In order of difficulty, the simplest communication is point-to-point, where only two devices need to communicate with each other. Next is the star topology, where there is a "master" module with which all "slave" modules communicate. In this topology, all information shared between modules must first pass through the "master" coordinating module, and direct point-to-point communication between "slave" modules is not possible. Finally, there is the most complex network, called a mesh network. This type of network is the most complex to implement on the MCU because all modules can communicate with each other; therefore, the software to be implemented is more complex than that of a star topology.
One of HopeRF's main products is the LoRa (Long Range) modules for applications requiring greater range and low power consumption. With HopeRF's LoRa modules, we can design point-to-point communication applications or design our own proprietary network without needing to connect to any external network or pay any network provider.
LoRa modulation is suitable when we need long-range RF communication with low power consumption and high interference immunity. It's a communication protocol designed to transmit small data packets, such as those used for access control, sensors, or telemetry data exchange. Therefore, it's not a suitable technology for transmitting large data packets like video or real-time calls.
One of the main features that gives HopeRF's LoRa modules greater range is their high sensitivity of up to -148dBm, which allows us to achieve longer distances without increasing power and therefore without sacrificing energy efficiency. This, combined with its patented LoRa spread spectrum modulation, can allow us to reach ranges of up to 15 km in rural environments.
HopeRF's LoRa transceiver modules are available in 433MHz, 868MHz, 915MHz, and 2.4GHz, with a power output of +20dBm (100mW) and a sensitivity of -148dBm, providing a communication link budget of 168dBm.
HopeRF also offers a LoRa module with a power amplifier that can transmit at up to 27dBm (500mW).
HopeRF is a manufacturer of ISM radio frequency modules. They offer 433MHz, 868MHz, 915MHz, and 2.4GHz modules for point-to-point communication or for creating proprietary star or mesh networks. They also offer WiFi and Bluetooth modules with integrated stacks, as well as their own RF ICs.
