Joining a growing number of technology companies who are using smartphone apps to offer their services to developers and engineers is Sealevel Systems which has just released an Apple iPhone, iPad and iPod app for its Modbus Connect http://www.sealevel.com/https://itunes.apple.com/us/app/sealevel-modbus-connect/id871566911
This free app for iOS 7 and later allows easy communication with Sealevel Modbus TCP compatible products including SeaI/O and eI/O modules. It can be used to access the registers, coils and discretes of a Modbus device from a connected iPhone or iPad. http://www.sealevel.com/support/article/AA-00608/
The app includes low-level Modbus support that separates the hardware data acquisition layer from the software application layer, simplifying set up and configuration.
Plant engineers can use Sealevel Modbus Connect to monitor and control I/O remotely, saving time and decreasing downtime. I/O status is displayed using easy to understand graphical screens that support both portrait and landscape orientations.
The in-depth access to Modbus operation quickly identifies errors that might otherwise require extensive troubleshooting. Users can easily send custom Modbus requests and access raw request and response frames. The app can even be used as an educational tool for anyone that wants to learn Modbus.