ab5 can work as a USB HID keyboard when used in USB-host mode make sure you’re using the correct USB Host wiring and the HID example/library, test with a simple key report first, and verify power/ground are stable (some USB keyboards need extra 5V supply). See discussions and example code in this thread: https://community.m5stack.com/topic/buyers agent/7689/tab5-usbhidkeyboard and check the official docs for that should get you started; post your wiring and code snippets here if you want specific debugging.

To extend the IR range on an M5Stack, the best approach is to use a high-power IR LED paired with a transistor or MOSFET driver to safely handle higher current. Adding a lens or collimator can also help focus the beam for much greater distance and accuracy, and ensuring the signal is properly modulated (like 38 kHz) will improve compatibility with most IR receivers. Just make sure your power supply can support the increased draw from stronger hardware. If you share your budget and required range, I can suggest specific components.

It sounds like the M5 Tough’s battery issues were likely caused by a polarity or connector mismatch—there’s no strict standard for that battery plug, so reversing positive and negative can easily overheat or damage the board. Before powering up again, double-check the connector pinout with a multimeter, ensure your LiPo has proper protection circuitry and matches the expected 3.7–4.2 V range, and avoid using USB and battery power simultaneously until you confirm how the board switches between them. A proper match should let the Tough run smoothly on battery without overheating or shutting down.