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For those who want to communicate with RS232 or RS485 follows design of this backpack, open-source, a communication protocol for serial networks. The protocol is done in Qt, Arduino and PIC, any of these devices can assume the role of Master or Slave.
Remembering only:
- Network 485 only 1 master.
- Only the master has the power to initiate communication with the slave.
- The master has the power to send a packet to all (broadcast).
Example:
- Qt is in Master mode
- Arduino in slave mode
- PIC in slave mode
Licensing: LGPLv3
highlights:
- Works in Half / Full Duplex mode.
- Sending and receiving messages with confirmation.
- Send and receive messages without confirmation.
- Data reception via callback.
- Sending messages to the broadcast.
- Error handling and broken packages.
- CRC16 check Algorithm.
https://github.com/JoaoPagotto/Net485Moved from General and Desktop - p3c0
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@joaopagotto,
Thank you for sharing your work. -
HI,
I am starting with CHIP FTDI FT232R, which allows the electrical conversion between RS485 and RS232, (+ A, -B, GND) <-> USB-COM, in principle it reads 8 bit, without problems, since the converter, set autobound, parity, stop bit, etc. Then I will comment if I can in Master mode, read and write RS485 datagrams through the RS232 endpoint.
