Somfy RS-485 Protocol - Printable Version

Somfy RS-485 Protocol - Printable Version

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Somfy RS-485 Protocol - ceyhanc - 16.01.2017

Dear All,

We have a project that we will integrate with Somfy blinds and shutter.
We will communicate and control with some extra transmitter/gateway device which is converting RS485 commands to RF signals.
All blinds and shutters get RF commands from this transmitter/gateway device.

It has a special for RS485 protocol and commands for communication & control.
We need to implement this protocol commands to LM.
I attached RS485 protocol guide & transmitter/gateway device documentation below.

What we need ?
We need to communicate with transmitter/gateway to send basic blinds & shutter commands. such as open/close,up/down etc.

Can you help us ?
BR
Ceyhan

RE: Somfy RS-485 Protocol - buuuudzik - 16.01.2017

You can do this in such way:
1. prepare a user.somfy library with:
- a table with every commands for every channel (up, down, +, -, program, set) e.g.

Code:
Somfy = {

 ch01 = {

  up = string.char(0x7F,0xF2,0xFA,0xB8,0x43,0xFA,0x00,0x00,0x00,0xFF,0xFE,0x06,0x5D),}}

- communication function

Code:
-- Send to Somfy transmitter

somfy_send(cmd)

port = require('serial').open('/dev/RS485', {

baudrate = 4800, 

parity = 'odd', 

duplex = 'half', 

databits = 8, 

stopbits = 1

})

port:write(cmd)

end

2. Use it in event-based script.

Code:
somfy_send(Somfy.ch01.up)

3. You can also improve this with a function of buffering based on UDP because somfy transmitter is very slow. E.g. for sending step command 0,4s; up/down 0,6s; program 6s. So when you will send some command too fast(too soon after last command), it will not work.

Please check:
http://forum.logicmachine.net/showthread.php?tid=399&highlight=somfy

RE: Somfy RS-485 Protocol - ceyhanc - 18.01.2017

Thank you for your support. buuuudzik it will help me so much.
If i will find good solution i will share from there.

BR
Ceyhan

RE: Somfy RS-485 Protocol - buuuudzik - 18.01.2017

You're welcome. The best would be if there will some command generator, because when you change device to new one you must update all commands.

RE: Somfy RS-485 Protocol - ceyhanc - 18.01.2017

Dear buuuudzik,

I started workout on programming it.

Can you help me about messages ? I'm so new about that Smile

For example can you share with me your correct example messages (up/down +/- )

or write basic (up) message for me like your example ?
( RTS transmitter node ID : 05B8E1, channel : 2 , MSG 80h, function : 01h <up>)

Somfy = {
ch01 = {
up = string.char(0x7F,0xF2,0xFA,0xB8,0x43,0xFA,0x00,0x00,0x00,0xFF,0xFE,0x06,0x5D),}}

note: I did UDP Buffer script.

BR
Ceyhan

RE: Somfy RS-485 Protocol - buuuudzik - 18.01.2017

To prepare commands you can use a special tool from Somfy: SOMFY_rs485_frame_builder.

I've attached the manual for this app.

RE: Somfy RS-485 Protocol - Ravi Kiran S - 17.09.2020

Hi

i have created this in user.somfey in liberary

Somfy = {
ch01 = {
up = string.char(0x7F,0xF2,0xFA,0xB8,0x43,0xFA,0x00,0x00,0x00,0xFF,0xFE,0x06,0x5D),}}

and in event communication function also i have done this code also

- Send to Somfy transmitter
somfy_send(cmd)
port = require('serial').open('/dev/RS485', {
baudrate = 4800,
parity = 'odd',
duplex = 'half',
databits = 8,
stopbits = 1
})
port:write(cmd)
end

but the last end i given the error so i have removed end also

In event base script i have done the
omfy_send(cmd)
port = require('serial').open('/dev/RS485', {
baudrate = 4800,
parity = 'odd',
duplex = 'half',
databits = 8,
stopbits = 1
})
string.char(0x7F,0xF2,0xFA,0xB8,0x43,0xFA,0x00,0x00,0x00,0xFF,0xFE,0x06,0x5D),}}
this with the hexacode given by somfy vendor

but the contoller is not working

so please tell the procedure todo because i am doing it first time

Thanks

RE: Somfy RS-485 Protocol - buuuudzik - 17.09.2020

You must have:
- id of your Somfy RS-485 transmitter,
- path to your RS-485 port from Logic Machine (often LM has more than one),
- use frame builder to prepare apropriate command e.g. up or down
- you can log the response from serial

