I borrowed a laptop (a VERY old Win95 system) and connected the serial port to the HP machine (WinXP on the hard drive and Linux Mint 8 on a LiveCD).
I ran HyperTerminal on the Win95 Laptop and configured it to: 2400 8-N-1 with no Flow Control. On the HP tower I ran miniterm.py and configured the port and sent a few characters. Here is the miniterm.py screen cut&paste: =============================================================== --- Baudrate: 2400 --- Settings: /dev/ttyS0 2400,7,N,1 --- RTS active --- DTR active --- BREAK inactive --- software flow control inactive --- hardware flow control inactive --- data escaping: raw --- linefeed: CR/LF --- CTS: inactive DSR: inactive RI: inactive CD: inactive =============================================================== Note the garbage characters that were received from the laptop HyperTerminal session. The laptop 2400 baud HyperTerminal session did not indicate any received characters. Then I changed the miniterm.py session on the HP tower to 19200 baud. Here is a cut&paste of the miniterm.py session: =============================================================== Baudrate: 19200 --- Settings: /dev/ttyS0 19200,7,N,1 --- RTS active --- DTR active --- BREAK inactive --- software flow control inactive --- hardware flow control inactive --- data escaping: raw --- linefeed: CR/LF --- CTS: inactive DSR: inactive RI: inactive CD: inactive asdfghjkqwertyuip 1234567890 This is a test. This is only a test. Do not pass "GO". Do not collect $200. =============================================================== Note the correct characters received from the 2400 baud laptop HyperTerminal session. I also rebooted the HP tower into WinXP and started HyperTerminal. The connection was made properly with characters transferred legibly in both directions at 2400 baud for both the laptop Win95 and the tower WinXP HyperTerm sessions. Obviously, we do NOT have a 2400 baud terminal communicating directly with a PySerial 19200 terminal. The 19200 baud indication from the miniterm.py (PySerial) session is in error and is actually 2400 baud. Blessings in abundance, all the best, and ENJOY! Art in Carlisle PA USA -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/712257 Title: PySerial Baud Rate anomaly -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
