[Frequency]：410~441MHz
[Power]：19~20dBm
[Distance]：3.0km
[Interface]：UART
[Product weight]：6.3±0.1g
[Introduction]：E32-433T20D is a wireless serial port module based on SEMTECH's LoRa solution (TTL level), transparent transmission mode, working in the 410-441MHz frequency band (default 433MHz), and using LoRa spread spectrum technology.
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 410~441 MHz | Default: 433MHz |
| Transmitting power | 19~20 dBm | - |
| Receiving sensitivity | -144~147 dBm | Air data rate: 2.4kbps |
| Air data rate | 2.4k~19.2kbps | - |
| Test distance | 3000 meter | In open and clear air, with maximum power, 5dBi antenna gain, height of 2.5m,air data rate: 2.4kbps |
| Hardware Parameter | Value | Remark |
|---|---|---|
| Size | 21 * 36 mm | |
| Antenna type | SMA-K | Characteristic impedance about 50Ω |
| Communication interface | UART | TTL level |
| Package | In-line | |
| Buffer | 512 bytes buffer |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 2.3 | 5.0 | 5.5 | V | ≥3.3V can guarantee output power |
| Communication level | - | 3.3 | - | V | Risk of burnout with 5V TTL |
| Transmitting current | - | 110 | - | mA | Instantaneous power consumption |
| Receiving current | - | 14 | - | mA | |
| Sleep current | - | 4 | - | μA | software shutdown |
| Pin No. | Pin Item | Pin Direction | Pin Application |
|---|---|---|---|
| 1 | M0 | input (very weak pull-up) | cooperates with M1 to determine the 4 working modes of the module. (Cannot be left floating, can be grounded if not used) |
| 2 | M1 | input (very weak pull-up) | cooperates with M0 to determine the 4 working modes of the module. (Cannot be left floating, can be grounded if not used) |
| 3 | RXD | input | TTL serial input, connect to external TXD output pin; Can be configured as open-drain or pull-up input, see parameter settings for details. |
| 4 | TXD | output | TTL serial output, connect to external RXD input pin;Can be configured as open-drain or push-pull output, see parameter settings for details. |
| 5 | AUX | outputs | Used to indicate the working status of the module; (can be left floating)The user wakes up the external MCU, and outputs a low level during the power-on self-test initialization;It can be configured as open-drain output or push-pull output, see parameter settings for details. |
| 6 | VCC | input | Positive reference of module power supply, voltage range: 2.3～5.5V DC |
| 7 | GND | Input | Module ground wire |
| 8 | Fixing | holes Fixing holes | |
| 9 | Fixing | hole Fixing hole | |
| 10 | Fixing | hole Fixing hole |
