Official releases are hosted on GitHub under the ModRSsim2 repository, which is a modern fork of the original source with several updates. You can also find the software on SourceForge or as a ready‑to‑use bundle from various developer portals, but the GitHub release page is the recommended source for the most current build.
is a legacy Modbus serial and TCP simulator. In its original versions by Conrad Braam, it featured a registration system where users could enter a name and a registration key to remove "unregistered" status in the "About" dialog.
Searches for registration keys may inadvertently lead to discussions about or Modbus Slave from modbustools.com. These are proprietary, paid tools that offer a 30-day trial before requiring a purchased license key. It is important not to confuse these with the free tool mod_RSsim . Attempting to crack these tools is illegal and constitutes software piracy.
: It supports standard Modbus data models, including Coils (0x), Discrete Inputs (1x), Input Registers (3x), and Holding Registers (4x). SourceForge
Copy and paste your exact registration name and registration key into the corresponding fields. Click or Activate .
A legitimate MOD-RSSIM registration key unlocks access to official updates, patches, and technical support. With a cracked key:
Official releases are hosted on GitHub under the ModRSsim2 repository, which is a modern fork of the original source with several updates. You can also find the software on SourceForge or as a ready‑to‑use bundle from various developer portals, but the GitHub release page is the recommended source for the most current build.
is a legacy Modbus serial and TCP simulator. In its original versions by Conrad Braam, it featured a registration system where users could enter a name and a registration key to remove "unregistered" status in the "About" dialog.
Searches for registration keys may inadvertently lead to discussions about or Modbus Slave from modbustools.com. These are proprietary, paid tools that offer a 30-day trial before requiring a purchased license key. It is important not to confuse these with the free tool mod_RSsim . Attempting to crack these tools is illegal and constitutes software piracy.
: It supports standard Modbus data models, including Coils (0x), Discrete Inputs (1x), Input Registers (3x), and Holding Registers (4x). SourceForge
Copy and paste your exact registration name and registration key into the corresponding fields. Click or Activate .
A legitimate MOD-RSSIM registration key unlocks access to official updates, patches, and technical support. With a cracked key: