Avalon Nano 3S setup guide: Wi-Fi, pool, password and factory reset

In the box, per Canaan’s manual: the Nano 3S, its 140 W adapter, a manual, a pool A server that machines connect to. A regular pool shares the earnings, a solo pool does not. Solo or pool? card, the Wi-Fi dongle (the USB receiver) and a pin for the reset hole. You also need a phone with the Avalon Family app (App Store, iOS 15.5 or later, or Google Play), Bluetooth on, and 2.4 GHz Wi-Fi: Canaan’s quick start guide requires it.

Canaan also asks for a room between -5 and 30 °C with under 90% humidity. Not in a bathroom without separate wet and dry areas: if you really must, the manual asks for a residual-current device (RCD). Here is what its buttons do:

Avalon Nano 3S buttons and ports, from Canaan’s user manual and quick start guide (version 1.0, 14 February 2025)

Part	Action	Effect
Power button	Hold 2 seconds	Switches on or off (the Nano starts by itself when the adapter is plugged in)
Power button	Single press	Cycles the screen: overview, clock, logo; leaves night mode
Power button	Double press	Switches mode: low, medium, high
Reset pinhole (hidden button)	Short press with the pin	Restarts the network setup, to redo from the app
Reset pinhole (hidden button)	Hold 5 seconds	Factory reset, admin password included
USB port	Bundled Wi-Fi dongle	The connection Canaan recommends; also takes an Ethernet adapter or the update stick
USB-C socket	Bundled 140 W adapter	Power at 28 V 5 A

1. Insert the Wi-Fi dongle into the USB port before powering on, then plug the adapter into the USB-C socket. The Nano starts by itself; if not, hold the power button for 2 seconds. The screen shows the logo, then “Hi”.
2. The screen shows a phone and “Please Configure The Network With Avalon Family APP”. Turn on your phone’s Bluetooth, and connect the phone to the 2.4 GHz Wi-Fi the Nano should join.
3. In Avalon Family, tap the menu at the top right, New devices, then Nano 3S, Search, and pick nano3s_xxxx. Stay close to the machine. Several Nanos to set up? Plug their Wi-Fi dongles in one at a time.
4. Tap Connect, choose your network, enter its password, then Save. The Nano shows up on the app’s home screen.
5. Change the device password right away: Settings, then Password. The factory one is admin, printed in Canaan’s manual.

Creating an Avalon account is recommended but optional. The warranty, 360 days per Canaan’s product page, starts at the first Internet connection. The card in the box opens an account at F2Pool, a regular pool picked by Canaan: to mine solo, set it aside and enter your own pool, below.

New router, new password? Canaan’s manual describes only one method: a short press in the reset pinhole, with the pin or a paperclip. The Nano goes back to waiting for setup, and you redo the step above in Avalon Family. Canaan does not say whether the pool is kept: check it afterwards in Pool Config. Above all, do not hold for 5 seconds, which resets everything.

If your router merges 2.4 and 5 GHz under one name, split the bands or create a dedicated 2.4 GHz network: the steps are in my Bitaxe Wi-Fi guide, which applies to this miner too.

Ethernet. The Nano 3S has no network socket, but its USB port takes a USB to Ethernet (RJ45) adapter: Canaan says it is “designed to support LAN access”. With two caveats in the manual: only some single-port adapters from certain brands work, and no USB hub is guaranteed. Canaan’s documentation names no official adapter and no list of compatible models, and recommends the bundled Wi-Fi dongle. If you try an adapter, keep the dongle at hand to go back.

The Nano 3S does have a web interface, handy on a computer. To reach it:

1. Get its IP address: in Avalon Family, a long press on the Nano’s icon shows it. Your router’s device list shows it too.
2. On a computer or phone on the same network, type that address in the browser, for example http://192.168.1.42 (yours will differ).
3. Log in with the device password, admin by default, or scan the QR code shown with Avalon Family (menu, Scan).

The dashboard shows the mode, live and average hashrate Computing power: the number of attempts per second of a machine or of the whole network. The higher it is, the more tickets you play in each draw., power draw in watts, reject rate, fan, ping to the pool, the active pool and the firmware version. The Pool Config and Reboot buttons are there too. That password guards your pool, and so any earnings: Canaan advises against a short or easy-to-guess one.

For remote access away from home, Canaan made a security choice: the Nano can only be controlled from the local network, and no cloud server can send it commands. To control it from outside, Canaan’s support recommends remote desktop to a computer at home, through a VPN if needed, rather than exposing the Nano itself to the Internet.

In Avalon Family: the Nano, Settings, then Pool Config (the manual calls it Mining Configuration). Three tabs, #1, #2 and #3: #1 is the active pool, the other two normally act as fallbacks. Each tab has three fields: pool address, Worker and password. Tap Save, enter the device password (admin by default): the Nano reboots by itself to apply. In the web interface it is Pool Config, Submit, then Reboot on the dashboard.

With or without stratum+tcp://? With. Canaan never spells the rule out, but the three sample addresses in its documents, in the web interface screenshot of the quick start guide, all start that way, for example stratum+tcp://eu.stratum.braiins.com:3333: prefix, host, colon, port. So copy the full address your pool gives you, with no space before or after.

