[IC]：AX5243
[Frequency]：225~237.6MHz
[Power]：18~27dBm
[Distance]：5.0km
[Interface]：UART
[Weight]：8.2±0.1g
[Introduction]：E31-230T27D is a 27dBm wireless transceiver module. It operates at 225-237.6MHz, provides an easy way to use. The outstanding advantages of narrow-band transmission is more concentrated power density, longer transmission distance, better anti-interference performance.
| RF Parameter | Value | Remark |
| Working frequency | 225~237.6 MHz | Default: 230MHz |
| Transmitting power | 18~27 dBm | Default: 27dBm（About 500mW） |
| Receiving sensitivity | -126 dBm | Air data rate: 1.2kbps |
| Air data rate | 1.2k~70kbps | Default: 1.2kbps |
| Test distance | 4000m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m, air data rate: 2.4kbps |
| Hardware Parameter | Value | Remark |
Size | 24 * 43 mm | Without SMA |
Antenna type | SMA-K | |
Communication interface | UART | Baud rate: 1200~115200, default: 9600 |
Package | DIP | |
Buffer | 512 bytes buffer | Automatically sub-packaging with 43 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 3.3 | 5.0 | 5.2 | V | |
| Communication level | 2.5 | 3.3 | 3.6 | V | |
| Transmitting current | 290 | 320 | 350 | mA | 27dBm（500mW） |
| Receiving current | 10 | 11 | 12 | mA | |
| Sleep current | 4 | 5 | 6 | μA | |
| Operating temperature | -40 | 20 | +85 | ℃ | |
| Operating humidity | 10 | 60 | 90 | % | |
| Storage temperature | -40 | 20 | +125 | ℃ |