Somfy RS-485 Protocol

[Joep]

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?