Module Information


Model: RC-TASK2-868


ASK/OOK transmitter module with Crystal oscillator.


Vdc: 2.2 ÷ 3.6Volt

Current:  21/15mA

Frequency: 868.30MHz​

Power : 10dBm

Dimension: 20.32 x 11.43mm 

Model: RC-TFSK3-434


433.92MHz FSK Radio Transmitter Module - Standard Pinout .



Vdc: 2.4 ÷ 3.6Volt

Current: 14.5m

Frequency: 433.92MHz

Powe : 10dBm

Dimension: 20.32 x 11.43mm


Model: RC-TFSK4-434

Description :

433.92MHz FSK Transmitter Module - Standard Pinout.



Vdc: 2.4 ÷ 3.6Volt

Current: 14.5mA

Frequency: 433.92MHz

Power :  10dBm

Dimension: 30.5 x 10.3mm

Reference Schematics





Information on the LORA tecnology


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What is LoRa® modulation?


LoRa ™ (Long Range acronym) is a modulation technique devised by Semtech that guarantees long-range communications that are competitive with today's technologies. The modulation is based on spread-spectrum techniques and on the frequency variation (chirp) of the spectrum, with correction of FEC errors. LoRa® significantly improves receiver sensitivity and like other spread-spectrum modulation techniques uses the entire channel band to broadcast a signal; this makes it robust to noise and insensitive to frequency offsets caused by the use of internal oscillators in low-priced devices. LoRa ™ can demodulate signals with power up to -19.5 dB while many FSK systems (frequency shift keying) need a power of at least 8-10 dB to be correctly demodulated. LoRa modulation is the physical layer (PHY) that can be implemented on different network topologies and protocols such as Mesh, Star, 6lowPAN, etc.


What is a LoRa® gateway or concentrator?


LoRa ™ gateways or concentrators are designed to be used in star and long-range network architectures and are used in LoRaWAN ™ systems. They are multimodem and multichannel transceivers that can demodulate multiple channels simultaneously or multiple signals on the same channel, due to the properties of LoRa® modulation.

What is LoRaWAN ™?


LoRa® modulation is the physical layer (PHY), while LoRAWAN ™ is the MAC protocol that guarantees high channel capacity of the star and long range networks that the LoRa Alliance has standardized as a Low Power Wide Area Network (LPWAN). The LoRaWAN ™ protocol is optimized to use sensors with reduced battery consumption and includes different classes of end points depending on the need to favor network latency rather than battery life. It is entirely bidirectional and has been designed by security experts to ensure reliability and protection. The LoRaWAN ™ architecture has also been designed to locate and follow mobile data tracking objects, which is one of the fastest steps in the Internet of Things (IoT) applications.

SX1276 module

For LoRa® devices, what is the current transmit power that can be achieved with the antenna?


The output power from the device pin is + 20dBm but that of the antenna, after filtering and matching becomes + 19dBm + /? 0.5 dB.


Is LoRa a mesh network, a point-to-point or a star network?


LoRa modulation is the physical layer so it can be used in multiple network topologies. A mesh network increases the spatial extent of the network but reduces capacity, increases synchronization overhead and lowers battery life due to synchronization between network nodes. Thanks to the characteristics of LoRa modulation, a mesh topology is not necessary to increase the range of users, so a star network is sufficient. The LoRaWAN protocol was chosen to optimize capacity, battery life and ease of installation.

What are the differences between the SX1272 transceiver and the SX1276?


The SX1272 has three programmable LoRa bandwidths: 500 kHz, 250 kHz and 125 kHz. It covers only the 850 MHz to 1GHz band. The SX1276 has 500 kHz to 7.8 kHz bandwidths and offers slightly higher reception sensitivity. It covers the bands 150 MHz, 433 MHz and 0.85-1 GHz

SX1276 module

What are RadioControlli's LORA products?


RadioControlli produces the following modules on the Semtech tecnnology:


                                            RC-SM1276-868    868MHz version       SX1276 based

​                                            RC-SM1276-915    915MHz version       SX1276 based

                                            RC-SM1278-433    433MHz version       SX1278 based

                                            RC-LLCC68-868     868MHz  version      LLCC68 based




SX1276 module

What are the latest projects of RadioControlli ?


The following LORAWAN modules based on STMicroelectronics' STM32WLE5JC chip 

have been recently developed:


                          RC-WLE5-868          868MHz version  with UFL connector

                          RC-WLE5-868-HA   868MHz version  with Helical Antenna


Has a LoRa radio modem been developed?


Using the RC-WLE5-868 and RC-WLE5-868-HA modules as hardware, RadioControlli has developed a LoRa radio modem application that can be used with AT commands (LoRa Transparent Transmission Protocol):


                          RC-RICK-868          Radio Modem 868MHz version with UFL connector

                          RC-RICK-868-HA   Radio Modem 868MHz version with Helical Antenna



LORA Radio Modem Evualation kit

For more informations, please see the following video :

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