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Intelligent Sensor Interfaces and Data Format
Published in Fei Hu, Qi Hao, Intelligent Sensor Networks, 2012
Konstantin Mikhaylov, Joni Jamsa, Mika Luimula, Jouni Tervonen, Ville Autio
The 1-wire interface is intended to provide a low data rate communication and power supply over a single physical line [12]. As revealed in Figure 3.3d, the 1-wire network consists of a master device and several slave devices that are connected over the single physical line. The 1-wire line is pulled up with a resistor and can be used for supplying power to the slave devices [12]. The communication over 1-wire bus starts with the reset and synchronization sequence, when the master device first pulls the 1-wire line down for the period of time over 480 µs and then releases it. After that, the connected slave devices have to signal their presence by pulling the 1-wire line down. Thereafter, the master device can start sending or receiving data from the slave devices. For this, the master device first selects the required slave device by sending its unique 64-bit serial number during the read only memory (ROM) command phase and then it starts sending or receiving the actual data. If the master device does not know all of the connected slave devices, it can discover their serial numbers using special procedures. The transmission of each single bit from master to slave, or vice versa, for a 1-wire bus is initialized by the master device by first pulling the line down and then releasing it (for transmitting “1” or receiving data from slave) or keeping it low (for transmitting “0”). The main advantages of a 1-wire bus are its simplicity and the support for device discovery and single-valued identification. The main disadvantage of the 1-wire interface is its low data rate, which usually does not exceed 16 kbit/s, although this low data rate allows implementation of 1-wire networks with cable lengths up to 300 m [13].
Build a Milk Quality Testing Device
Published in Anudeep Juluru, Shriram K. Vasudevan, T. S. Murugesh, fied!, 2023
Anudeep Juluru, Shriram K. Vasudevan, T. S. Murugesh
The 1-wire communication protocol is similar in concept to the I2C protocol but with slow data transmission rates and longer range. It is a low-cost serial signalling protocol designed by Dallas Semiconductor Corp. (now acquired by Maxim Integrated). A typical 1-wire network consists of a single master connected to one or more slaves through the 1-wire bus as shown in Figure 25.7. To accommodate the use of only one wire, the 1-wire communication protocol combines the clock, data and power into a single signal.
Sensors
Published in Volker Ziemann, A Hands-On Course in Sensors Using the Arduino and Raspberry Pi, 2018
The DS18b20 temperature sensor, as was the LM35 discussed earlier, is based on a bandgap temperature sensor. Here, however, ancillary digital electronics and signal processing circuitry is added on the chip such that the measurement value is postprocessed and made available using the so-called Dallas 1-wire bus protocol. The 1-wire protocol uses only ground and a single additional wire to transmit power and information to and from the device.
Smart selection from petri net modeling tools for fast developing a manufacturing system
Published in Cogent Engineering, 2022
Yi-Nan Lin, Cheng-Ying Yang, Gwo-Jen Chiou, Sheng-Kuan Wang, Victor R.L. Shen, Yu-Ying Wang, Hai Hoang Bui, Jianzhi Wang
The 1-wire search algorithm (Maxim Integrated Inc, 2018) was defined and provided by Maxim Integrated corporation for application in their 1-wire device family, i.e., DS2483, DS18B20, and DS1482. 1-wire is a device communication protocol designed by Dallas Semiconductor Corporation, defined as multiple devices which can share the same bus on one line for transmitting and receiving signals. Thus, each device on the bus must be assigned a unique address. Thus, each Maxim’s 1-wire device has a 64-bit unique registration number in read-only-memory (ROM) which is used to navigate them by a 1-wire master in a 1-wire network. If the number of the device’s ROMs is unknown, then they can be found by using the 1-wire search algorithm.