E32-400T20S-V2 Wireless serial port module LoRa spread spectrum SX1278 chip low power consumption long-distance wireless transparent transmission
[IC]：SX1278
[Frequency]：410~525MHz
[Power]：20dBm
[Distance]：5km
[Interface]：UART
[Weight]：5.5g
[Introduction]：E32-400T20S-V2 is a wireless serial port module developed for the wireless meter reading industry. The factory default is 470MHz meter reading frequency band, long packet mode (197 bytes per packet) and the module supports LoRa™ spread spectrum technology. The LoRa spread spectrum solution has the characteristics of air wake-up function (low power consumption), long communication distance, anti-interference ability and strong confidentiality. It uses industrial-grade crystal oscillators to ensure its stability and consistency, and the accuracy is less than 10ppm commonly used in the industry.
| Main parameters | performance | Remark | |
| minimum value | maximum value | ||
| Power supply voltage(V) | 0 | 5.2 | Exceeding 5.2V may permanently burn the module |
| Blocking power (dBm) | - | -10 | Do not communicate at close range with high-power radio frequency |
| Working temperature (℃) | -40 | 85 | Industrial grade |
| Main parameters | performance | Remark | |||
| minimum value | Typical value | maximum value | |||
| Working voltage v | 3.3 | 5 | 5.2 | ≥3.3V can guarantee the output power. The lower the voltage, the greater the supply current. | |
| Communication level(V) | - | 3.3 | - | Using 5V TTL risks burning out | |
| Working temperature (℃) | -40 | - | 85 | Industrial grade design | |
| Working frequency band (MHz) | 410 | - | 525 | Support ISM band | |
| achievement | Emission current (mA) | - | 106 | - | Instantaneous power consumption |
| consume | Receive current(mA) | - | 15 | - | - |
| Sleep current (uA) | - | 4 | - | Software shutdown | |
| Maximum transmit power (dBm) | 19 | 19.5 | 20 | - | |
| Receiving sensitivity (dBm) | -144 | -146 | -147 | Over-the-air rate 2.4 kbps | |
| Air rate (bps) | 0.3k | 2.4k | 19.2k | User Programmed Control | |
| Main parameters | describe | Remark |
| reference distance | 5000m | 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. |
| Subcontracting method | 197 Bty | The maximum capacity of a single package, which will be automatically subdivided if exceeded. |
| cache capacity | 512 Bty | - |
| Modulation method | LoRa™ | - |
| Communication interface | UART serial port | TTL level |
| Packaging method | SMD type | - |
| Interface mode | 1.27mm | - |
| Overall dimensions | 16 * 26mm | - |
| Antenna interface | IPEX/stamp hole | Characteristic impedance is about 50 ohms |
