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<h1>P1 Modbus Dongle </h1>
<h1>P1 Modbus Dongle </h1>
<p>The Modbus P1 Dongle is a device that enables communication between your TeltoCharge EV charging station and a smart meter using the Modbus RS-485 protocol. This setup is essential for accurately monitoring and controlling the energy usage during EV charging sessions.</p>
<p>The Modbus P1 Dongle is a device that enables communication between your TeltoCharge EV charging station and a smart meter using the Modbus RS-485 protocol. This setup is essential for accurately monitoring and controlling the energy usage during EV charging sessions.</p>
* <p>Accurate energy monitoring: Ensures that energy usage data is correctly captured and transmitted.</p>
* <p>Optimized charging: By leveraging the data from the smart meter, the charging station can optimize the charging process, potentially reducing costs and improving efficiency.</p>
<h2>Smart Meter Connection</h2>
<h2>Smart Meter Connection</h2>
*Connect the 'B-' terminal of your cable to the 'B-' port on the TeltoCharge device.
*Connect the 'B-' terminal of your cable to the 'B-' port on the TeltoCharge device.
''Note :'' In case of communication errors, swapping the 'A+' and 'B-' connections might resolve the issue.
''Note :'' In case of communication errors, swapping the 'A+' and 'B-' connections might resolve the issue.
[[File:Modbus p1 dongle -rs485.png|left|frameless]]
[[File:Modbus p1 dongle -rs485.png|frameless|alt=|left|400x400px]]
===General meter settings===
According to your smart meter documentation, please enter all the settings into the Teltonika app as shown.
#'''Energy meter type''': You need to select the type of smart meter (1-phase/3-phase). Please note that you can use a 1-phase charger even if the meter is 3-phase.
#'''RS-485 baud rate''': This information can be found in the meter settings accessible through the meter display. If the client cannot locate it, it is recommended to refer to the smart meter manual.
#'''RS-485 parity/stop bit''': Similarly, this information can also be found in the meter settings. If the client is unable to find it, it is advisable to check the smart meter manual.
[[File:Smart meter.app .png|left|alt=|frameless]]
[[File:Live data.png|border|left|frameless|457x457px]]
''Note :'' After successfully completing these steps, please check the diagnostic live data from the energy meter.