2 Pack TTL to RS485 Adapter Module 3.3V 5V 485 to TTL Signal Single Chip Serial Port Level Converter Borad with RXD, TXD Indicator

Works great for driving differential RS485 signal from a 3.3-3.7v supply. Unlike many 485 breakouts it does not require an RSE/enable pin; Tx/Rx switching is handled onboard when data is detected on the incoming Tx TTL line, which will save you a microcontroller pin.Screw terminals are good quality. Output common (labeled Earth) is not connected to the board/chip GND, if necessary for your circuit (e.g. DMX) you can bridge the pins with a small wire or ground lift switch.I haven't found a datasheet for the board yet; since this is likely a clone of another design, it doesn't have any identification numbers or name.

It works but the 485 driver IC is not rated for 3.3V as advertised.At 3.3V it will work for some random length of time before it stops working and requires a power cycle.

Good price works as advertised.

These are work immediately on Windows 10 and Ubuntu Raspberry PI 4 linux.

I like the design of the chip. The 4 wire connector is great for development. However, one of the boards I received the board keeps losing it's power connection due to a poor solder connection.

These absolutely let me down recently. They are very prone to damage during use. Not sure if hot-plugging them is the problem, but I feel like a well-protected RS-485 transceiver should be okay with that. I had multiple ones fail.

These work great, as advertised

Not good. Outputs are really weak. Might be OK for a point-to-point connection without line termination.Output is disabled (not active) whenever input is high.