ModalAI Forum

@sjt277 , I am sorry this happened to you. In order to help evaluate the issue, can you please post photos of both sides of the M0138 ESC board (high resolution, please, you could share a link if the forum does not accept it). Also please point out in the picture which component is getting hot. Also, since you are using a power supply, it should provide the current draw when you attempt to power on the ESC. Please let us know the voltage and current reading on the power supply and whether it is changing. Did the ESC work at first (spinning motors) and then stopped working at some point? Please note that testing ESCs using a power supply often lead to permanent damage due to regenerative spikes when the motor is braking (causing over-voltage). https://docs.modalai.com/voxl-escs/faq/#unboxing-and-testing-new-standalone-esc Alex

@sjt277 , The simplest approach is to use a separate USB-to-serial adapter for each ESC. You can set up udev rules to map and distinguish the specific usb-to-serial adapters (using their unique serial numbers) to aliases in /dev/, such as /dev/esc0, /dev/esc1, etc. Then run your testing using different USB devices to access each ESC (i am assuming you are using voxl-esc tools?). For example, here is some relevant information: https://askubuntu.com/questions/49910/how-to-distinguish-between-identical-usb-to-serial-adapters Does that help? Alex