simaticmeetslinux / iot2050-serial-modbusrtu-example

About This application shows two ways to exchange data via a serial port between PC (Windows/Linux) and the IOT2050. In the first example a pure serial transmission is used, while in the second example the communication protocol Modbus RTU is used additionally.

Welcome to Open Source Projects for SIMATIC products with Linux

The SIMATIC IOT2050 is an ARM based embedded Computing Platform from Siemens and part of Siemens’ comprehensive Industrial IoT offering. Click on the badges below to find more Siemens open source projects! Mostly application example for the SIMATIC IOT2050 can be found here, others will follow.

iot2050-serial-modbusrtu-example's Issues

IOT2050 Advanced serial port configuration

Hi bergmanu,

In the example, terminate resistor is turned on and setup / hold time is configured to 0x0005 for the IOT2050 Advanced serial port configuration. I have several questions regarding the configuration.

1. Normaly when the communication distance is long, we need to turn on the terminate resistor in the start and end device. But in the example, is it necessary to turn on the terminate resistor? and do we need to turn on the terminate resistor both in the IOT2050 side and end device side?

2. The default value for setup / hold time is 0xaa, why do we configure it to 0x0005, do we have any document about the configuration?

Thanks for you reply.