Plan C | Octopi and Smartplug Over-temp Shutoff Protection for 3D Printer @Plan-C | Uploaded October 2018 | Updated October 2024, 3 hours ago.
Use a Raspberry Pi and a smartplug to shut-off power to a 3D printer if the temperature of the heated bed or hot end go out of bounds.
This helps protect against a situation where the mosfet or solid state relay controlling heated bed or hot end fails short circuit. In this case, the micro controller will be unable to shut off the heater and the thermal runaway protection in firmware will be useless.
This solution will shut off all power by turning off the plug at the socket if an overtemp is detected. This uses a TP-Link smartplug (a Wemo should work too).
The plugins are TPLinkSmartplug and Temperature Failsafe.
The video walks you through setting up the Pi from scratch and installing and configuring the plugins.
The required shell script can be copied and pasted and is linked on github here:
github.com/jneilliii/OctoPrint-TPLinkSmartplug/issues/59
These instructions were given by the author of the plugin.
I also walk you through how to reserve an ip address for the smartplug in your router so that the pi can always find it, even if the router is re-booted.
The last section of the video covers the fake ftdi chips in some printers. I show me swapping out a fake ft232 on my Tevo Tornado for a genuine one. If you have a Tornado, check if the FTDI chip is genuine before attempting what I show you in this video. Symptoms of a fake chip are a flaky serial connection, frequent timeouts and issues updating firmware.
The pi and smartplug add an extra layer of safety but YOU SHOULD NEVER LEAVE YOUR 3D PRINTER UNATTENDED WHILST PRINTING.
The pi needs to be connected to the printer for this to work and should be shut down properly via the web browser on your phone or laptop after use. Pulling the plug on a raspberry pi to turn it off may corrupt the sd card and make it un-bootable.
Good luck all.
Use a Raspberry Pi and a smartplug to shut-off power to a 3D printer if the temperature of the heated bed or hot end go out of bounds.
This helps protect against a situation where the mosfet or solid state relay controlling heated bed or hot end fails short circuit. In this case, the micro controller will be unable to shut off the heater and the thermal runaway protection in firmware will be useless.
This solution will shut off all power by turning off the plug at the socket if an overtemp is detected. This uses a TP-Link smartplug (a Wemo should work too).
The plugins are TPLinkSmartplug and Temperature Failsafe.
The video walks you through setting up the Pi from scratch and installing and configuring the plugins.
The required shell script can be copied and pasted and is linked on github here:
github.com/jneilliii/OctoPrint-TPLinkSmartplug/issues/59
These instructions were given by the author of the plugin.
I also walk you through how to reserve an ip address for the smartplug in your router so that the pi can always find it, even if the router is re-booted.
The last section of the video covers the fake ftdi chips in some printers. I show me swapping out a fake ft232 on my Tevo Tornado for a genuine one. If you have a Tornado, check if the FTDI chip is genuine before attempting what I show you in this video. Symptoms of a fake chip are a flaky serial connection, frequent timeouts and issues updating firmware.
The pi and smartplug add an extra layer of safety but YOU SHOULD NEVER LEAVE YOUR 3D PRINTER UNATTENDED WHILST PRINTING.
The pi needs to be connected to the printer for this to work and should be shut down properly via the web browser on your phone or laptop after use. Pulling the plug on a raspberry pi to turn it off may corrupt the sd card and make it un-bootable.
Good luck all.