The Worker field depends on the pool. On a regular pool it is your account name, a dot and the machine name. On a solo pool it is your Bitcoin address, a dot, then the name you give the machine. Example with FindMyBlock, the solo pool I built and run (0% fee; I say so because it is mine):

Use an address from a wallet you hold the keys to, not an exchange address (which wallet to choose). The pool details are in the FindMyBlock guide, and the comparison with other solo pools in best solo mining pool. The Nano 3S also mines Bitcoin Cash, with a Bitcoin Cash address: my Bitcoin Cash pool, also mine, charges a 1.5% fee.

Solo, at its rated 6 TH/s, the Nano 3S has about a 1 in 3,190 chance per year of finding a block (network as of 17 October 2026): a lottery ticket. The calculator does the math for your fleet.

The Nano 3S has three work modes: Low, Medium and High. You switch them in the app, Working Mode, or with a double press on the button. Canaan rates it at 6 TH/s and 140 W maximum, plus or minus 5% on hashrate, and 30 dB in low mode at 25 °C. It does not publish the watts for each mode: read them on the web interface dashboard, which shows the power draw. In the screenshot in its quick start guide you can read, for example, high mode, 6.39 TH/s and 131 W.

Those watts become heat: Canaan presents it as a small heater that mines. Air leaves at 60 to 70 °C in a 25 °C room, per its manual, and the outlet grille can be aimed. Keep hands, curtains and pets away from it, and wait half an hour after switching off before handling it. At night, night mode turns off the screen and lights.

On the bill, at €0.20 per kWh, 140 W day and night, the rated maximum, come to at most about €245 a year, for about €71 of average earnings in a regular pool (network as of 17 October 2026). The full math, and which mode to pick on each day colour of EDF’s Tempo tariff (a French plan), are in heating your home by mining and power use and electricity cost.

Only from Canaan: the manual advises against any third-party firmware. Three official ways in:

• The web interface shows a “New Firmware Available” link when a new version exists.
• A USB stick, the manual’s method: copy the file to a FAT32 stick, insert it in the USB port with the machine off, then power on. The update starts by itself; do not touch anything while it runs, and start again if it fails.
• Canaan’s official Firmware & Document page, Home Series filter. In October 2026 the latest version listed for the Nano 3S is number 2025061101. It is loaded with the “Avalon Home Series Firmware Upgrade Tool”, for Windows, Mac and Linux, and a USB-A to USB-A cable: pin held for 2 seconds while powering on, Wi-Fi dongle removed, as Canaan’s tutorial details.

After an update with the tool, the Nano runs an automatic burn-in: about one hour in the current mode, during which it will not change mode, then you switch to the next mode yourself, until all three modes switch freely. That is expected. If your Nano mines fine, there is no rush: write to Canaan support first to ask whether the new version concerns you.

Factory reset. With the Nano plugged in, push the pin into the reset hole (the “hidden button”) and hold for 5 seconds. The Nano returns to its factory settings: the password goes back to admin, which is also the fix for a forgotten password. Then set up the Wi-Fi again in Avalon Family, and check the pool. Do not confuse it with the short press, which only restarts the network setup.

The filter. The Nano 3S has its own air filter, on the air inlet (the diagram on the manual’s first page shows where). When it clogs, the screen shows a filter icon and “Filter”, and the app sends an alert. Switch off, let it cool, remove the filter, wash it in clean water, no detergent, let it dry, put it back. Power on, then in Settings tap Filter Clear to reset the counter. Never run it without the filter: dust would get inside.

Beyond that, run a vacuum over the inlet and outlet grilles with the machine unplugged, and wipe the case with a damp cloth. Canaan asks you not to open the case. If heat worries you, other things to check are in my guide to a miner running hot.

Common Avalon Nano 3S problems and fixes taken from Canaan’s documents (manual, quick start guide, support articles), checked on 28 October 2026

What you see	Likely cause	What to do
The app cannot find nano3s_xxxx	Bluetooth off, phone too far, several Nanos powered	Turn Bluetooth on, move the phone closer, plug the Wi-Fi dongles in one at a time
The Nano will not join your Wi-Fi	5 GHz network or merged bands, wrong password	Give it a 2.4 GHz network, then short-press reset and set it up again
The app shows it offline while it mines	The app lost track of it (night mode, reinstall)	Leave night mode with the button, then +, Add Device, Add Networked Device and its IP
0 TH/s, no accepted shares An attempt good enough to be counted by the pool. It proves your machine is working, even if it is not enough to find a block.	Wrong pool address, port or Worker field	Check the three fields (pool section above) and let the Nano reboot
Password rejected	Password changed, then forgotten	Hold reset for 5 seconds: it goes back to admin
Filter icon and “Filter” on screen	Clogged filter	Switch off, wash the filter, then Filter Clear in the app
Mode locked after an update	Automatic burn-in after flashing	Let it run about 1 hour, then switch to the next mode, until all three modes switch freely
USB-C plug hot, smell	Connector fault Canaan reported on some Nano 3S units	Unplug at once and write to support with the serial number and photos

The last case deserves a closer look. Canaan published a notice about USB-C connectors that overheated, or even melted, on some Nano 3S units under continuous load, in humid places or with a partly seated plug. Canaan says it has no fire reports, and offers a free replacement, with no time limit, for affected units. Meanwhile: plug fully seated, bundled adapter and cable, no damp garage, and no cable pulling on the plug.

For the rest, the app has a Support feature that walks you through simple fixes and can send a diagnosis to after-sales. If you are still torn between this miner and a Bitaxe, my Nano 3S vs Bitaxe Gamma comparison will help.