RE: Somfy RS-485 Protocol - Ravi Kiran S - 18.09.2020

(17.09.2020, 18:17)buuuudzik Wrote: You must have:
- id of your Somfy RS-485 transmitter,
- path to your RS-485 port from Logic Machine (often LM has more than one),
- use frame builder to prepare apropriate command e.g. up or down
- you can log the response from serial

Hi

- yes i have id of the transmitter but where i have to write
- i have connected to the RS485-3 means port 3
- using the frame builder only i have all hexa codes
so this is the code i have write in event based script but it is not working

-- for curtain up

if not port then
require('serial')
port = serial.open('/dev/RS485-3', {
baudrate = 4800,
parity = 'odd',
databits = 8,
stopbits = 1,
duplex = 'half'
})
port:flush()
end
if port then
ch01=up
char = string.char(0x7F, 0xF2, 0xFA, 0x01, 0x00, 0x00, 0xB5, 0x2B, 0xFA, 0xFF, 0xFE, 0x06, 0x43)
-- wait for 1.5 seconds
os.sleep(0.1)
char = string.char(0x7F, 0xF2, 0xFA, 0x01, 0x00, 0x00, 0xB5, 0x2B, 0xFA, 0xFF, 0xFE, 0x06, 0x43)
alert(char)
port:write(char)
end

-- For curtain down
if not port then
require('serial')
port = serial.open('/dev/RS485-3', {
baudrate = 4800,
parity = 'odd',
databits = 8,
stopbits = 1,
duplex = 'half'
})
port:flush()
end
if port then
char = string.char(0x7F, 0xF2, 0xFA, 0x01, 0x00, 0x00, 0xB5, 0x2B, 0xFA, 0xFF, 0xFE, 0x06, 0x42)
-- wait for 1.5 seconds
os.sleep(0.1)
char = string.char(0x7F, 0xF2, 0xFA, 0x01, 0x00, 0x00, 0xB5, 0x2B, 0xFA, 0xFF, 0xFE, 0x06, 0x42)
alert(char)
port:write(char)
end

pls do needfull todo work

RE: Somfy RS-485 Protocol - buuuudzik - 18.09.2020

Another thing is that this is wireless so sometimes length is too much, the best is testing when transmitter see the blind.

Today unfortunately I dont have enough time to do such tutorial maybe someone else.

RE: Somfy RS-485 Protocol - myg - 23.09.2020

FWIW, I have shutters/blinds RF integration based on Sonoff RF bridge flashed with custom firmware, it connects to MQTT that's running on LM, but it also needs WiFi to run. It's super cheap and easy to program, and you can issue simple MQTT commands to operate.

RE: Somfy RS-485 Protocol - BrentW - 17.07.2022

(17.09.2020, 18:17)buuuudzik Wrote: You must have:
- id of your Somfy RS-485 transmitter,
- path to your RS-485 port from Logic Machine (often LM has more than one),
- use frame builder to prepare apropriate command e.g. up or down
- you can log the response from serial

Hi Buuuudzik,

Have you had experience with reading the response from the nodes?
I.e. if you use the broadcast message 'get node address'??

The returned message from the node appears as symbols when logged?

