Wrong reading(?)

[ZeyadDP]

Hello,
I am trying to read data from a PLC, but the readings are completely wrong. For example, I had a value of 27.31482 on the PLC, but what I got was bytearray(b'A'). This is a recurring problem, with none of the values I read being read properly.
My code:

import snap7 as snap

client = snap.client.Client()
client.connect('XXX.XXX.X.X', 0, 2)


intDB = []
db = client.db_read(20)

for i in range(0, len(db)):
    causSodaC = client.db_read(20, i, 1)

    causSodaC.extend(bytearray(4 - len(causSodaC)))

    realReading = snap.util.get_real(causSodaC, 0)

    array = [realReading]
    intDB.append(array)

print(intDB)

[swamper123]

What do you expect with:

db = client.db_read(20) ? The size of the DB?
And if this is possible, is this safe/common use? @gijzelaerr

causSodaC = client.db_read(20, i, 1)
Are your single values 1 byte large?

[ZeyadDP]

1. No, I expect, and get, the entirety of the data block.
2. Hmm, this might actually be the issue! I will make sure to test it as soon as I can.

[ZeyadDP]

Thanks, it worked! The sizes of the were 4 bytes long.