MeshCore flasher

Flashing failed!

Flashing...

Please do not disconnect the device

Flashing complete!

{{ flashing.log }}

Flash & set up your observer

Get a MeshCore Observer node on the air in a few minutes. Everything is done in the browser — no drivers or command-line tools required.

info

Flashing needs the Web Serial API — use Chrome or Edge on a desktop computer. Phones and Safari can't flash.

Flash the firmware

Connect your board

Plug your MeshCore device into your computer with a USB data cable.

Pick your device & role

In the flasher, choose your board — use the filter box if you have a long list — then pick a role: Repeater or Room Server. Choose Repeater (the recommended option); it forwards packets and uplinks them to your MQTT broker(s). Pick Room Server only if you also want the node to host a chat room.

Choose a version and flash

Leave the version on the current release — the one without a -dev suffix — unless you specifically want to try a development build. Then click Flash! and grant serial access when prompted. Keep the device connected until it reports Flashing complete.

Updating an existing device? Leave Erase device unchecked so your identity and settings are preserved.

Configure your observer

After the first flash, set the radio parameters, a device name, WiFi credentials, and your MQTT broker(s). The quickest way is over USB: click Console in the header to open the serial console, then run these commands (substitute your own values):

set radio 910.525,62.5,7,5 set tx 22 set name MyObserver set mqtt.iata XXX set wifi.ssid YourWiFiNetwork set wifi.pwd YourWiFiPassword reboot

Radio settings must match your regional mesh — the values above are only an example. Replace XXX with the 3-letter IATA code of your nearest airport. See the full guide for timezone, additional MQTT presets, and commands to verify the connection.

menu_book Read the full setup guide open_in_new

chevron_right First-boot web configuration Beta

A newer, cable-free option: on first boot (or after a full erase) the observer starts its own WiFi hotspot and serves a configuration page. This is still in beta — if anything misbehaves, fall back to the USB console commands above.

Join the setup hotspot

Power on the device and, within its first few minutes, open the WiFi list on your phone or computer. Join the network named MeshCore-Setup-XXXX (the suffix is unique to your device).

The observer's setup network as it appears when joining WiFi.
Open the configuration page

Your device should open the setup page automatically. If it doesn't, browse to http://192.168.4.1 in any browser.

The configuration portal landing page.
Enter your settings and save

Fill in your radio parameters, device name, WiFi network, and MQTT broker preset(s), then save. The observer reboots, joins your WiFi, and starts uplinking mesh traffic.

Radio, WiFi, and MQTT settings on the configuration page.