Ai-Thinker Ra-01 SX1278 LoRa module for long range wireless communication

Information about this module is generated with the help of AI. The description may be incomplete, inaccurate, or subject to change.
The Ai-Thinker Ra-01 is a compact wireless communication module based on the Semtech SX1278. The module uses LoRa Spread Spectrum technology and is designed for long range communication with low data rates and high receiver sensitivity.

The Ra-01 is designed for operation in the approximate 410 to 525 MHz frequency range and is suitable for applications around 433 MHz. LoRa technology makes it possible to achieve long communication distances even when the received radio signal is weak.

The module provides a maximum RF output power of up to +20 dBm, corresponding to approximately 100 mW. Receiver sensitivity can reach as low as -148 dBm depending on the selected radio parameters. The combination of high output power and high receiver sensitivity provides a large theoretical link margin.

The Ra-01 communicates with a microcontroller through SPI and can be used with platforms such as Arduino, ESP8266 and ESP32. The module supports LoRa as well as several traditional digital modulation methods, making it suitable for different types of wireless communication.

LoRa parameters such as spreading factor, bandwidth and transmit power can be adjusted according to the application. A higher spreading factor can provide longer range and better sensitivity, but also results in a lower data rate and longer transmission time.

The module includes a packet engine with CRC and supports packets of up to 256 bytes. It also provides RSSI measurement, RF signal detection, automatic CAD functionality and fast AFC.

The Ra-01 features an integrated spring antenna and has a compact size of 17 x 16 x 3.2 mm. For best range, the antenna should be properly matched to the operating frequency. When operating at 433.92 MHz, an antenna tuned for 433 MHz is normally a good choice.

The specified range of up to 15 km should be regarded as a maximum reference value under favorable conditions. Actual range depends on factors such as antenna, installation, terrain, interference, data rate and selected LoRa parameters.

Facts.
Model: Ra-01
Radio chip: Semtech SX1278
Radio type: LoRa Spread Spectrum
Frequency range: approximately 410 to 525 MHz
Typical frequency: 433 MHz
Maximum RF output power: +20 dBm
Maximum RF output power: approximately 100 mW
Receiver sensitivity: down to -148 dBm
SPI communication: Half duplex
Maximum programmable bit rate: up to 300 kbps
Modulation: FSK
Modulation: GFSK
Modulation: MSK
Modulation: GMSK
Modulation: LoRa
Modulation: OOK
RSSI dynamic range: 127 dB
RF signal detection: Yes
CAD function: Automatic
AFC: Fast automatic AFC
Packet engine: Integrated
CRC: Yes
Maximum packet size: 256 bytes
Antenna: Integrated spring antenna
Interface: SPI
Supply voltage: 2.5 to 3.7 V
Typical supply voltage: 3.3 V
Operating temperature: -30 to 85 Celsius
Storage temperature: -40 to 90 Celsius
Storage relative humidity: below 90 percent
Size: 17 x 16 x 3.2 mm
Maximum stated range: up to 15 km under favorable conditions

Included.
1 pc module.

About the product.
Weight: approx 10 gram.
Contact us if you have questions at info@pchbutik.se
Article no: 3643
Remaining stock quantity can be found under the Product details tab.
In our range since: 2026-09-21Owning a 433 MHz transmitter is normally not a problem.

Transmitting on 433 MHz may require a license or may be prohibited depending on the exact frequency, power level and intended use.

Connecting a 433 MHz receiver and listening is normally not a problem.

The 433 MHz ISM band is a license free frequency range used for short range, low power radio communication. In Europe, the band extends from 433.05 MHz to 434.79 MHz, with a center frequency of 433.92 MHz, which is by far the most common frequency used by inexpensive transmitters and receivers.


For you.
Components and building materials for those who build electronics themselves experiment and develop.