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Using a repeater, the main cable is divided into different segments, each of which can be up to 700 m in length and connect 32 devices (this number includes the repeaters). The main difference is, that pin 1 and 6 on the RJ11 socket of the MJ20-PRG module are used as power supply. In this case it is possible to connect the main inlet and outlet terminal directly to the terminals of an instrument without creating a branch. If on the other hand each terminal can accept only a single cable, a proper branch must be created using three auxiliary terminals for each instrument to be connected. 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.

Some of these converters can convert from RS232 to both RS485 and RS422 however many standard models only has one of the protocols. We can also use this to upload to our long-term storage data logger online. So in order to transfer data from a RS232 serial interface engineers need a converter to be able to connect to a RS485 or RS422 interface. Buy by filling out the order form below. 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). You can easily connect more devices by splitting the cable at one connector and adding another cable to it. 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.

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. We have also included the most widespread industrial standards, HTTP and MQTT, so that our elements can be used in any automation. Our plans to upgrade our solar PV system this year are slowly progressing with installing a new Solis 1.5kW inverter and an EM112 Series Energy Meter, which have RS485 output and communicate using Modbus protocol. But we didn't want to do a "closed system". 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!).

TXsoil is a compact and low consumption sensor that can measure and transmit the humidity of the ground WiFi or RF or GSM. It is IP56 boxed for outdoor use: it resists rain but we recommend positioning it raised from the ground so that it is not submerged: it is not underwater! Utilizing a series of dedicated interface devices, it allows PCs and industrial controllers to communicate. The RS485 interface allows the creation of multipoint networks. To connect an RS485 device or RS485 network to any PC or controller, the PC or the controller should provide RS485 interface also. Xwire protocol over RS485 will allow cable runs of up to 1km - with suitable cable and grounding precautions- and up to 32 devices. For RS232a crossover cable is used where pin 1 is connected with pin 6 at the other connector, pin 2 with pin 5, etc. This interconnects the transmit and receive signals of both PLCs, and also the handshaking signals DTR and DSR.

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