JIUWU5PCS RS-485 MAX485 Transceiver Chip Module TTL to RS-485 Module SCM Development Board

I had a WS2811 12V led strip that was connected to the controller about 30 ft away using sprinkler wire to transmit data. The length was too long and the signals were getting corrupted, so these modules came really handy. One was wired into the control box as the transmitter, the other into the box containing the led strip and set up as a receiver.Look for Arduino Nano TTL to RS485 and wire accordingly. No issues with signal degradation after installing a pair of these.

It's using max485 chip as expected. Received today and tested two of the 5, one as a transmitter and one as receiver. Works perfectly for me. VCC is using 5V, I am inputting 1.5MHz and scope and capture at the other side. All works as expected.MAX485 chip datasheet is saying it supports up to 2.5Mbps.I'm happy!!!

None worked. Purchased similar (identical) units from another vendor, 4 out of 5 of theirs work. Guess who I'll buy more from?

Did exactly what I needed it to, connect two Arduino boards over long serial lines to do half duplex communication. Tie the DE/RE pins together, and attach to a digitial out on the arduino. Tie the TX/RX to the arduino uart. Drive a high/low after a delay allowing bootloader to function as normal, and provide the ability to select TX/RX from within your program. Layout of VCC/GND pins could be a bit more convenient if they were not on the same header as the A/B bus.

Not much else to say. They're cheap, and they work quite well. I'd buy again.