General description of the Simplebus2 protocol used by some Comelit's intercoms. Hardware for retransmitting Simplebus2 messages over UART.
License: Creative Commons Zero v1.0 Universal
Hello, very nice project.
Do you by chance have figured out how the audio is managed on the bus? What about the video?
I have detected these headers in the board 6721W . J5 looks an I2C bus and J4 for mcu programming.
It would be interesting to explore J5.
Also, I am thinking if TP12 and TP13 Rx and TX would show the messages in 0-5V
Do you have a description of the A/V protocol that is used on simplebus2? Would be really cool to hack together a device that can hook into the A/V stream & relay it onto my network.
Hi,
I would like to make this project but I'm not an electronic expert.
Could someone tell what is the type and voltage values of each capacitor?
Also which type of diodes for the full bridge rectifier?
Hi plusvic,
I like to use your fabulous work in a similar project (S2 bus > ESP8266 > Node Red > Apple HomeKit). Now I have some questions, that you maybe can answer:
Best regards and thanks in advance,
Thomas
Hey, this looks awesome! I was just wondering, did you make the PCB yourself or did you create/build/assemble is somewhere?
simplebus2-repeater.kicad_pcb seems to be empty so jlcpcb.com seems to be a no-go
Hi!,
Very helpful and complete protocol description! Congrats!!
I was wondering if the PIC12F508 can be more easily replaced with a ESP8266 or other chip easier to find / program.
I've read about your first prototypes with 433MHz transceiver and/or ESP8266. Could you share more details about?
Still Many Thanks for your great job!
Hi,
I made the repeater based on the schematic. For the remote unit I use an esp32.
At first I wasn't receiving anything. Then I tweaked the remote unit code to print all messages and that worked except that the message codes wasn't like yours and the checksum received didn't match the calculated one.
I was on a breadboard so I soldered the repeater on a perf board but that didn't solve the problem.
I tried to make my intercom ring with a button for the test with no luck.
Here is an example of what I have with the calculated checksum and the received:
RX <- code: 191 address: 254 checksum: 14 checksum received: 15
RX <- code: 191 address: 14 checksum: 10 checksum received: 0
RX <- code: 246 address: 15 checksum: 10 checksum received: 0
RX <- code: 255 address: 15 checksum: 12 checksum received: 0
RX <- code: 2 address: 0 checksum: 1 checksum received: 0
RX <- code: 0 address: 232 checksum: 4 checksum received: 15
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 191 address: 14 checksum: 10 checksum received: 14
RX <- code: 163 address: 254 checksum: 11 checksum received: 14
RX <- code: 191 address: 142 checksum: 11 checksum received: 14
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 3 address: 12 checksum: 4 checksum received: 14
RX <- code: 254 address: 15 checksum: 11 checksum received: 0
RX <- code: 248 address: 31 checksum: 10 checksum received: 12
RX <- code: 255 address: 15 checksum: 12 checksum received: 0
RX <- code: 2 address: 0 checksum: 1 checksum received: 0
RX <- code: 191 address: 14 checksum: 10 checksum received: 14
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 191 address: 142 checksum: 11 checksum received: 14
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 132 address: 14 checksum: 5 checksum received: 0
RX <- code: 0 address: 20 checksum: 2 checksum received: 14
RX <- code: 132 address: 14 checksum: 5 checksum received: 0
RX <- code: 135 address: 10 checksum: 6 checksum received: 0
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 191 address: 14 checksum: 10 checksum received: 14
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 138 address: 10 checksum: 5 checksum received: 0
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 11 address: 12 checksum: 5 checksum received: 0
RX <- code: 144 address: 14 checksum: 5 checksum received: 0
RX <- code: 191 address: 142 checksum: 11 checksum received: 14
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 191 address: 14 checksum: 10 checksum received: 14
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
RX <- code: 154 address: 10 checksum: 6 checksum received: 0
RX <- code: 155 address: 10 checksum: 7 checksum received: 0
RX <- code: 25 address: 108 checksum: 7 checksum received: 14
RX <- code: 191 address: 142 checksum: 11 checksum received: 14
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 191 address: 142 checksum: 11 checksum received: 14
RX <- code: 3 address: 0 checksum: 2 checksum received: 0
When I call from the building:
RX <- code: 84 address: 5 checksum: 5 checksum received: 0
RX <- code: 150 address: 10 checksum: 6 checksum received: 0
RX <- code: 255 address: 15 checksum: 12 checksum received: 14
RX <- code: 131 address: 254 checksum: 10 checksum received: 14
RX <- code: 191 address: 14 checksum: 10 checksum received: 0
My address is 5.
Thanks for putting your work in open and described in detail !
I was wondering have you tried to make it work the other way round, sending door open signal from your desk o the intercom ?
Any tips/directions how to achieve that ?
Is it possible to receive the hex file of the asm programm? PIC Programming is new to me and converting this to an Hex file in order to flash it through a K150 flasher is not straight forward unfortunately.
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