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RS-485 typically uses a linear network with bidirectional signal wires: There are typically many devices along a RS-485 shared cable. It is interesting to measure the humidity of the ground, but we have also thought about other things; and then we have TXtemp to measure the temperature (one of the uses of TXtemp is in association with SuperClock), and for practically any type of measurement we have TXdata (RS232, RS485 ModBus) - which can be connected to thousands of existing third-party professional RS232 or ModBus meters (and there is something for all needs: temperature and humidity meters, anemometers, voltage meters, energy, light meters, water meters, presence sensors, brightness sensors, soil humidity sensors, etc. ; practically all professional meters are available in ModBus or RS232 standard; and not just meters). However, if you hold it in the short circuit mode for some time (about 2 minutes), then the next «feature» will work - thermal protection and the circuit will turn off. Devices will be linked together via a bus configuration as shown in the picture above. A shield is sometimes used to reduce EMI in twisted pair, but will reduce the maximum RS-485 operational line length.

RS485 is also commonly used for building automation as the simple wiring configuration and lengthy cable length are ideal for joining remote devices. This whole system allows manufacturing facilities to control their devices remotely and also set-up automation. Up to 32 slaves can be connected in the system. The other devices (the slaves) respond by giving the requested data to the master, or by taking the action requested in the query. Due to this and it being able to transmit data over long distances, the RS485 is used commonly as a protocol for POS, industrial and telecom. Most Modbus implementations use RS485 due to the allowance of longer distances, higher speeds and multiple devices on a single network. In this setup both the TX and RX share a single pair of wires, therefore it is limited to half-duplex data transmission as the data cannot be transmitted simultaneously to and fro each device. A single complex experiment or several individual experiments using multiple sensors can easily be monitored given the Brainchild's capability to record real-time inputs during one session.

You can easily enjoy the advantages such as low power consumption and long transmission range, without affording the cost of changing the sensors you are using. As mentioned, RS485 is used to link devices instead of other means as it provides significant advantages. This means data can be transmitted in both directions to and fro devices one direction at a time. By adding another 2 wires, making it a 4 wires system, it allows data transmission in both directions to and fro devices at the same time, also known as full-duplex. Variably, this time both TX and RX have their own 2 wires for data transmission. Commercial aircraft cabins also use RS485 for low-speed data communications. This is due to USBs’ advantages of being faster, having lower voltages, and having connectors that are simple to connect and use. As a communication protocol Modbus TCP is selected as the Ethernet due to its versatility, the continuing growth and various protocol converters, has now become the standard in industrial solutions.Built a separate communication network, based on radio Ethernet (WLAN) 802.11a, which uses a frequency of 5 GHz.

However, in a full-duplex setup, they are limited to a master and slave communication where slaves cannot communicate with each other. It doesn't even have to be a master node - the biasing node can just as well be a protocol slave, or the biasing resistors can be added someplace halfway between the nodes on a bare transmission line. Modbus devices communicate using a Master-Slave technique where only one device (the Master) can initiate transactions (AKA queries). RS-485, like RS-422, RS485 standard can be made full-duplex by using four wires. RS485 at its core with 2 wires allows half-duplex data transmission. Supports Third-party Data Loggers and IoT Platforms: Besides SenseCAP Data Logger, developers could connect to other data loggers that support MODBUS RS485 protocol and third-party IoT platforms. There is also support for Fleet management tools like Mender for easy device management and deployment. Templates can be exported and imported to support various applications.