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18,90 EUR Sonda Umidità addiz. GSM 58,90 EUR Sonda Umidità addiz. TXsoil is a compact and low consumption sensor that can measure and transmit the humidity of the ground WiFi or RF or GSM. It has a special capacitive sensor designed by us, efficient and of good precision, waterproof, resistant to oxidation and not subject to variations due to salinity and soil composition: better than this there are only the "extraction pressure" sensors (which we do not propose because they are not durable and also the sensor alone costs hundreds of euros). The probe is available with 0.8m or 3m cable; and possibly can be replaced by anyone with good dexterity. The EIA once labeled all its standards with the prefix "RS" (Recommended Standard), but the EIA-TIA officially replaced "RS" with "EIA/TIA" to help identify the origin of its standards. The recommended arrangement of the wires is as a connected series of point-to-point (multidropped) nodes, i.e. a line or bus, not a star, ring, or multiply connected network. Star and ring topologies are not recommended because of signal reflections or excessively low or high termination impedance. Immediately after the WiFi settings, below the page, there are the MQTT ones.

Works with 4 AA batteries (1.5V, alkaline or Lithium - for outdoor winter use you need to use AA lithium batteries because the alkaline ones suffer from the cold); on request it is also available for working with external 5V power supply. You will need to connect to a WiFi (home, work, laboratory, etc.) through which an MQTT Broker or the Internet is available. 100% humidity, click the "humidity 100%" button and the reference will be stored. 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. If there are several sensors near and/or other data to be transmitted via GSM, it is more convenient to use Standard / RF versions supported on a concentrator or controller such as RXTXeasy GSM so you will be able to use one single SIM.

However this contradicts the facts that an idle mark state is a logical one and the termination polarization puts B at a higher voltage in Profibus guidelines. Without termination resistors, signal reflections off the unterminated end of the cable can cause data corruption. Ideally, the two ends of the cable will have a termination resistor connected across the two wires. In addition to its physical characteristics, RS485 cables also have specific electrical properties that allow for differential signaling, enabling reliable data transmission over longer distances compared to other communication protocols. 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). Digital communications networks implementing the standard can be used effectively over long distances and in electrically noisy environments. It does not specify or recommend any communications protocol; Other standards define the protocols for communication over an RS-485 link. Additionally, the adoption of Ethernet-based communication protocols in industrial automation systems has also influenced the evolution of RS485 cables, with some applications transitioning to higher-speed Ethernet connections for faster data transfer.

Twisted pair structure: Rs485 anti-interference cable has a twisted pair conductor structure. Transmission speed refers to the rate at which data is transferred between devices using the RS485 cable. Purchase by using the following button and adding to the PayPal cart (where you can change the quantity). There is a slight surcharge which covers PayPal fees. 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). 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). 1) connect etc. as for B. and go to Settings.