First boot
A walkthrough sets your time zone, Wi-Fi, Mesh node name and radio region. Replay it from Settings > System.
Install E32
Install from your browser
Pick your board, plug it in, and press Install. It takes about two minutes and needs Chrome or Edge on a Mac, Windows or Linux computer.
1. Choose your board
Not sure? Turn the board over. The version is printed near the USB-C port.
2. Connect and install
Plug in with a data cable
Use a USB-C cable that carries data, not a charge-only cable.
Turn the T5 on
If the browser can't find it, hold BOOT, tap RST, then release BOOT.
Press Install and pick the port
Choose the entry named
USB JTAG/serial debug unitand select Connect.Wait for "Installed"
Keep the cable in. The T5 restarts on its own and opens a short walkthrough.
Latest release
E32 v0.1.0 for T5 S3 Pro V2
Released 2026-11-xx · 5.6 MB · Writes bootloader, partition table and firmware
In the real site this button is ESP Web Tools, which reads a manifest and flashes over WebSerial. Disabled in this mockup.
SHA-256 3f9a…c21e (placeholder)
Prefer to do it by hand?
Download the merged image and flash it with esptool from a terminal.
esptool.py --chip esp32s3 --baud 921600 write_flash 0x0 e32-v0.1.0-t5s3pro-v2.bin
Check the file first with shasum -a 256 e32-v0.1.0-t5s3pro-v2.bin and compare it with SHA256SUMS.
After installing
Add books and maps
Use Wi-Fi transfer from any browser, or copy files to the SD card on your computer.
Going back
Flash LILYGO's factory firmware or upstream CrossPoint the same way. Your SD card is untouched.
Troubleshooting
No device shows up in the picker
Try another cable and port, close other apps that use serial ports (Arduino, PlatformIO, Meshtastic), then use the BOOT and RST buttons to enter download mode.
The screen stays blank after installing
Unplug the cable and press the power button. If it is still blank, install once more.
My browser says WebSerial isn't supported
Safari and Firefox can't flash devices. Use Chrome or Edge on a computer, or follow the manual steps.