BW

RE: Somfy RS-485 Protocol - Joep - 14.09.2023

With the script below i now can control one motor. But that motor was already programmed by a remote control. Now my question is if someone can tell me if and how it's possible to program a new motor from scratch on please as i totaly don't understand the protocol and all of its functions. There is no manuel explaining the RTS protocol so i'm really confused..

value = event.getvalue()

require('serial')
port = serial.open('/dev/RS485', {
baudrate = 4800,
databits = 8,
stopbits = 1,
parity = 'odd',
duplex = 'half'
})

if value == false then
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFE,0x06,0xA5))
else
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFD,0x06,0xA4))
end

log(res, err)

RE: Somfy RS-485 Protocol - Bitver - 14.09.2023

(14.09.2023, 13:41)Joep Wrote: With the script below i now can control one motor. But that motor was already programmed by a remote control. Now my question is if someone can tell me if and how it's possible to program a new motor from scratch on please as i totaly don't understand the protocol and all of its functions. There is no manuel explaining the RTS protocol so i'm really confused..

value = event.getvalue()

require('serial')
port = serial.open('/dev/RS485', {
baudrate = 4800,
databits = 8,
stopbits = 1,
parity = 'odd',
duplex = 'half'
})

if value == false then
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFE,0x06,0xA5))
else
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFD,0x06,0xA4))
end

log(res, err)

You should know address of motors and implement your sendRS485 function with your connection parameters.
Check code below it would be great if it works you, but I can't be responsible for it.
It work with my motors.

Code:
-- 1/0 up/down

function rs485windowControl(value, address) 

  msg = bit.bxor(0x80, 0xFF)

    len = bit.bxor(0x0D, 0xFF)

    con = bit.bxor(0x05, 0xFF)

    sr1 = bit.bxor(0xFE, 0xFF)

    sr2 = bit.bxor(0xFF, 0xFF)

    sr3 = bit.bxor(0xFF, 0xFF)

    de1 = bit.bxor(0x72, 0xFF)

    de2 = bit.bxor(0xBB, 0xFF)

    de3 = bit.bxor(0x05, 0xFF)

    da1 = bit.bxor(address, 0xFF) -- address

    local da2

    if value then

      da2 = bit.bxor(0x01, 0xFF)

    else

        da2 = bit.bxor(0x02, 0xFF)

    end

    sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2

    sum1, sum2 = Int16ToBytes(sum, 'little')

    sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1))

end

function rs485windowStop(address) 

  msg = bit.bxor(0x80, 0xFF)

    len = bit.bxor(0x0D, 0xFF)

    con = bit.bxor(0x05, 0xFF)

    sr1 = bit.bxor(0xFE, 0xFF)

    sr2 = bit.bxor(0xFF, 0xFF)

    sr3 = bit.bxor(0xFF, 0xFF)

    de1 = bit.bxor(0x72, 0xFF)

    de2 = bit.bxor(0xBB, 0xFF)

    de3 = bit.bxor(0x05, 0xFF)

    da1 = bit.bxor(address, 0xFF) -- address

    da2 = bit.bxor(0x03, 0xFF)

    sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2

    sum1, sum2 = Int16ToBytes(sum, 'little')

    sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1))

end

function rs485windowSetChannel(address) 

  msg = bit.bxor(0x97, 0xFF)

    len = bit.bxor(0x0C, 0xFF)

    con = bit.bxor(0x05, 0xFF)

    sr1 = bit.bxor(0xFE, 0xFF)

    sr2 = bit.bxor(0xFF, 0xFF)

    sr3 = bit.bxor(0xFF, 0xFF)

    de1 = bit.bxor(0x72, 0xFF)

    de2 = bit.bxor(0xBB, 0xFF)

    de3 = bit.bxor(0x05, 0xFF)

    da1 = bit.bxor(address, 0xFF) -- address

    sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1

    sum1, sum2 = Int16ToBytes(sum, 'little')

    sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1, sum2, sum1))

end

function rs485windowMy(address) 

  msg = bit.bxor(0x80, 0xFF)

    len = bit.bxor(0x0D, 0xFF)

    con = bit.bxor(0x05, 0xFF)

    sr1 = bit.bxor(0xFE, 0xFF)

    sr2 = bit.bxor(0xFF, 0xFF)

    sr3 = bit.bxor(0xFF, 0xFF)

