Compatibility with non-standard Elektro Automatik equipment

[SengerM]

I have to control a EA-PS 5040-20 A programmable DC power supply. It uses the ModBus protocol but with some differences from the standard. I am not an expert in ModBus, in fact I don't have much prior experience, but as far as I know the 0x00 address is reserved. Well, Elekctro Automatik uses this address for the devices so everything works more or less fine except for this address. Minimalmodbus does not let me to use this address and this is ok because it is out of the standard, but at the same time this does not let me to communicate with this equipment. I have made a small modification to minimalmodbus that allows to go out of the standard and communicate with equipment from this company. Basically it allows to use a device initialized with slaveaddress = 0.

[j123b567]

Name of the parameter allow_broadcast_address is missleading. I thought that it allows to use broadcast, but it disables the broadcast feature and allows to use this address for other purposes.