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Introduction 

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1  Introduction 

The Programmers Guide provides the necessary information how to send UDP commands to your charging 
station. It gives you the possibility to get status information from the charging station or control it with an UDP 
Client (PC software or Smartphone App). 

 

The 

User Datagram Protocol (UDP)

 is a simple network protocol that belongs to the transport layer of the 

Internet protocol family. 

 

With suitable Home automation controllers it is also possible to realize e.g. a reduction of your energy con-
sumption in conjunction with a photovoltaic system and your charging station. 
 
 

Schematic overview (example) 

 

 

1.1  Requirements 

The following requirements have to be met to use the UDP functionality: 

 

 

KeContact P20 Charging station with network connection (LSA+ socket) 
- Product code: KC-P20-xxxxxx

2

x-xxx or KC-P20-xxxxxx

3

x-xxx 

- Firmware version: 2.5 or higher. 

 

 

Enabled UDP function with DIP-switch DWS1.3 = ON (for details about the DIP-switches please re-
fer 

to the “Installation manual”). 

 

 

Router or Smart-Home Server with integrated web server. 

 

 

A PC or smartphone for sending the UDP commands. 
This also requires a suitable UDP Client software or UDP App. 

 

Summary of Contents for KeContact P20

Page 1: ...KeContact P20 Charging station UDP Programmers Guide V 3 00 Original manual...

Page 2: ...meanings Notice Notes on use of equipment and useful practical tips are identified by Notice Notices do not con tain any information that draws attention to potentially dangerous or harmful functions...

Page 3: ...ommands 5 2 1 General information 5 2 2 Supported UDP commands 5 2 3 UDP Broadcast Messages 6 2 4 UDP command i 7 2 5 UDP command failsafe 7 2 6 UDP command report 8 2 7 UDP command ena 10 2 8 UDP com...

Page 4: ...realize e g a reduction of your energy con sumption in conjunction with a photovoltaic system and your charging station Schematic overview example 1 1 Requirements The following requirements have to...

Page 5: ...nt to the charging station as simple text commands without end characters such as CR or LF The answers come as data packages with up to 512 bytes and are formatted in JSON standard each data line with...

Page 6: ...RFID not enabled 2 ready for charging waiting for EV charging request S2 3 charging 4 error 5 authorization rejected Plug Current condition of the loading connection 0 unplugged 1 plugged on charging...

Page 7: ...l the next startup of the device 1 Saves the settings into the EEPROM in order to activate the failsafe function automatically after restarting the device By default this feature is disabled and must...

Page 8: ...put 0 Input 0 Serial 15017355 Sec 4294967296 Description ID ID of the retrieved report State Current state of the charging station 0 starting 1 not ready for charging e g unplugged X1 or ena not enabl...

Page 9: ...energy limit Output State of the output X2 Input State of the potential free Enable input X1 When using the input please pay attention to the information in the installation manual Serial Serial numbe...

Page 10: ...adcast message ATTENTION Some electric vehicles EVs do not yet meet the standard requirements and an ena 0 can lead to an error in the charging station 2 8 UDP command curr UDP command curr n Reply TC...

Page 11: ...eiving of the command and not the cor rectness of the value Values between 2 and 9 are not answered reserved functions Invalid values e g letters are leading to a deactivation of the relay The correct...

Page 12: ......

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