I'm working on talking to an EM1000 mains power meter ( the type in your meter box )
re: IR protocol to EM1000 power / electricity meter
I have the IR interface working, and also the Landis+Gyr meter management software.
My problem is reverse engineering the serial protocol with the meter. My project is to create a new tool for local meter readers, but it seems the detail of the protocol are not openly available...
I have figured out and logged a simple session, and can 'connect' to the meter, but I believe there is a challenge-response pair that I have yet to work through before I get stuck into the next challenge.
in the samples I took, I can see some clear text ( model number / serial retc ), but the bulk of message transactions are in binary, prefixed with an 0xAA byte.
These seem to work as expected with the OEM software, but without a successful 'login' from my test code, they return either an empty string, or a recurring 'message' (not logged in?)
Any thoughts, ideas or pointers greatly appreciated.