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CodePudding user response:

pyserial

CodePudding user response:

A serial port communication, and then using the modbus protocol, on-demand programs written host or from the machine

CodePudding user response:

Raspberry pie, RS485, measuring the pressure transmitter, pressure data is how to use the MODBUS command to read the data?

CodePudding user response:

reference m0_46243122 reply: 3/f

raspberries pie, RS485, measuring the pressure transmitter, pressure data is how to use the MODBUS command to read the data?

You all say with raspberry sent, all the way to find a serial port (485, 485, without external battery level conversion module), write a program to open a serial port, the write (according to the protocol sends a frame to read command), waiting for reply, read serial data, parsing