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1. #Arduino i2c example two way data communication how to#
2. #Arduino i2c example two way data communication serial#
3. #Arduino i2c example two way data communication download#

Understand the operation of the RS 485 module.Perform the circuit assembly on the protoboard.Therefore, through this article you will learn:

#Arduino i2c example two way data communication serial#

The Arduino Slave (Transmitter) will perform the temperature measurement using a DS18B20 digital sensor and will send this measured value via serial / RS485 to the Arduino Master (Receiver) that will write on the LCD display 20 x 4 I2C the received temperature value.

#Arduino i2c example two way data communication how to#

So in this article, we will learn how to monitor the temperature of an environment and receive the measured value through serial / RS485 communication between two Arduinos. Thus, RS485 communication can be used in any type of environment due to its robustness. This integrated circuit plays a role in adapting the TTL logic level to the logic level required for RS485 communication. For this, we need to use the integrated circuit called MAX485. However, many devices have RS232 communication and need to transmit data over long distances. It allows network communication in point-to-point mode and suffers more from electromagnetic interference. In addition to RS485 communication, there is also RS232 communication.

This cable model reduces electromagnetic interference since we have a differential communication signal and this contributes to being more immune to noise and electromagnetic interference. It allows communication over long distances and uses twisted pair cable. The RS485 communication standard is suitable to be implemented in the industry, as it accepts several network topologies such as Star and ring, for example. The RS485 communication standard is the physical layer of the communication network, and several protocols such as Modbus, Profibus, and others can be implemented. So the communication network needs to be robust, in view of this need, the RS485 communication standard was created. However, the industry is an environment that suffers from the presence of many electromagnetic interferences due to the activation of motors, solenoids, and other actuators. Generally in industries, we have several machines and equipment (PLCs, CNC, frequency inverters) controlling and monitoring the most diverse industrial processes.įor all of this equipment to work together, it is essential that there is a communication network between them. Apply the JLC-REBE coupon in the payment area.

#Arduino i2c example two way data communication download#

Download the gerbers files from the project link Īpply the JLC-REBE coupon in the payment area.

The coupon is: JLC-REBEĭownload the gerbers files from the project link They released a coupon to earn 5 units of that card. Wire.Link to download the Arduino compatible board: M_temperature = temperatureSensors.getTempCByIndex(0) ĭata = m_temperature * 10 // In order to use short, I multiple by 10 TemperatureSensors.requestTemperatures() If(millis() - m_timestamp < READ_CYCLE_DELAY) return

Wire.onRequest(requestEvent) // Set the request event handler Wire.begin(NODE_ADDRESS) // Activate I2C network Serial.println(BUFFER_SIZE * sizeof(short)) Change it from one device to anotherĭallasTemperature temperatureSensors(&oneWire) In order to use only two bytes and not four (float is four bytes), I multiple the temperature in 10, and save it as a short.įor (int slaveAddress = FIRST_SLAVE_ADDRESS Please notice that the temperature is a float (24.3). The first one is for temperature, and the second one is for moisture. In this example the slave sends two short numbers. The following example shows how the master can receive data from multiple slaves.