Botroniks Arduino codes for everyone = PCC0010: Arduino and PC communication (wired RS485) large length (up to 800m) - INFO!
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ARDUINO-side module RS485
PC-side module RS485
connections (click to enlarge)
|PCC0010: Arduino and PC communication (wired RS485) large length (up to 800m) -INFO!|
|Explanation enables: Wired communication (RS485) Arduino and PC over long distances ...|
|Required accessories: see above|
|For Arduino boards: NANO or UNO or MEGA|
|Arduino pins are used:|
|uc ATmega328p (NANO, UNO, ...): Adruino-side module RS485: D0/D1/5V/GND (unless otherwise stated in the project)|
|uc AtMega2560 (MEGA,.............): Adruino-side module RS485: D0/D1/5V/GND (unless otherwise stated in the project)|
|Electrical and practical notes:|
|Upload the code to the Arduino (in the classic way), and then connect the RS485 communication.
For long lengths, use a twisted cable
The manufacturer's instructions include a note for use up to a cable length of 800m. After that you need a signal booster!
Attention: This communication does not support all Arduino software on the net! Some time delays in communication are required. We did it here!
|How to Upload code to arduino via RS485 communication:
This communication does not perform the function of automatic reset when uploading programs in Arduino, so entering programs into Arduino is not possible in the classic way.
However - Some notes for advanced users (try, but not recommended):
The remote Arduino needs to be powered.
Before uploading the code to the Arduino, press the Arduino reset button, activate the option to upload the program in the Arduino (Xloader - Upload) and after 0,5sec. (or less)- (1 sec. is too long) release the reset button! Maybe you will succeed!
|Recommended to use an external voltage source 9V/1A (on dc plug or on VIN pin).|
|You can try communication with some of the offered codes (unless it is strictly stated that it is not RS485 communication)!|
|This way of communication is very important for serious projects where a large number of Arduino modules are connected to the same communication line and are called from the PC by using their unique password.|