RYLR998 UART Interface 868/915 MHz Lora Module with Antenna FCC CE NCC IC Certification

Absolutely outstanding little device So easy to use standby current sub 1mA, if I could give it bore than 5 star I would

I like the packaging. I was worried incase it got damaged but it gets delivered with a nice little case, so rest assured

All works good.

Funcionan muy bien aunque es importante resaltar que únicamente mediante un protocolo propietario, por lo que no son módulos LoRaWAN. Si esto se requiere, el módulo RYLR993 posee ambas modalidades y funcionan también de maravilla. He podido transferir datos de ida y vuelta a aproximadamente 5km

Plugged straight into my phone with an adaptor I purchased. Worked right away.

These are cool little LoRa modules, and they absolutely do work, but they need to be treated like a fragile UART modem, not a magic wireless serial pipe. I used a pair of RYLR998 boards with an ESP32-S3 on one side and an STM32 Nucleo on the other for a LoRa link validation project, eventually sending correction-like test packets and logging receive quality. Once configured properly, the modules transmitted and received reliably enough to be useful, and the AT command set is simple enough to get on the air quickly. For basic telemetry, remote sensors, hobby control links, or bring-up work, these are a solid value. The main warning is that reliability depends heavily on disciplined UART handling. Always terminate commands correctly, wait for "+OK" or "+ERR" after every command, and do not treat "+RCV" as confirmation of the previous command. "+RCV" is asynchronous receive data, and it can show up while your firmware is waiting for an AT command response. I also found that long "AT+SEND" payloads, turnaround timing, retries, and "+ERR=12" events need to be handled deliberately. This is not a high-throughput transparent serial cable, and it has limited buffering/hidden modem behavior that can make debugging annoying. That said, after I separated command responses from receive events, preserved partial lines, waited for real command responses, and stopped blasting commands blindly, the modules became useful. Good board, good price, but write your firmware like you’re talking to a picky little radio modem, because that’s exactly what you’re doing.

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