RYLR896 Lora Module SX1276 UART 868MHz 915MHz Antenna at Command FCC NCC

Reliable units , work great. Used on my hobbyists projects to transmit 2miles line of sight. Note that they seem to regulate transmissions to enforce the "no more than 10% of bandwidth" by not transmitting again until 10x the last transmission length. Great for short transmissions such as text messages. Not feasible for image or video transfers !

Works great for low data rates with very good range. Make sure you do not exceed 3.6 VDC on the transmit pin and the supply voltage pin or you will damage the unit.

These little guys are great for projects that are super simple. It's all UART, so the programming is incredibly simple and easy to troubleshoot. You lose out on a lot of the advanced functionality that you see in some other LORA modules; but you gain simplicity and obfuscation. Great for personal projects, but not if you want to explore the broader LORA community.

I got 2 of these twice. The first I had to return because the boards would not see them at all. The next set I have to return because no matter what commands I give them, They give a ERROR and will not take any commands given. This shouldn't be this hard.

Code info could be better. Be sure to cross the TX (Pico) to RX (module), else you will get messages echoed and not know what is happening. Also set UART baud to 9600 (the module defaults the radio to 11500 and does not need to be changed). These are two different bauds, if you don't have the right bauds here you won't see any RX. On the Raspberry Pi Pico, running micropython, two modules work with clear communication. My Raspberry Pi 3B works, but keeps crashing due to bad data (this is probably a pyserial issue). I have yet to test the communication range.

I bought two, and also two DSD TECH SH-U09C USB to TTL Serial Adapters from Amazon. The adapters come with double female jumpers you need for connecting to the radio module. After configuring a network ID and address on each unit, I was able to successfully send data from one unit on a Raspberry PI (linux) to another unit plugged into a Mac using Python. i noticed that I needed to add a small time delay when transmitting. For an hour of work, I was quite happy with the results. All the "AT" commands are documented in the Reyax web site. I used python for sending / receiving the serial data. Receive code on Mac: import serial ser = serial.Serial("/dev/cu.usbserial-B001AS3K", 115200) while True: bs = ser.readline() print(bs) Transmit code on Linux: import serial import time ser = serial.Serial("/dev/ttyUSB0", 115200) index = 0 while index < 10: index = index +1 ser.write(bytearray("AT+SEND=1,5,HELLO\r\n",'ascii')) time.sleep(1) Don't forget to set the Network ID (must be same on each unit) and unique addresses.

Received 3, one was a replacement for a non functioning chip. Replaced into a known working circuit. Be advised to do this to avoid a whole bunch of heartache. Chip one worked great, Chip 2 dead, Chip 3 broken antenna. - Packaging I guess. Resoldered antenna on chip 3 works fine now, Was very loose and rotated freely. Chip 2, Resistor below antenna very poor joint. Reflowed and now works in the same circuit it did not before. Amazon kindly will replace, but not needed now. Watch the packaging, if arriving by itself I don't think the skinny envelopes are good enough, if arriving in a box with other stuff, should be ok. - only thing I can think of being the difference.

very good devices.