2) the GSM version also allows you to indicate a possible PIN (leave blank if there is no PIN) and the operator's APN (possibly you can search for it on Google). 2) the GSM version also allows you to indicate a possible PIN (leave blank if there is no PIN) and the manager's APN (search for it on Google if you don't know). Not only that, it can also be used to know if there is water in any place or not; for example, positioned appropriately, it can be used to know if a tank or a drinking trough is full or empty, or if a well has reached a certain level (eg to stop pumping water). TXSoil can transmit the humidity to a Web server or to a VisualVision's display / concentrator such as DisplayRX or ControlHUB or RXTXeasy GSM - with adjustable interval, remaining for the rest of the time in standby with very low consumption. You would think that this would mean that when a 1 is being transmitted "A" would be high and "B" would be low. Please note that a RS-485 network is a single pair of wires, but there is nothing in the RS-485 standard that prevents more than one RS-485 network from being used by each device.

All with adjustable transmission interval, and being able to use WiFi, Radio frequency and / or GSM. This with WiFi transmission for the Standard version, and in the RF version also with radio transmission at 433MHz (covering longer distances and with less battery consumption thanks to special optimizations). The Standard version transmits in WiFi, HTTP/MQTT. Last but not least there is also the GSM version which is useful especially if in the place where we are there is only one temperature to transmit to the server (calling a GET/POST script on your server; Web server which can also be the "internal" ControlHUB server, which already has the script to receive the data automatically). There are two other devices in this figure (receiver and transciever) that are connected to the transmission line the same way. An RS232 interface is a system based on voltage levels and performs optimally in situations where there are minimal differences in ground potential. There is no wire shown connecting this third point between driver and receiver. After connecting as for point B, in the Settings it is possible to define a name for the device, and if the reading periodicity is less than 250 minutes, you can set an interval of hours in which the reading is not carried out / transmitted (for example you can disable the night).

It defines a means of exchanging control signals and binary serialized data signals between data terminal equipment and a data communication channel in cases where interchange point. In most digital logic a binary 0 is usually considered OFF and a binary 1 is ON. For normal logic when the input of a driver is a 1 or high, the non-inverting output will go high. RS-485 figure 2 shows a generator (driver) with two interface connection points labeled "A" and "B". In contrast to RS-422, which has a driver circuit which cannot be switched off, RS485 standard RS-485 drivers use three-state logic allowing individual transmitters to be deactivated. RS485 drivers : Up to 1200 m. The RS485 protocol employs a differential voltage system that allows it to operate effectively in environments with higher levels of electrical noise. RS-485 supports inexpensive local networks and multidrop communications links, using the same differential signaling over twisted pair as RS-422. A byproduct of the differential voltage system is the extended data transfer distance, increased transmission speed, and lower voltage use seen with RS485. The ratio of resistance will match the ratio of voltage.

A single set of bias resistors could be used at one end of the network, if the resistance was halved to 720 Ω. The equipment located along a set of RS-485 wires are interchangeably called nodes, stations or devices. If this is required, it can be accomplished by any means desired including RS-485 drivers on an additional network, RS-232 drivers on extra wires, TTL levels, or really anything you can dream up since it won't work with any other RS-485 network except the one you are designing. If so, these drivers could be RS-232 but could also be EIA/TIA-574. In a RS-232 cable, data always flows in only one direction on any particular wire, from TX to RX. RS-232 is only defined for point-to-point connections, so you need a separate cable for each sensor connected to a host CPU. This is why some engineers try to ignore the need for termination resistors. So why do you need to bias the network?