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Code for new backend: https://github.com/ldevulder/os-autoinst/commit/7ce834c70492c75e8591c2860b65dea0efdc3bc1.
It uses the same principle as the IPMI backend.

The same GPIO logic can be applied in a script for "generalhw" backend, as well as the console connection with picocom (for the serial/graphical redirection, mainly useful for the boot process). "Standard" connection should be done by SSH.

ldevulder wrote:

Code for new backend: https://github.com/ldevulder/os-autoinst/commit/7ce834c70492c75e8591c2860b65dea0efdc3bc1.
It uses the same principle as the IPMI backend.

The same GPIO logic can be applied in a script for "generalhw" backend, as well as the console connection with picocom (for the serial/graphical redirection, mainly useful for the boot process). "Standard" connection should be done by SSH.

I think we should reuse existing backend as much as possible. See parent task.

Anyway, we also need to define some hardware first. Could be:

1. existing power supply which could be remotely controlled by USB, Ethernet, you name it.
2. custom control (GPIO?) controlling a relay, such as https://www.amazon.com/DAOKI-Arduino-Indicator-Channel-Official/dp/B00XT0OSUQ/ref=sr_1_5?keywords=ELEGOO+relay&qid=1575536135&sr=8-5 which default to power off.

Solution 1 is great if it exists at all.
Solution 2 will require some hardware work to do it properly

ggardet_arm wrote:

I think we should reuse existing backend as much as possible. See parent task.

Agree.

Anyway, we also need to define some hardware first. Could be:

1. existing power supply which could be remotely controlled by USB, Ethernet, you name it.
2. custom control (GPIO?) controlling a relay, such as https://www.amazon.com/DAOKI-Arduino-Indicator-Channel-Official/dp/B00XT0OSUQ/ref=sr_1_5?keywords=ELEGOO+relay&qid=1575536135&sr=8-5 which default to power off.

Solution 1 is great if it exists at all.
Solution 2 will require some hardware work to do it properly

I used Solution 2 for my tests, it works well but needs some code and not so "professional" (but it's the cheapest version :D). Definitely Solution 1 would be better for o3.

I have a Tenma 72-2535 which can be controlled by USB (/dev/ttyACMx port) with a simple python lib: https://github.com/kxtells/tenma-serial
I used it successfully with:

Power OFF script:

#!/bin/sh
echo "Powering OFF"
tool_path=/tmp/tenma-serial/tenma
device=/dev/ttyACM0
pushd $tool_path/
python tenmaControl.py --off $device
popd

Power ON script:

#!/bin/sh
echo "Powering ON"
tool_path=/tmp/tenma-serial/tenma
device=/dev/ttyACM0
pushd $tool_path/
python tenmaControl.py -c 3100 -v 5000 --verbose  $device # Set to 5V and max 3.1A
python tenmaControl.py --on $device
popd

But you still need to connect wires from Power Supply to GPIO header (2x 5V, 2x Ground), or build a custom micro-USB (or USB-C for RPi4) cable to connect to the standard power supply connector.

Not sure if such a power supply would fit in o3 room, though.

We could also use a smart power strip, such as: https://www.netio-products.com/en/device/netio-4
and just use regular PSU for the SUT.

I also used a TP-Link HS100, connected on local WiFi, and controlled from command line with python3-kasa.