(1) do not use R1 and R6: just connect the GND of the MAX485s directly to 0V
(2) change R2 and R3 with much higher values from 10K to 100K
(3) why microcontroller HB5 uses TX only while HB7 controls RE/TE of the MAX485 transceiver?
Regards
Thanks for your time....
Arkham00 said:
(1) do not use R1 and R6: just connect the GND of the MAX485s directly to 0V
what would be the advantage of removing Resistors R1 and R6?...
I added these resistors to prevent excess current from flowing to GND which may introduce noise..............Or is it more than that?.....
Arkham00 said:
(2) change R2 and R3 with much higher values from 10K to 100K
These resistors were add to put a check on the floating conditions that may arises if the wire is broke..........isn't ? correct me if i am wrong.