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). We have also included the most widespread industrial standards, HTTP and MQTT, so that our elements can be used in any automation. The probe is available with 0.8m or 3m cable; and possibly can be replaced by anyone with good dexterity. 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).

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). There is also the GSM version; especially useful when only one sensor is needed in a remote location where other types of transmission cannot be used. Basically, therefore, they can be used with RXTXeasy GSM or DisplayRX or ControlHUB.. 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. TXsoil is a compact and low consumption sensor that can measure and transmit the humidity of the ground WiFi or RF or GSM. Rs485 is low impedance balanced , so twisting the pair helps with noise immunity as well as reducing the attenuation effect of higher baud rates due to the parallel capacitance of the wires in the cable jacket over the long lengths. To prevent noise to interfere with the communications, often twisted pair cable is used.

If handshaking is not necessary, an ordinary 4 wire telephone cable could be used, provided that the pins are cross-connected as shown in the picture below. But You stated you are going to install this at a commercial setting, so it always better to use the worst case environment situations, and use shielded cable. We tried to build an organic system so that whoever gets a TXtemp, TXsoil sensor or a bridge for RS232 or ModBus sensors and devices like TXdata can immediately use them without wasting time in configurations (and we also took the opportunity to insert some things into our system some "extra" not foreseen by the standards!). 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). In the WiFi settings (as in the figure above illustrating B), choose "WiFi MQTT".

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. You can enter the data relating to the MQTT Broker you want to use; the name of the Topic to be used to control it and to read the periodic transmissions of the humidity percentage is shown. But we didn't want to do a "closed system". The normal way to implement this is with a two wire system with differential signal levels. And the results before was a degraded signal that the devices near the end would interpret the signal incorrectly. The A signals of all devices should be connected with each other and the same goes for the B signals. Now there was certain instances I used STP wire for rs485 because I had a lot of devices connected in a long run chain (DMX512 lighting fixtures). RS485 communication cable, then connect back of the DVR panel. DVR on that assign camera ID.. 18,90 EUR Sonda Umidità addiz. GSM 58,90 EUR Sonda Umidità addiz.

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