Led should have resistor in series, i just coudnt be bothered and the led suvived.
The comunication of mach3 with arduino will be done using uart.īut you can buy USB to rs485 adapter and connect to rx tx lines and it should be basicaly the same think.Īrduino connected to PC one led but you dont need the LED (it is just indicator so i know what information should be send back from arduino) and cable so you can ground a pin on arduino. Small think about modbus Modbus is software protocol not hardware, so you can use it not only ower rs232 or rs485 but also let say uart usart.ĭoesnt matter the amount of connections the hardware protocol uses, basicaly it boils down to one comunication line for half duplpex and two for full duplex. You will end up with ability of mach3 to read input pin on arduino.īut if this will work for you then adding full modbus library for proper comunications shouldnt be any problem.
This will not use any modbus library it is just proof of working. The last image shows you the window where you can check the communication.
Even though the cost is a little higher, customers still like to select it.
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