mqtt structures bms

Controlers:
controllerid, name
X00001, gate
X00002, folly
X00003, shed
X00004, passage
X00005, f-door

Cards:
unit_id, cardid, owner, readers[]
C00001, 6243091, martin, R00001

Readers:
readerid, name, controller, gpioD0, gpio D1, locks[]
R0001, "Gate", X0001, 11, 12, L0001, L0002
R0002, "Shed", X0003, 11, 12, L0003

Locks:
lockid, name, controller, gpio
L0001, Gate, X0001, 17
L0002, Folly, X0002, 17
L0003, Shed, X0003, 17

Buttons:
buttonid,  name, controller, gpio
I0001, Gate PTE,                X0001, 18
I0002, Gate Doorbell,           X0001, 19
I0003, Front Doorbell,          X0005, 18
I0004, Indoor Gate Release,     X0004, 18

Bells:
bellid,  name, controller,
B0001, Back corridoor

send_event_map
mapid, unit_id_sender, unit_id_reciever[]
M0001,  I0002, B0001-1
M0002,  I0003, B0001-2
M0002,  I0001, L0001
M0002,  I0004, L0001, L0002