Baud rate spontaneously changed
Posted: Sun Dec 16, 2018 9:37 am
Display LK202-25 Using TTL Connected to a Parallax BS2 microcontroller - baud rate set to 2400
After about four hours of operation the LK202-25 displayed random graphics and characters when the BS to sent text.
The Custom startup screen displayed correctly, but after the programmed pause the first menu sent to the LK202-25 displayed the random characters.
The problem [ re-occurred ] after
My fix : I disconnected the LK202-25 from the microcontroller and reset the baud rate to 19200 (connected jumper, powered up, powered off, remove jumper). Then I connected it to my computer running the "Display Tuner" to reset the LK202-25 baud rate to 2400.
When I reconnected the the microcontroller everything worked fine for about twenty-four hours of operation.
And then . . . . . . The problem [ re-occurred ]. Has this happened to anyone before ?
I have assembled more than twenty-five of these devices with microcontroller & LK202-25 pairing. They have all operated without problems.
Some for at least a year.
After about four hours of operation the LK202-25 displayed random graphics and characters when the BS to sent text.
The Custom startup screen displayed correctly, but after the programmed pause the first menu sent to the LK202-25 displayed the random characters.
The problem [ re-occurred ] after
My fix : I disconnected the LK202-25 from the microcontroller and reset the baud rate to 19200 (connected jumper, powered up, powered off, remove jumper). Then I connected it to my computer running the "Display Tuner" to reset the LK202-25 baud rate to 2400.
When I reconnected the the microcontroller everything worked fine for about twenty-four hours of operation.
And then . . . . . . The problem [ re-occurred ]. Has this happened to anyone before ?
I have assembled more than twenty-five of these devices with microcontroller & LK202-25 pairing. They have all operated without problems.
Some for at least a year.