Ignore Callbacks when Register is Updated by Self

[Seiko Santana]

Hi, is there a way to update register value without triggering the onSetCoil / onSetHreg?
I am trying to integrate modbus into existing working program so that it can interface with modbus, but the problem is when I use onSetCoil/onSetHreg to handle incoming requests, and have my program to update the registers to represent the current state, it fires the callbacks too, causing recursive calls or long loops.

Do you have any tips or workarounds for this kind of situation? Thanks in advance

[Alexander Emelianov]

mb.cbDisable();
mb.Hreg(REV, VALUE);
mb.cbEnable();

Or safer variant

bool saved_state = mb.cbEnable(false);
mb.Hreg(REV, VALUE);
mb.cbEnable(saved_state);

[Seiko Santana]

Is it safe to call those in a callback itself (inside an onSet)?

[Alexander Emelianov]

Sure.

[Seiko Santana]

Thanks a lot for your response and effort on the library 😀