[Solution puce]：Solution LoRa
[Fréquence de fonctionnement]： 868/915 MHz
[Puissance d’émission]：20 dBm
[Distance de communication]： 5 km
[Dimensions]： 14 x 20 mm
[Poids]：2,0 ± 0,1 g
[Introduction]：La série EWM32M-900T20S est un module de port série sans fil (UART) ultra-compact et économique. Il utilise la technologie de communication LORA, entièrement compatible avec E32. Sa puissance d'émission est de 20 dBm, il offre plusieurs modes de transmission, fonctionne dans la bande de fréquences 868/915 MHz, dispose d'une sortie TTL et est compatible avec une tension de port d'E/S de 3,3 V. Ce module sans fil offre les avantages d'une distance de communication plus longue, d'une forte capacité anti-interférence et d'une confidentialité renforcée.
Magasin officiel| RF parameters | unit | performance | Remark | ||
| Minimum | Typical Value | Maximum | |||
| Maximum transmit power | dBm | - | 20 | - | - |
| Receiving sensitivity | dBm | 123 | 124 | 125 | The air rate is 2.4kbps |
| Reference distance | M | - | 5K | - | In a clear and open environment, the antenna gain is 5dBi, the antenna height is 2.5 meters, and the air rate is 2.4kbps. |
| Working frequency band | MHz | 410 | 433 | 441 | Applicable to EWM32M-433T20S. |
| MHz | 862 | 900 | 930 | Applicable to EWM32M-900T20S . | |
| Air speed | bps | 2.4K | 2.4K | 19.2K | User programmable control |
| Blocking power | dBm | - | -10 | - | The probability of burning is lower when used at close range |
| Electrical parameters | unit | parameter | Remark | |
| Operating voltage | In | 2.7～5.5 | ≥ 3.3V can guarantee output power , typical value is 5V , exceeding 5.5V will permanently burn the module. | |
| Communication level | In | 3.3V | Using 5V TTL may burn out | |
| Power consumption | Emission current | m.a. | 110 | Instantaneous power consumption @22dBm |
| Receiving current | m.a. | 8 | ||
| Sleep current | a | 3 | Software shutdown | |
| Operating temperature | ℃ | -40～+85 | Industrial-grade design | |
| Hardware Parameters | Numeric | Remark |
| Modulation | LoRa | New generation LoRa modulation technology |
| Interface | 1.27mm stamp hole | - |
| Communication interface | UART Serial Port | TTL level |
| Launch length | 58 Btye | Maximum capacity of a single package, automatically split into packages after exceeding |
| Packaging | SMD | - |
| Cache capacity | 512Btye | - |
| Antenna interface | IPEX-1/Stamp Hole | Equivalent impedance is about 50Ω |
| size | 14*20mm | ±0.2mm |
| Product Net Weight | 2.0g | ±0.1g |