[Carrier frequency]：410~441MHz
[Transmission power]：37dBm
[Communication distance]： 25km
[Product size]：50*30.9mm
[Product weight]：10.8±0.1g
[Introduction]：E32-433T37S is a wireless serial port module based on SEMTECH's LoRa solution. It has a variety of transmission modes, working at 862MHz~931MHz, LoRa spread spectrum technology, and TTL output.
| Main parameters | Performance | Remark | |||
| Minimu m value | Typical value | Maximu m value | |||
| Working voltage (V) | 4.5 | 5~12v | 15 | ≥4.5V can guarantee the output power, the lower the voltage, the greater the supply current | |
| Communication level (V) | - | 3.3 | - | There may be a risk of burning when using a 5V level, and a level conversion circuit is required | |
| Working temperature (°C) | -40 | - | 85 | Industrial grade design | |
| Working frequency band (MHz) | 410 | - | 441 | Support ISM frequency band | |
| power consumption | 5V emission current (mA) | 2900 | 3100 | 3300 | Tested under 50 ohm impedance, the impedance mismatch may cause the current to be too large, please provide a power supply with at least 3.5A output when using 5V power suppl |
| 12V emission current (mA) | 900 | 1100 | 1300 | Tested under 50 ohm impedance, impedance mismatch may lead to excessive current, please provide at least 1.5A output power supply when using 12V power supply | |
| Receive current (mA) | 38 | 43 | 48 | Supply voltage：12V DC | |
| Sleep current (uA) | - | 2 | - | Software shutdow | |
| Maximum transmit power (dBm) | 36 | 37 | 38 | - | |
| Receiving sensitivity (dBm) | -126 | -128 | -130 | Air rate 2.4 kbps | |
| Air rate (bps) | 0.3k | 2.4k | 19.2k | User Programmable Control | |
| Reference distance | 25km | Clear sky, antenna gain 5dBi, antenna height 2.5 meters | |||
| Launch length | 58 Byte | The maximum capacity of a single package will be automatically divided into packages after exceeding | |||
| Cache capacity | 512 Byte | - | |||
| Modulation | LoRa | A new generation of LoRa modulation technology | |||
| Communication Interface | UART serial port | TTL level | |||
| Encapsulation | SMD | SMD | |||
| Interface | 2.54mm | - | |||
| Dimensions | 50*30.9mm | - | |||
| RF interface | IPEX/stamp hole | The characteristic impedance is about 50 ohms | |||
| Main parameters | Performance | Remark | |
| Minimum value | Maximum value | ||
| Power supply voltage（V） | 4.5 | 15 | Exceeding 15V may permanently burn the module |
| Blocking power（dBm） | - | 10 | High-power radio frequency do not communicate at close range |
| Working temperature（°C) | -40 | 85 | Industrial grade |
Note: The module must be connected to a 50 ohm impedance antenna when sending, and sending without load may cause permanent damage to the module! ! !
| Pin number | Pin name | Pin Orientation | Remark |
| 1 | GND | Input | Module ground wire |
| 2 | GND | Input | Module ground wire |
| 3 | VCC | Input | Positive reference of module power supply, voltage range: 4.5~15V DC |
| 4 | VCC | Input | Positive reference of module power supply, voltage range: 4.5~15V DC |
| 5 | RESET | Input | Module reset pin |
| 6 | AUX | Output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during the initialization of the power-on self-test; (can be suspended) |
| 7 | TXD | Output | TTL serial port output, connected to external RXD input pin |
| 8 | RXD | Input | TTL serial port input, connected to the external TXD output pin |
| 9 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 10 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 11 | GND | Input | Module ground wire |
| 12 | GND | Input | Module ground wire |
| 13 | ANT | Output | Antenna interface (high-frequency signal output, 50 ohm characteristic impedance) |
| 14 | GND | Input | Module ground wire |
| 15 | GND | Input | Module ground wire |
| 16 | GND | Input | Module ground wire |
| 17 | GND | Input | Module ground wire |
| 18 | GND | Input | Module ground wire |
| 19 | GND | Input | Module ground wire |
| 20 | STATE | Output | Module status indication output, if it is not used, it can be handled in the air |
| 21 | 485-EN | Input/Output | The enable control pin of the external 485 chip can be suspended if it is not used |
| 22 | NC | - | Don't worry, just leave it in the air |
| 23 | NC | - | Don't worry, just leave it in the air |
| 24 | NC | - | Don't worry, just leave it in the air |
| 25 | NC | - | Don't worry, just leave it in the air |
| 26 | SWDIO | - | Don't worry, just leave it in the air |
| 27 | GND | Input | Module ground wire |
| 28 | SWCLK | - | Don't worry, just leave it in the air |
