Firmware Update Guide

Update your ISOBUS Block firmware over WiFi using the web interface.

Before You Start

You'll need:

• The firmware file (.bin)
• The OTA key from the VT display (see Finding the OTA Key)
• A device (phone/laptop) connected to the ISOBUS Block WiFi

Update Procedure

1. Get the OTA Key

• On the tractor VT, press INFO soft key
• Note the 4-character OTA key

2. Connect to Device WiFi

• Connect your phone/laptop to Block_relay_XXX

3. Open Update Page

• Go to http://192.168.4.1/update

4. Enter OTA Key

• Type the 4-character key in the OTA Key field

5. Select Firmware File

• Click Choose File
• Select the .bin firmware file

6. Upload

• Click Upload & Install
• Wait for the progress bar to complete
• Do not close the browser or disconnect

7. Restart

• The device restarts automatically
• You'll be disconnected from WiFi temporarily
• Reconnect after about 10 seconds

After Update

• Check the firmware version on Settings page or VT Info screen
• Test basic functionality (inputs, outputs, VT connection)
• The previous firmware is kept for rollback if needed

Update Tips

• Keep power stable during update - don't disconnect power
• Updates take about 30-60 seconds depending on file size
• Maximum firmware size: 3 MB
• If update fails, the device continues running the old firmware

Troubleshooting

"Invalid OTA key" error

• Double-check the key from VT Info screen
• Key is case-insensitive but must be exact

"Firmware too large" error

• The firmware file exceeds the 3 MB limit
• Contact support for a compatible firmware

Upload stuck/failed

• Don't close the browser during upload
• Stay connected to the device WiFi
• Try power cycling and attempting again

Device not responding after update

• Wait 30 seconds for restart to complete
• Reconnect to WiFi
• If still not working, see Firmware Rollback

Common firmware questions — whether updates are free, what the OTA key is, rollback — are answered on the FAQ — Firmware section.