    de1 = bit.bxor(0x72, 0xFF)

    de2 = bit.bxor(0xBB, 0xFF)

    de3 = bit.bxor(0x05, 0xFF)

    da1 = bit.bxor(address, 0xFF) -- address

    da2 = bit.bxor(0x04, 0xFF)

    sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2

    sum1, sum2 = Int16ToBytes(sum, 'little')

    sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1))

end

function rs485windowHeight(value, address) 

  local tilt = 1

  if value <= 127 then

    value = 128 - value

  else

    tilt = 0

    value = 256 - value + 127

  end

  msg = bit.bxor(0x81, 0xFF)

    len = bit.bxor(0x0D, 0xFF)

    con = bit.bxor(0x05, 0xFF)

    sr1 = bit.bxor(0xFE, 0xFF)

    sr2 = bit.bxor(0xFF, 0xFF)

    sr3 = bit.bxor(0xFF, 0xFF)

    de1 = bit.bxor(0x72, 0xFF)

    de2 = bit.bxor(0xBB, 0xFF)

    de3 = bit.bxor(0x05, 0xFF)

    da1 = bit.bxor(address, 0xFF) -- address

  da2 = value

    sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2

    sum1, sum2 = Int16ToBytes(sum, 'little')

    sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1))

end

function Int16ToBytes(num, endian)

  if num < 0 then 

      num = bit.band(num, 0xFFFF)

  end

  highByte = bit.rshift(bit.band(num, 0xFF00), 8)

  lowByte  = bit.band(num, 0xFF)

  if endian == "little" then

      lowByte, highByte = highByte, lowByte

  end

  return highByte,lowByte

end

RE: Somfy RS-485 Protocol - Joep - 15.09.2023

(14.09.2023, 20:37)Bitver Wrote:
(14.09.2023, 13:41)Joep Wrote: With the script below i now can control one motor. But that motor was already programmed by a remote control. Now my question is if someone can tell me if and how it's possible to program a new motor from scratch on please as i totaly don't understand the protocol and all of its functions. There is no manuel explaining the RTS protocol so i'm really confused..

value = event.getvalue()

require('serial')
port = serial.open('/dev/RS485', {
baudrate = 4800,
databits = 8,
stopbits = 1,
parity = 'odd',
duplex = 'half'
})

if value == false then
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFE,0x06,0xA5))
else
res, err = port:write(string.char(0x7F,0xF2,0xFA,0xC9,0x7B,0xFA,0x00,0x00,0x00,0xFE,0xFD,0x06,0xA4))
end

log(res, err)

You should know address of motors and implement your sendRS485 function with your connection parameters.
Check code below it would be great if it works you, but I can't be responsible for it.
It work with my motors.

