1. Introduction In the previous post, I showed you how to use timer interrupt to create multi-process, today I will show you a simpler way to create multi-process. That is using the FreeRTOS operating system. FreeRTOS Real Time Operating System is an … Continued
1. Prepare Arduino Uno Micro USB OTG Cable HMI Modbus Free software download on CH Play Here, I put the rheostat on pin A0 and Led 12 2. Arduino Programming You see my previous post and follow, remember to test … Continued
Prepare 1 Arduino board DIP. To load Bootloader and code for the board you made. A complete code project on the Arduino IDE. Since it is quite laborious and time consuming to load the code into the board yourself, you need to complete … Continued
Prepare UART TTL to RS485 . communication circuit DB9 port You wire as shown. Here I use S7-200 CPU226 with 2 communication ports. Here you do not need to attach the resistor. Then attach DB9 port to Port 0 of S7-200 2. … Continued
Prepare UART TTL to RS485 . communication circuit DB9 port You wire as shown. Here I use S7-200 CPU226 with 2 communication ports. Here you do not need to attach the resistor. Then attach DB9 port to Port 0 of S7-200 2. … Continued
Modbus is an industrial communication protocol standard that operates on the principle of “Master – Slave”. One Master can connect to many Slaves. Currently, most industrial devices use Modbus, so in order for the arduino to communicate with PLCs, HMIs, inverters, etc., … Continued
Normally when programming for arduino you only run 1 process in the loop function. But with more complex projects that will require the use of Timer interrupts. The most commonly used is to read the sensor value after a fixed period of … Continued
EEPROM is a non-volatile memory chip commonly used in computers and mobile devices to store a small amount of data that needs to be modified. EEPROM belongs to the category of “memory that does not lose data when power is stopped”. … Continued