[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 | ℃ |
| Pin No | Pin Item | Pin Direction | Pin Application |
| 1 | M0 | Input （weak pull-up） | Work with M1& decide the four operating modes. (Floating is not allowed, can be ground) |
| 2 | M1 | Input （weak pull-up） | Work with M0 & decide the four operating modes. (Floating is not allowed, can be ground) |
| 3 | RXD | Input | TTL UART inputs, connects to external TXD (MCU, PC) output pin. Can be configured as open-drain or pull-up input. |
| 4 | TXD | Output | TTL UART outputs, connects to external RXD (MCU,PC) input pin. Can be configured as open-drain or push-pull output |
| 5 | AUX | Output | To indicate module's working status & wakes up the external MCU. During the procedure of self-check initialization, the pin outputs low level. Can be configured as open-drain output or push-pull output. (Floating is allowed) |
| 6 | VCC | Input | Power supply 2.8V~5.5V DC |
| 7 | GND | Input | Ground |
| 8 | Fixing hole | Fixing hole | |
| 9 | Fixing hole | Fixing hole | |
| 10 | Fixing hole | Fixing hole | |
| 11 | Fixing hole | Fixing hole |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| 产品 型号 | IC | Interface | Frequency Hz | Power dBm | Distance km | Air data rate | Package | Size (mm) | Feature | 技术 手册 | 样品 购买 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E31-400M17S | SPI | AX5243 | 433M | 17 | 2 | 0.1k~125k | SMD | 14 * 20 | - | ||
| E31-433T30S | UART | AX5243 | 433M | 30 | 8.6 | 1.2k~70k | SMD | 25*40.5 | Narrow-band transmission,WOR | ||
| E31-433T17S3 | UART | AX5243 | 433M | 17 | 2.0 | 1.2k~70k | SMD | 16*26 | Narrow-band transmission,WOR | ||
| E31-DTU(230N33) | 232/485 | AX5243 | 230M | 33 | 8.0 | 1.2k~70k | Screwing/DB9 | 82*62*25 | Diffraction , WOR | ||
| E31-DTU(230N37) | 232/485 | AX5243 | 230M | 37 | 15 | 1.2k~70k | Screwing/DB9 | 124*105*25 | Diffraction , WOR | ||
| E31-230T33D | UART | AX5243 | 230M | 33 | 8.0 | 1.2k~70k | DIP | 37*60 | Diffraction , WOR | ||
| E31-DTU(230N17) | 232/485 | AX5243 | 230M | 17 | 2.0 | 1.2k~70k | Screwing/DB9 | 82*62*25 | Diffraction , WOR | ||
| E31-DTU(230N27) | 232/485 | AX5243 | 230M | 27 | 5.0 | 1.2k~70k | Screwing/DB9 | 82*62*25 | Diffraction , WOR | ||
| E31-230T17D | UART | AX5243 | 230M | 17 | 2.0 | 1.2k~70k | DIP | 21*36 | Diffraction , WOR | ||
| E31-230T27D | UART | AX5243 | 230M | 27 | 5.0 | 1.2k~70k | DIP | 24*43 | Diffraction , WOR | ||
| E31-433T17S | UART | AX5243 | 433M | 17 | 2.0 | 1.2k~70k | SMD | 17*30 | Narrow-band transmission | ||
| E31-433T17D | UART | AX5243 | 433M | 17 | 2.1 | 1.2k~70k | DIP | 21*36 | Narrow-band transmission | ||
| E31-433T27D | UART | AX5243 | 433M | 27 | 4.0 | 1.2k~70k | DIP | 24*43 | Narrow-band transmission | ||
| E31-433T30D | UART | AX5243 | 433M | 30 | 6.0 | 1.2k~70k | DIP | 24*43 | Narrow-band transmission | ||
| E31-433T33D | UART | AX5243 | 433M | 33 | 8.0 | 1.2k~70k | DIP | 37*60 | Narrow-band transmission |
