local serdat = {}
function serdat.S1(sdin) 
     if #sdin <= 2 then return end        -- suspect just crlf ??   
        xdin=string.sub(sdin,1,4)
        ydin=string.sub(sdin,1,5)           -- 000>cr
        vt.ESP = #sdin..","..ydin           
        cx = string.find(sdin,"]")              
     if string.sub(sdin,1,2)=="[c" and cx ~= nil then 
           cx  = string.find(sdin,"/")
           vt.cdeg0 = string.sub(sdin,3,cx-1)
           sdin = string.sub(sdin,cx+1,#sdin)
           cx  = string.find(sdin,"/")
           vt.ppm0 = string.sub(sdin,1,cx-1)
           sdin = string.sub(sdin,cx+1,#sdin)
           cx  = string.find(sdin,"/")
           vt.apc0 = string.sub(sdin,1,cx-1)
           sdin = string.sub(sdin,cx+1,#sdin)
           cx  = string.find(sdin,"/")
           vt.ph = string.sub(sdin,1,cx-1)
           sdin = string.sub(sdin,cx+1,#sdin)         
           cx  = string.find(sdin,"]")
           vt.prb = string.sub(sdin,1,cx-1)  
           --uart.write(0,"HB\r\n")                  -
     else                            
           vt.sbuf=vt.sbuf..sdin 
     end                                           
        local strt,endx,sz,xx
        for xx=1,10 do
           sz = #vt.sbuf 
           if sz <= 1023 then break end                                    
           strt,endx=string.find(vt.sbuf,"\r\n")
           vt.sbuf = string.sub(vt.sbuf,endx+1,sz) --RTRIM buffer         
        end    
end 
 
return serdat