At the beginning, please make sure that the USB to Serial converter is connected directly to your PC and not passed through to a VM (especially if Example 1 was done before).
If not already done install PyModSlave on your Windows PC: You can download it here (in this manual version 0.4.4 is used).
Make sure the following nodes are activated in Node-Red (the serial-in/out-nodes must be deactivated):
You can enable/disable nodes as follows: Double-Click on the node -> Change Enabled / Disabled -> Click Done -> Press Deploy to apply the changes
Open the application pyModSlave -> Click the "Modbus RTU" settings-button -> Adjust the settings as in the following picture -> Press "OK"
Now switch to the "Input Registers" tab -> Click the "Connect"-button -> The connection should now be displayed as active (green circle at the bottom left) -> The numerical values of the sending array can now be adjusted as desired
The modbus-in node in Node-Red should now receive this array and output it via the debug node:
The transmission can be terminated by clicking the connect-button again.
Open the application pyModSlave -> Click the "Modbus RTU" settings-button -> Adjust the settings as in the following picture -> Press "OK"
Now switch to the "Holding Registers" tab -> Click the "Connect"-button -> The connection should now be displayed as active (green circle at the bottom left) -> Then, in node-red, the output can be triggered by clicking on the inject-node. The array "[1,2,3,4" is configured in the inject-node by default. -> In pyModSlave you can now see how the first registers has adapted
