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 |