RF-42UP module is a LoRa spread spectrum module, with operating frequency of 410 MHz ~ 525 MHz, based on the Semtech SX1278. It is a wireless transceiver module with 3.3 V TTL level output.
3000 meters transmission distance SX1278 433 MHz LoRa module
RF-42UP module is a LoRa spread spectrum module, with operating frequency of 410 MHz ~ 525 MHz, based on the Semtech SX1278. It is a wireless transceiver module with 3.3 V TTL level output. RF-star LoRa module features with ultra-long range spread spectrum communication, concentrated power density, high interference immunity ability, confidentiality, and significantly lower current consumption. The communication interface of RF-42UP is UART.
Parameters of RF-42UP
Chipset | Semtech SX1278 | |
Supply Power Voltage | 3.3 V ~ 5.2 V, recommended to 5.0 V | |
UART Communication Level | 2.5 V ~ 3.6 V, typical: 3.3 V | |
Frequency | 410 MHz ~ 525 MHz, typical: 433 MHz | |
Transmit Power | +10.0 dBm ~ +20.0 dBm | |
Receiving Sensitivity | -148 dBm | |
Number of Channels | 116 | |
Default Channel | 23 (433 MHz) | |
Module Address Number | 65538 (default as 0) | |
Crystal | 32 MHz | |
Package | DIP Package | |
Dimension | 36.0 mm x 21.1 mm x (2.5 ± 0.1) mm | |
Antenna | SMA connector | |
Operating Humidity | 10% RH ~ 90% RH (no condensation) | |
Storage Humidity | 10% RH ~ 90% RH (no condensation) | |
Operating Temperature | -40 ℃～ +85 ℃ | |
Storage Temperature | -45 ℃～ +90 ℃ | |
Data Interface Rate @ 3.3 V (TTL) | 1200 bps ~ 115200 bps, typical: 9600 bps | |
Air Rate | 0.3 kbps ~ 19.2 kbps (typical: 2.4 kbps) | |
Single Package Size | 196 byte | |
Cache Size | 512 byte | |
Transmission Distance | 3000 m (Test conditions: sunny weather, empty, +20 dBm, antenna gain of 5 dBi, height of above 2.5 m, air speed of 2.4 kbps) | |
Operating Current @ 3.3 V | Tx Current | 101 mA |
Rx Current | 15 mA | |
Sleep Current | 3.4 μA | |
Recommended Footprint
Pin Attributes
Pin Functions of RF-42UP
Pin | Name | Pin Type | Description |
1 | RES_MCU | I | Reset pin, NC. |
2 | SWIM_MCU | I/O | SWIM pin of internal MCU |
3 | S0 | I | Cooperate with S1 to determine the working mode. (Cannot be NC, need be grounded if not used.) |
4 | S1 | I | Cooperate with S0 to determine the working mode. (Cannot be NC, need be grounded if not used.) |
5 | RXD | I | UART RX signal |
6 | TXD | O | UART TX signal |
7 | EN / AUX | O | Pull the serial port high before sending data and pull low after sending. Timed wake-up pin, pull high when wake-up. Pull high when module sending data, pull low after sending. |
8 | VCC | - | Power supply: 3.3 V ~ 5.2 V. |
9 | GND | - | Ground, NC. |
10 | GND | - | Ground, NC. |
11 | GND | - | Ground, NC. |
12 | GND | - | Ground, NC. |
