The Simply Modbus TCP Client license key is a unique code that unlocks the software's full features and functionality. Without a valid license key, the software will operate in a limited mode, restricting access to advanced features and functionalities. By obtaining a license key, users can:

: Users who also need the Modbus RTU/ASCII Master or Slave programs can purchase bundles to save on the total cost. For example, a 3-program bundle (RTU Master, RTU Slave, and TCP Client) costs $162 for a single user. Demo Mode vs. Licensed Version

, meaning there are no yearly renewal fees or hidden recurring costs. Modbus Tools Single Program Price Multi-Program Bundle Price 1 User / 1 PC $114 (2 programs) / $162 (3 programs) 2 Users / 2 PCs $204 (2 programs) / $288 (3 programs) Site License $420 (2 programs) / $585 (3 programs)

After payment, you will receive an email containing:

: You will receive two emails: a transaction confirmation and a manual email from info@simplymodbus.ca containing your unique license key. Activation Simply Modbus TCP Client application On the demo startup screen, click the "Enter Key" Paste your key and press Verification

The Simply Modbus TCP Client is an indispensable tool for anyone working with industrial protocols. While the demo mode is great for a quick check, securing a permanent license key is a small investment that ensures you have a reliable, secure, and professional-grade testing utility at your fingertips.

Recent versions have moved to .lic files. The vendor will email you a file. Save it to the installation folder, then use File -> Load License .