I can only send 4 digits

[janosch1337]

hi, is this project still used by anyone?

i got it working but i can only send max 4 digits.

he send 4 digits of my message (array of byte) and after that connection lost and the username + password of the mqtt server.

my problem is i want to use a s7-315 plc. the new official siemens blocks works great on an s7-1500. so the only working blocks for s7-3xx i found were these here.

[LukasFritz]

Same

[Jansen1443]

hi janosch1337,

For an s7-400 (Step7 V5.6) I am working on getting it to communicate with MQTT. If I am correct then you already have the part in the PLC working. Could you tell me how you got this done? (I already have MQTT in Tia Portal working on several PLCs but I can't get it working in Step7 V5.6.)

Greetings and thanks in advance.