Firmware

FieldTunnel Firmware

Always free. Always open.

Ottawa, Canada · DHC Automation

Latest Release

v0.3.3
March 14, 2026
BACnet MS/TP gateway mode, live OTA check from fieldtunnel.com, NAT bridge with DNS forwarding, WiFi AP bridge, auto-release pipeline.
Compatible with all FieldTunnel Air W1 and Pro E1 devices
↓ Download fieldtunnel-0.3.3.bin
1,104 KB · ESP32 · ESP-IDF v5.5.1

How to Update

1
Connect your phone or laptop to your FieldTunnel device WiFi
FieldTunnel-XXXX · password: fieldtunnel123
2
Open the web UI at http://192.168.4.1 or http://fieldtunnel-xxxx.local
3
Go to Firmware in the sidebar
4
Click Choose File and select the downloaded .bin file
5
Click Upload Firmware — progress bar shows upload status, device reboots automatically (~30 seconds)
6
Reconnect to the device and confirm the new version on the Dashboard

One-click updates: Devices with internet access can update automatically from the web UI.

Go to Firmware → Check for Updates → Update Now

• Available in v0.2.1+

All Releases

VersionDateNotesDownload
v0.3.1 2026-03-14 BACnet MS/TP, OTA check, auto-release .bin
v0.3.0 2026-03-14 BACnet stub, protocol selector superseded
v0.2.1 2026-03-14 NAT bridge, OTA, live update check superseded
v0.2.0 2026-03-14 ESP-IDF baseline, APSTA, mDNS superseded
v0.1.0 2026-03-14 Arduino proof of concept archived