ATIO

ATIO is RP2040 firmware that lets you control IO with an AT command set.

Usage

Plug the device into a computer.

$ minicom -D /dev/ttyACM0 -b 115200

Building

To build the RP2040 firmware, assuming you have pico-sdk installed:

$ mkdir build
$ cd build
$ cmake ..
$ make

To build and run a simulated version on Linux for debugging/testing:

$ make
$ ./atio

Protocol

ATIO received commands can be terminated with CR, LF or CRLF.

ATIO transmitted messages are terminated with CRLF.

ATIO sends informational messages prefixed with "#".

When ATIO is initialized it will send "READY".

ATIO commands respond with "OK", "ERROR" or "+value".

Test

> AT
< OK

Reset device

> AT+RST
< ...
< READY

Set direction of GPIO n (0 = input, 1 = output)

> AT+GPIODn=X
< OK

Example:

> AT+GPIOD5=1
< OK

Enable pull-up resistor for GPIO n

> AT+GPIOPUn
< OK

Enable pull-down resistor for GPIO n

> AT+GPIOPDn
< OK

Disable pull-up/pull-down resistors for GPIO n

> AT+GPIOPNn
< OK

Set value for GPIO n

> AT+GPIOn=1
< OK

Get value for GPIO n

> AT+GPIOn?
< +1

License

ATIO is released under the Lone Dynamics Open License.