[Frequency]：410~441MHz
[Power]：20dBm
[Distance]：5km
[Product weight]：2.3±0.1g
[Size]：16 * 26mm
[Introduction]：E32-433T20S is a wireless serial port module (UART) based on SEMTECH's LoRa solution. It has a variety of transmission modes, working at 410MHz~441MHz, (default 433MHz), LoRa spread spectrum technology.
| Main parameter | Performance | Remark |
|---|---|---|
| Distance for reference | 5000m | Test condition：clear and open area, antenna gain: 5dBi， antenna height: 2.5m，air data rate: 2.4kbps |
| TX length | 58 Byte | Maximum capacity of single package |
| Buffer | 512 Byte | - |
| Modulation | LoRa™ | - |
| Communication interface | TTL | @3.3V |
| Package | SMD | - |
| Connector | 1.27mm | - |
| Size | 16*26mm | - |
| Antenna | IPEX/stamp hole | 50 ohm impedance |
| Main parameter | Min. | Typ. | Max. | Remark | |
|---|---|---|---|---|---|
| Operating voltage(V) | 2.3 | 5.0 | 5.5 | ≥5.0 V ensures output power | |
| Communication level(V) | - | 3.3 | - | For 5V TTL, it may be at risk of burning down | |
| Operating temperature(℃) | -40 | - | 85 | Industrial design | |
| Operating frequency(MHz) | 410 | - | 441 | Support ISM band | |
| Transmitting current(mA) | - | 110 | Instant power consumption | Instant power consumption | |
| Receiving current(mA) | - | 14 | - | - | |
| Turn-off current(μA) | - | 4 | - | Software is shut down | |
| Max Tx power(dBm) | 19.0 | - | 20.0 | - | |
| Receiving sensitivity(dBm) | -144 | -146 | -147 | Air data rate is 2.4kbps | |
| Air data rate(bps) | 2.4k | 2.4k | 19.2k | Controlled via user’s programming |
| Serial number | Pin | Pin direction | Remark |
|---|---|---|---|
| 1 | NRST | import | Module reset pin |
| 2 | GND | - | Module ground wire |
| 3 | NC | - | Empty feet |
| 4 | NC | - | Empty feet |
| 5 | NC | - | Empty feet |
| 6 | NC | - | Empty feet |
| 7 | NC | - | Empty feet |
| 8 | GND | - | Module ground wire |
| 11 | GND | - | Module ground wire |
| 12 | ANT | output | Antenna interface (high-frequency signal output, 50 ohm characteristic impedance) |
| 13 | GND | - | Module ground wire |
| 14 | GND | - | Module ground wire |
| 15 | GND | - | Module ground wire |
| 16 | GND | - | Module ground wire |
| 19 | GND | - | Module ground wire |
| 20 | M0 | Input (very weak pull-up) | With M1, determine he four working modes of the module (not suspended, if not grounded) |
| 21 | M1 | Input (very weakpull-up) | With M0, determine the four working modes of the module (not suspended, if not grounded) |
| 22 | RXD | import | TTL serial port input, connected to the external TXD output pin; |
| 23 | TXD | output | TTL, serial port output, connected to the external RXD output pin; |
| 24 | AUX | output | Used to indicate the working state of the module; user awakens external MCU and output low level during self-test initialization (can be suspended) |
| 25 | VCC | - | Module power supply is positive reference, voltage range: 2.7~5.5V DC |
| 26 | GND | - | Module ground wire |
