Resetting all WiFi credentials

This is a guide for erasing all the WiFi credentials from a machine. This helps for roasters that are stuck “connecting” to a wifi that otherwise should have worked, or when you want to change which network your machine is connecting to.

Procedure

Requirements:

• USB-B cable (or micro-USB cable if not available).

• Computer (Windows or Mac)

Step 1: Download and install the CLI tool

• For windows: Windows CLI installer

• For Mac/Linux: Installing CLI on a Mac

Step 2: Connect with USB

If you have a USB-B cable, you can plug it into the socket at the back of the roaster.

If you want to use a micro-USB cable, first take off the top plate. Disconnect the USB plugged into the PCB and plug in your micro-USB cable there instead.

Step 3: Download system files

Download the following files

• erase_all

• ROEST default firmware.bin

Step 4: Open Command Prompt / Terminal app

On Windows

• Open the folder that you downloaded the system files into (by default, this is your ‘Downloads’ folder).

• Click in the navigation bar (or press Alt-D)

Type cmd and press enter

This should open a Command Prompt window that is automatically in the correct folder

On Mac

• In Finder, locate the folder containing the firmware.

• Right click (or hold the Mac button and click) on the folder, go to ‘services’, then click ‘New Terminal at Folder’.

Step 5: Enter DFU mode

Turn on the roaster and put it in DFU mode:

In the Command Prompt or Terminal window, type:

particle usb dfu

You will get the message “Done” if it is successful.

Step 6: Erase settings

While the device is in DFU mode, type the following into your Command Prompt or Terminal window:

particle flash --usb erase_all.bin

This will erase the WiFi settings and clear the EEPROM (Programmable Read-Only Memory).

Step 7: Reinstall default firmware

Put the machine back in DFU mode by typing:

particle usb dfu

into the Command Prompt or Terminal window. Next, type in

particle flash --usb ROEST-default-firmware.bin

This will reinstall our firmware. The roaster should automatically restart when this is complete.

Step 8: Connect to WiFi network

You now need to give the roaster new WiFi credentials. You can easily do this over USB while you’re connected to the roaster. To do this, first type in:

particle usb start-listening

to put the roaster into WiFi Setup mode. Next, type:

particle serial wifi

and follow the prompts to connect the roaster to the network.

If you need more help, here is a more detailed guide to setting up WiFi with the command prompt.

Alternatively, you can set up the WiFi network with the ROEST app on an Android phone, or with the Particle app on iPhone.