<![CDATA[Is it possible to connect two M5Atom with a cable...]]>Hello,

Is it possible to connect two M5Atom with a cable by UART - without any additional equipment?
"White" socket used to connect sensors?
Possibly with an interleaved cable?
And using interrupts?

Kind regards,
Kajetan

]]>https://community.m5stack.com/topic/5690/is-it-possible-to-connect-two-m5atom-with-a-cableRSS for NodeWed, 29 Apr 2026 01:00:38 GMTWed, 04 Oct 2023 10:20:57 GMT60<![CDATA[Reply to Is it possible to connect two M5Atom with a cable... on Thu, 05 Oct 2023 09:43:07 GMT]]>Sorry!
For some reason I completely overlooked that you wanted to connect two devices together.

So the answer is yes! Get a Grove cable:
https://shop.m5stack.com/products/4pin-buckled-grove-cable?variant=16804807082074

Remove/cut the the red (+5v) wire and setup the UARTs on both devices with "crossover" pin-config.
I.e.:

  • Device A UARTx Tx=32 Rx=26
  • Device B UARTx Tx=26 Rx=32

or vice versa.

I'm not sure what you mean by "using interrupt", but you could (with same cable) define say pin 32 as output on device A and the same pin as an input defined to an interrupt on Device B and then perhaps the opposite with Pin 26

]]>https://community.m5stack.com/post/22419https://community.m5stack.com/post/22419Thu, 05 Oct 2023 09:43:07 GMT<![CDATA[Reply to Is it possible to connect two M5Atom with a cable... on Wed, 04 Oct 2023 12:36:31 GMT]]>Depends what you what you want to achieve.
If you mean to connect for programming/flashing the module - probably not.
You would need to reconfigure the UART0 to pin 26/32 - I'm not even sure this can be done.
If you just want to connect a "serial console" to communicate with your own running program then yes.
You just need to set up UART1 or 2 to GPIO26 and 32 in your own program.
Your console must be 3.3V TTL though

]]>https://community.m5stack.com/post/22414https://community.m5stack.com/post/22414Wed, 04 Oct 2023 12:36:31 GMT