When choosing modules for long-range flights, what should we pay attention to? Does ExpressLRS offer more hope than other systems for long-haul flights? Is price performance value the main reason to choose ExpressLRS, or is it the structure that focuses on range and latency, with the power of open source code behind it?
For those interested, check out the advantages of ExpressLRS on their GitHub page: https://github.com/ExpressLRS/ExpressLRS
ExpressLRS is a modern RC system that offers most of the features FPV enthusiasts need. Tests have shown that it is possible to get tens of kilometers of range with just 100mW, which means that for most ordinary users, failsafes are almost never an issue under normal conditions. ExpressLRS is based on SX127x hardware combined with an ESP8285, ESP32, or STM32 MCU for RX and TX respectively. It uses LoRa modulation, which is also used in ImmersionRC Ghost and TBS Crossfire, which is why it has noticeably better range than systems that don’t use LoRa, such as TBS Tracer.
TBS has surrendered to ExpressLRS. According to what is said under the video, if the antenna version was used, it could go half the distance.
ExpressLRS is a protocol that is similar to Crossfire but with closed parts. In fact, both protocols seem to use LoRa, but while ExpressLRS continues to use LoRa at high Hz values, Crossfire switches to the FLRC protocol, which seriously complicates things. Additionally, ELRS modules use CRSF protocol when communicating with FC, which simplifies the connection considerably. ELRS can also be used for standard telemetry communication or radio communication.
Since GSM services use the 900 MHz band, it is more recommended to use 868MHz instead of 900 in Turkey. What is the situation in your country? You can write in the comments.
ExpressLRS is an open source radio link for radio control applications. Designed to be the best FPV racing link, it is based on the fantastic Semtech SX127x/SX1280 LoRa hardware combined with an Espressif or STM32 processor. Using LoRa modulation as well as reduced packet size, it achieves best-in-class range and latency. It achieves this using a highly optimized over-the-air packet structure, giving simultaneous range and latency advantages. It supports both 900 MHz and 2.4 GHz links, each with their own benefits. 900 MHz supports a maximum of 200 Hz packet rate, with higher penetration. 2.4 GHz supports a blistering fast 500 Hz on EdgeTX. With over 60 different hardware targets and 13 hardware manufacturers, the choice of hardware is constantly growing, with different hardware suited to different requirements.
As ExpressLRS is a complex system, it may not be suitable for everyone at first. However, over time, the modules introduced to the market have developed quite a bit. Those who are interested can find more information on the subject on the OscarLiang.com website