Grbl on esp seems to be not really a thing. You can however go the Arduino nano and el-cheapo CNC board + drivers for less than $20 or so. You can usually also

Grbl on esp seems to be not really a thing. You can however go the Arduino nano and el-cheapo CNC board + drivers for less than $20 or so. You can usually also plug in an Hc-05/hc-06 Bluetooth module if you want it wireless. Beware that some of the cheapest CNC boards may have some dodgy wiring on the MS lines https://youtu.be/U839EbPw-A8?si=0SvVgZL0tX3j4P4K https://youtu.be/U839EbPw-A8?si=0SvVgZL0tX3j4P4K I've just completed a project using these parts https://doug.lon.dev/2023/09/19/astro-camera-mount.html https://doug.lon.dev/2023/09/19/astro-camera-mount.html