github-mirrors/pyPLC
1
0
Fork 0
mirror of https://github.com/uhi22/pyPLC.git synced 2024-11-20 01:13:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

docu: added RfDetector

Browse source
This commit is contained in:
uhi22 2023-03-24 23:29:35 +01:00
parent ec955273fe
commit 39db41bde4
2 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

BIN
doc/RfDetector_schematic.jpg Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 26 KiB

12
doc/hardware.md
View file

@ -94,6 +94,18 @@ Both, DieterHV and DieterLV communicate with 5V serial line with 19200 Baud. To
Its receive path is feed by the DieterHV via optocoupler, and its transmit path is connected to the DieterLV via a protection resistor. Its receive path is feed by the DieterHV via optocoupler, and its transmit path is connected to the DieterLV via a protection resistor.
On software side, the python module hardwareInterface.py handles the communication with the serial devices. On software side, the python module hardwareInterface.py handles the communication with the serial devices.
## CCS Detector
In some cases it may help to "hear" the CCS communication, to understand what is going on. For this, a detector receiver can be used,
e.g. this one:
![image](RfDetector_schematic.jpg)
By placing the antenna near to the charging cable and just listening, it is possible to differentiate the following cases:
* Silence: No communication is going on. No homeplug coordinator is present. No 1kHz PWM is present.
* Continuous uniform rattling noise: Homeplug coordinator (charger) is there. Depending on the chargers implementation, this may be quite loud (e.g. Compleo) or less loud (e.g. Alpitronics).
* 1kHz tone: The charger provides 1kHz PWM.
* Click tones in faster or slower intervals: The communication is ongoing (SLAC, SDP, TCP). Depending on the implementation of the charger and car, this may be very loud (e.g. TPlink modem supplied by 12V) or less loud (some original cars).
## Electric vehicle simulator ## Electric vehicle simulator
This device is able to convince an AC charger to deliver power, and also is needed to tell an DC charger, that a car is connected. By closing the "vehicle detected" switch, we pull the CP from 12V to 9V, and the charger will switch to the 5% PWM and starts listening to SLAC parameter request messages. (If DieterLV is controlling the CP, we do not need the EV simulator anymore.) This device is able to convince an AC charger to deliver power, and also is needed to tell an DC charger, that a car is connected. By closing the "vehicle detected" switch, we pull the CP from 12V to 9V, and the charger will switch to the 5% PWM and starts listening to SLAC parameter request messages. (If DieterLV is controlling the CP, we do not need the EV simulator anymore.)