search

rscada / libmbus

Meter-bus library and utility programs
http://www.rscada.se/libmbus
BSD 3-Clause "New" or "Revised" License
217 stars 137 forks source link

Example to assing primary address #100

Open kamaxeon opened 8 years ago

kamaxeon commented 8 years ago

Hi !

This is not a bug, this is a question. I have not enough knowledge to do it. I have been reading the protocol, but I don't know how to assign primary address using the secondary.

Somebody can help me ?

Thanks

Rico-van-Dongen commented 8 years ago

Hi kamaxeon, You can not really assign addresses, however you can select the device. After selecting the device will be available at primary address 253. after you have finished reading the device you should deselect it with a SND_NKE message to make address 253 available for the next device. Selecting and deselecting is handled by the serial-request-data function so if you follow the steps in mbus-serial-request-data.c you should be able to find what you need. Rico

lategoodbye commented 8 years ago

Hi kamaxeon, i think you refers to MBDOC48.pdf chapter 6.4.2 Writing Data to a Slave. In theory you need to select a slave via secondary address and then send SND_UD message with primary address record ( data = 253 ). Unfortunately i've never give it a try neither i don't know which M-Bus slaves support that feature.

kamaxeon commented 8 years ago

Hi again,

In this pdf, point 3.7.2 is the instruction that I need, but I don't know how to do it :-(

The M-Bus slave supports this feature, it has been tested with a windows software and works like a charm.

mape1 commented 8 years ago

Hi,

I have a need for the same type of functionality that kamaxeon requests. I want to be able to assign primary addresses using libmbus.

mpseybold commented 6 years ago

How about the example in pull request #118 ?

mpseybold commented 6 years ago

I put this 'mbus-serial-set-address.c' in /libmbus/bin/ and added it to the Makefile.am of this folder. With this, ./build.sh compiles the program.

I tested it with: Raspberry Pi B+ >> USB-Serial adapter (HL-340) >> Relay PW20 MBus Master >> Modularis MBus Slave. https://www.wehrle.de/en/metering/remote-reading/modularis-modules/

Initially, the Module comes with primary address '0'. After './mbus-serial-set-address -d -b 2400 /dev/ttyUSB0 0 9' I receive

init_slaves: debug: sending init frame 1 [2018-03-03 21:07:23] SEND (005): 10 40 FD 3D 16 init_slaves: debug: sending init frame 2 [2018-03-03 21:07:23] SEND (005): 10 40 FD 3D 16 [2018-03-03 21:07:24] SEND (012): 68 06 06 68 53 00 51 01 7A 09 28 16

And './mbus-serial-request-data -b 2400 /dev/ttyUSB0 0' times out, as expected. Whereas './mbus-serial-request-data -b 2400 /dev/ttyUSB0 9' returns the requested data.