<![CDATA[UART communication problem]]>Hello,

I'm trying to use the UART port (grove C) on the Fire to talk to my computer. My computer use a FTDI USB-RS232 converter to generate the serial signal.
I found I can detect some signal from the fire on my computer, but Fire cannot read the signal from computer. (I used pyserial to send the signal from my computer)

I guess it's because UART is not compatible with RS232 signal but I'm not sure. Please help if you have related experience.

Thanks,

]]>https://community.m5stack.com/topic/2673/uart-communication-problemRSS for NodeWed, 29 Apr 2026 14:51:37 GMTWed, 30 Dec 2020 20:51:42 GMT60<![CDATA[Reply to UART communication problem on Thu, 31 Dec 2020 01:32:59 GMT]]>Sorry, that I don't know.

]]>https://community.m5stack.com/post/11458https://community.m5stack.com/post/11458Thu, 31 Dec 2020 01:32:59 GMT<![CDATA[Reply to UART communication problem on Thu, 31 Dec 2020 01:24:04 GMT]]>OK, I will try Grove A and B. By the way, what's the signal level of UART on Fire? I suspect it's not compatible with RS232 signal. (I see some microcontrollers need a converter to convert between TTL and RS232).

Thank you!

]]>https://community.m5stack.com/post/11457https://community.m5stack.com/post/11457Thu, 31 Dec 2020 01:24:04 GMT<![CDATA[Reply to UART communication problem on Wed, 30 Dec 2020 22:30:43 GMT]]>Can you try a different port (A or B)? Fire has PSRAM on the same pins as the signals on Port C and that can make issues.

]]>https://community.m5stack.com/post/11452https://community.m5stack.com/post/11452Wed, 30 Dec 2020 22:30:43 GMT