I'm working on a project using a T4 + RP6 + RM433.
During testing some of the components didn't switch.
e.g. TV switchs of but Amp doesn't? Programming is ok, as most of the time everything works fine. I recognized that the RM433 sometimes doesn't blink green, but red or orange? How come? The crazy thing is that i cannot simulate the problem? Problem occurs everytime in an other macro?
I control 3 devices via RS232 and 2 vis IR.

andi

I would add delays between the commands and see if that helps. If you are running macros, one macro has to have time to finish before the next one is executed, or some commands will get stepped on.

If the RM433 does not blink green when the trigger code from the remote is sent, it.s not receiving the RF signal.

Red blinking is interference, and I would try moving the RM433 to another location, where you get no red blink, and try it from there.

Also make sure you hook up the antenna BEFORE you apply power to the RM433, and make sure your T4 firmware is up to date,

T4 firmware is up to date,
what can cause interference?
an amx system and wireless internet is also in the flat?

The simplest in concept but least obvious is to move the RM433 several feet from the system equipment. This can also be pretty difficult.

Interference: the answer is "electronics" because most modern electronics uses square waves. They have very great high frequency content; when the antenna is close to that, no Part 15 rule in the world will guarantee RM 433 performance. I've seen an outdoor garden spotlight, that was buzzing, kill UHF channel 37! A Sony satellite receiver, in the same room with a Panasonic phone system and a ? ? non-RF alarm system, would not respond to its RF remotes from more than fifteen feet away. Fifty was ordinary.

So if you put an RM433 near a satellite receiver, cable box, DVD player, CD player, DVR, television, or any device actually designed to emit RF, you will very likely have interference.

Oh, yeah -- you can have interference that is constant but doesn't manifest until you send a signal. For instance, I had clients with analog video modulators on UHF channels when digital stations started broadcasting. The TVs showed just unorganized snow on channels with digital transmission, so the channel looked clear. But when you put a modulator there, the modulated signal mixed with the digital signal and the modulated signal didn't get through.