Updating Cassandra
2 min read
December 1, 2025Firmware Update
This guide will walk you through updating the firmware on your Cassandra device.
1. Download Firmware
You will need to download the correct firmware for your device type.
2. Run the Uploader
After downloading, you need to unzip the file. Then, run the cassandra-uploader.exe via double click. Network settings can be configured in the unzipped ‘assets’ folder, in network.json file.
The application will show you the progress of the process and stores a log file in the same folder. Reboot the device after the process is complete.
Repeat the process for the Slave device.
3. Configure Network Settings
After the firmware update is complete, you will need to reset your device and configure its network settings.
- Reset the device.
- On your computer or phone, search for Wi-Fi networks and connect to
PolyMech-AP. - Open a web browser and navigate to http://192.168.4.1.
- Go to the Settings page, and then to the Network section.
You will see a form to configure the Station (STA) Mode. This allows the Cassandra device to connect to your existing Wi-Fi network. The form will look similar to this:
- Station (STA) Mode
- Connects to an existing Wi-fI network.
- STA SSID: Your Wi-Fi network’s name (e.g., Livebox6-EBCD).
- STA Password: Your Wi-Fi password. The placeholder says “Leave blank if no change”.
- STA IP Address: The static IP for the device.
- STA Gateway: Your network’s gateway address.
- STA Subnet Mask: Your network’s subnet mask.
- STA Primary DNS: Your network’s primary DNS server.
- STA Secondary DNS: Your network’s secondary DNS server.
For the Plastiq client master device, please use these specific settings:
- STA SSID:
CircularMaterialsCenter - STA Password:
Your Wi-Fi Password - STA IP Address:
192.168.239.250(192.168.239.251 for slave) - STA Gateway:
192.168.238.1 - STA Subnet Mask:
255.255.254.0 - STA Primary DNS:
192.168.238.1 - STA Secondary DNS:
100.10.100.1
After filling in the details, click the Save STA Settings button. The device will restart and attempt to connect to your Wi-Fi network with the new settings.
4. Configure the Device
- After patching the firmware, ensure that LoadCell Modbus address is set correctly. In Settings -> Advanced -> General -> Press
1.1 LoadCell Modbus Address - Master ( Loadcell Slave Id 0 ): 20
1.2 LoadCell Modbus Address - Slave ( Loadcell Slave Id 0 ) : 21