Practical Tips and Techniques
We will now look at the MQTT communication capability using our Click plus PLC. MQTT stands for Message Queuing Telemetry Transport. This simple ‘publish and subscribe’ communication protocol, does not take too many resources. Constrained devices with low bandwidth are ideal for MQTT. This protocol provides machine-to-machine (M2M) connectivity which is ideal for the Internet … Read more
We will now establish communication using four different methods from our computer to the new Click Plus controller. The click programming software version 3.00 will be used for the communication methods. Click Plus controllers allow you to program them through the micro USB port on every CPU. WiFi (Bluetooth Provisioning) is also available on some … Read more
A watchdog is a piece of code that will timeout when an error occurs in our program. It will usually cause the CPU (program/sketch) to stop or reset. We will now look at the instructions for the watchdog timer in productivity blocks. This includes the Configure Watchdog, Start Watchdog, Stop Watchdog, and Pet Watchdog. Our … Read more
In part 1 we added additional discrete digital inputs and outputs modules (cards) to our P1AM-START1 (Industrial Arduino) ProductivityOpen starter kit with Ethernet. A program was then discussed that will print the modules in our system and then set and reset discrete digital inputs and outputs. P1-16TR – Productivity1000 relay output module, 16-point, 6-24 VDC/6-120 … Read more
The productivity open Arduino P1AM I/O interface chip-set supports the full suite of Productivity 1000 (P1) Inputs / Outputs expansion modules. These modules are industry approved and proven in the industrial environment. Modern industrial signal levels for digital and analog inputs and outputs are used. P1000 modules available to you include the following: • Discrete … Read more
Math instructions in your Arduino sketches (programs) consist of arithmetic operations, compound operators, absolute, power, square root, sin, cos, tan, random, map and constrain. These instructions will be generally used with other instructions in your sketch. We will be looking at each of these instructions that are available using productivity blocks. A sample program will … Read more