Code:
-- 1/0 up/down function rs485windowControl(value, address) msg = bit.bxor(0x80, 0xFF) len = bit.bxor(0x0D, 0xFF) con = bit.bxor(0x05, 0xFF) sr1 = bit.bxor(0xFE, 0xFF) sr2 = bit.bxor(0xFF, 0xFF) sr3 = bit.bxor(0xFF, 0xFF) de1 = bit.bxor(0x72, 0xFF) de2 = bit.bxor(0xBB, 0xFF) de3 = bit.bxor(0x05, 0xFF) da1 = bit.bxor(address, 0xFF) -- address local da2 if value then da2 = bit.bxor(0x01, 0xFF) else da2 = bit.bxor(0x02, 0xFF) end sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2 sum1, sum2 = Int16ToBytes(sum, 'little') sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1)) end function rs485windowStop(address) msg = bit.bxor(0x80, 0xFF) len = bit.bxor(0x0D, 0xFF) con = bit.bxor(0x05, 0xFF) sr1 = bit.bxor(0xFE, 0xFF) sr2 = bit.bxor(0xFF, 0xFF) sr3 = bit.bxor(0xFF, 0xFF) de1 = bit.bxor(0x72, 0xFF) de2 = bit.bxor(0xBB, 0xFF) de3 = bit.bxor(0x05, 0xFF) da1 = bit.bxor(address, 0xFF) -- address da2 = bit.bxor(0x03, 0xFF) sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2 sum1, sum2 = Int16ToBytes(sum, 'little') sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1)) end function rs485windowSetChannel(address) msg = bit.bxor(0x97, 0xFF) len = bit.bxor(0x0C, 0xFF) con = bit.bxor(0x05, 0xFF) sr1 = bit.bxor(0xFE, 0xFF) sr2 = bit.bxor(0xFF, 0xFF) sr3 = bit.bxor(0xFF, 0xFF) de1 = bit.bxor(0x72, 0xFF) de2 = bit.bxor(0xBB, 0xFF) de3 = bit.bxor(0x05, 0xFF) da1 = bit.bxor(address, 0xFF) -- address sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 sum1, sum2 = Int16ToBytes(sum, 'little') sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1, sum2, sum1)) end function rs485windowMy(address) msg = bit.bxor(0x80, 0xFF) len = bit.bxor(0x0D, 0xFF) con = bit.bxor(0x05, 0xFF) sr1 = bit.bxor(0xFE, 0xFF) sr2 = bit.bxor(0xFF, 0xFF) sr3 = bit.bxor(0xFF, 0xFF) de1 = bit.bxor(0x72, 0xFF) de2 = bit.bxor(0xBB, 0xFF) de3 = bit.bxor(0x05, 0xFF) da1 = bit.bxor(address, 0xFF) -- address da2 = bit.bxor(0x04, 0xFF) sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2 sum1, sum2 = Int16ToBytes(sum, 'little') sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1)) end function rs485windowHeight(value, address) local tilt = 1 if value <= 127 then value = 128 - value else tilt = 0 value = 256 - value + 127 end msg = bit.bxor(0x81, 0xFF) len = bit.bxor(0x0D, 0xFF) con = bit.bxor(0x05, 0xFF) sr1 = bit.bxor(0xFE, 0xFF) sr2 = bit.bxor(0xFF, 0xFF) sr3 = bit.bxor(0xFF, 0xFF) de1 = bit.bxor(0x72, 0xFF) de2 = bit.bxor(0xBB, 0xFF) de3 = bit.bxor(0x05, 0xFF) da1 = bit.bxor(address, 0xFF) -- address da2 = value sum = msg + len + con + sr1 + sr2 + sr3 + de1 + de2 + de3 + da1 + da2 sum1, sum2 = Int16ToBytes(sum, 'little') sendRS485(string.char(msg, len, con, sr1, sr2, sr3, de1, de2, de3, da1,da2, sum2, sum1)) end function Int16ToBytes(num, endian) if num < 0 then num = bit.band(num, 0xFFFF) end highByte = bit.rshift(bit.band(num, 0xFF00), 8) lowByte = bit.band(num, 0xFF) if endian == "little" then lowByte, highByte = highByte, lowByte end return highByte,lowByte end

Thanks for your answer and sharing your code. My biggest issue is how to set the correct channel? How is this done? First with a Somfy remote and once paired you can also control it by the script or how does it work?

RE: Somfy RS-485 Protocol - Bitver - 15.09.2023

(15.09.2023, 12:04)Joep Wrote: Thanks for your answer and sharing your code. My biggest issue is how to set the correct channel? How is this done? First with a Somfy remote and once paired you can also control it by the script or how does it work?

Only address is needed for control by script. If you need RTS channels check rs485windowSetChannel function or remote controller.
Also I think you should check your motors documentation first for proper initial installation.

RE: Somfy RS-485 Protocol - Joep - 18.09.2023

(15.09.2023, 19:47)Bitver Wrote:
(15.09.2023, 12:04)Joep Wrote: Thanks for your answer and sharing your code. My biggest issue is how to set the correct channel? How is this done? First with a Somfy remote and once paired you can also control it by the script or how does it work?
Only address is needed for control by script. If you need RTS channels check rs485windowSetChannel function or remote controller.
Also I think you should check your motors documentation first for proper initial installation.

Thanks Bitver. That helped me.