M-bus problem

[Andrea Becagli]

I tried connecting the caleffi meter to the /dev/RS485-2 port as a result i don't get the scan table and still no data

Code:

require('mbus')

mbus.init('/dev/RS485-2', 9600 ,"half")


res, err = mbus.scan(1 , 10, 1)
log(res)
log(err)
log(mbus.getdata(7))

log:

Code:

m-bus 17.05.2023 12:38:53
* table:
m-bus 17.05.2023 12:38:53
* nil
m-bus 17.05.2023 12:38:55
* arg: 1
  * nil
* arg: 2
  * string: failed to send/receive frame