Baud rate on Raspberry Pi /dev/ttyACM0 wrong on boot up.

first off, can state, don't know if arduino problem or rpi problem, posted on raspberry pi forums, cross-posting here measure.

i building cricket scoreboard, rpi sends signal via usb arduino webpage input, have arduino ide installed on rpi , when power reset everything, baud rate of /dev/ttyacm0 gets reset 9600 baud, i've read says default baud rate should 115,200, sketch on arduino has serial.begin(115200); in setup, should override anyway i'd have thought.

soon rpi booted, following:

code: [select]

pi@scoreboard:~ $ stty -f /dev/ttyacm0
speed 9600 baud; line = 0;
-brkint -imaxbel

if open arduino ide (v2.1.0) , go straight serial monitor, get

code: [select]

pi@scoreboard:~ $ stty -f /dev/ttyacm0
speed 115200 baud; line = 0;
min = 0; time = 0;
-brkint -icrnl -imaxbel
-opost -onlcr
-isig -icanon -iexten -echo -echoe -echok -echoctl -echoke

and scoreboard work until next reboot.

i have added init_uart_baud=115200 /boot/config.txt see if helped, didn't (and stated me usb serial isn't uart, command has no effect), can else suggest happening please, , how remedy ?

thanks.

the serial.begin() affects arduino board. have set baud rate on rpi using suitable rpi command or program.

i presume have program (other serial monitor) running on rpi take data arduino. program needs set rpi baud rate. suspect relying on arduino ide set baud rate.

what program using? post code.

maybe python - arduino demo clarify.

...r

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