Full control over the serial port with RFC 2217. It uses select, no threads, for the serial ports and the network sockets and therefore runs on POSIX systems only. Multi-port TCP/IP - serial bridge (RFC 2217)¶ This example implements a TCP/IP to serial port service that works with multiple ports at once. The only dependence is the pySerial module (also pure Python). Example code includes drivers for Eurotherm and Omega process controllers. MinimalModbus is an easy-to-use Python module for talking to instruments (slaves) from a computer (master) using the Modbus protocol, and is intended to be running on the master. (*) other possible culprits are of course electrical problems as interference or incorrect grounding. The same applies to native serial ports on a computer. For example, when the N-port is set to receive stopbits, but the serial device isn't sending it, it will get confused and set garbage data over the TCP/IP link. The module named “serial” automatically selects the appropriate backend. It provides backends for Python running on Windows, OSX, Linux, BSD (possibly any POSIX compliant system) and IronPython. This module encapsulates the access for the serial port. The ESP8266 is a low cost Serial-to-WiFi module that interfaces nicely to any.
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