Hi all, I needed some low voltage inputs and outputs for a door release button, door strike and garage opener. I found this module on Aliexpress with 4 inputs and 4 outputs, and some slightly awful documentation, but, cheap ($20ish delivered), and I've figured out the profile. Modbus profile is below: Code: { "manufacturer": "Chengdu Ebyte Electronic Technology Co. Ltd.", "description": "MA01-AXCX4040", "mapping": [ { "name": "Output 1", "bus_datatype": "bool", "type": "coil", "address": 0,"writable": 1 }, { "name": "Output 2", "bus_datatype": "bool", "type": "coil", "address": 1,"writable": 1 }, { "name": "Output 3", "bus_datatype": "bool", "type": "coil", "address": 2,"writable": 1 }, { "name": "Output 4", "bus_datatype": "bool", "type": "coil", "address": 3,"writable": 1 }, { "name": "Input 1", "bus_datatype": "bool", "type": "discreteinput", "address": 0, "writable": 0}, { "name": "Input 2", "bus_datatype": "bool", "type": "discreteinput", "address": 1, "writable": 0}, { "name": "Input 3", "bus_datatype": "bool", "type": "discreteinput", "address": 2, "writable": 0}, { "name": "Input 4", "bus_datatype": "bool", "type": "discreteinput", "address": 3, "writable": 0}, { "name": "Input 1 Trigger Count", "bus_datatype": "uint32", "datatype": "uint16", "type": "register", "address": 2527, "writable": 0}, { "name": "Input 2 Trigger Count", "bus_datatype": "uint32", "datatype": "uint16", "type": "register", "address": 2528, "writable": 0}, { "name": "Input 3 Trigger Count", "bus_datatype": "uint32", "datatype": "uint16", "type": "register", "address": 2529, "writable": 0}, { "name": "Input 4 Trigger Count", "bus_datatype": "uint32", "datatype": "uint16", "type": "register", "address": 2530, "writable": 0} ] } And some additions to my init script to get the module into the state I want: Code: -- We're going to init the modbus relay box, and set some registers require('luamodbus') mb = luamodbus.rtu() mb:open('/dev/RS485', 9600, 'N', 8, 1, 'F') mb:connect() -- Connect to the module mb:setslave(32) -- Set to pulse mode for the first 2 outputs mb:writeregisters(1400, 1,1,0,0) -- Set pulse width to 8 seconds for gate, 2 seconds for garage door mb:writeregisters(1500, 8000,2000,0,0) mb:flush() mb:close() The module's docs are here: https://www.cdebyte.com/pdf-down.aspx?id=22 You can buy it here (not an ad): https://www.aliexpress.us/item/1005003651903541.html
Incidentally, to pulse those outputs, create objects in the User Parameter application, bind them with modbus, and then set them using Code: SetUserParam('MYNET', 'Garage Opener', true) I haven't been able to set cbus levels to make them trigger. I haven't tried triggering the application from the cbus network.
