Tema: node red axpert max 2

Buenas
Tengo un axpert max conectado con un USR 405 via tcp,he seguido el manual de Tejota,pero al final le puesto un TCP ya q uso Homeassistant SO,en una rpi3
He intentado seguir muchos mensajes,y al final me he quedado atasco en un paso que no encuentro la solucion.
este es mi flow,me sale siempre este error "TypeError: msg.payload.split is not a function" , y nose xq
[{"id":"0cae1ee3e493dae3","type":"tab","label":"Flo w 1","disabled":false,"info":"","env":[]},{"id":"996fbd9b31ceeda1","type":"tcp request","z":"0cae1ee3e493dae3","name":"","server" :"192.168.1.145","port":"26","out":"time","ret":"b uffer","splitc":"0","newline":"","trim":false,"tls ":"","x":500,"y":260,"wires":[["cc6fda07cf864ef1"]]},{"id":"c096fde10225b17f","type":"debug","z":"0ca e1ee3e493dae3","name":"debug 1","active":true,"tosidebar":true,"console":false, "tostatus":false,"complete":"payload","targetType" :"msg","statusVal":"","statusType":"auto","x":760, "y":240,"wires":[]},{"id":"9a00e46a3a8af34a","type":"inject","z":"0c ae1ee3e493dae3","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay" :"10","topic":"","payload":"","payloadType":"date" ,"x":100,"y":300,"wires":[["c053a1c05ab1d404"]]},{"id":"c053a1c05ab1d404","type":"function","z":" 0cae1ee3e493dae3","name":"QPIRI","func":"var data = new Buffer([0x51, 0x50, 0x49, 0x52, 0x49, 0xf8, 0x54, 0xd]);\nmsg.payload = {};\nmsg.topic = "QPIRI";\nmsg.payload = data;\nreturn msg;\n","outputs":1,"timeout":0,"noerr":0,"initial ize":"","finalize":"","libs":[],"x":250,"y":280,"wires":[["996fbd9b31ceeda1"]]},{"id":"cc6fda07cf864ef1","type":"function","z":" 0cae1ee3e493dae3","name":"QPIRI","func":"var output = msg.payload.split(" ");\nlet voltajeredconf = parseFloat((output[0].slice(1, 5)));\nlet amperiosredmaxconf = parseFloat(output[1]);\nlet voltajesalidaconf = parseFloat(output[2]);\nlet frecuenciasalidaconf = parseFloat(output[3]);\nlet amperiossalidaconf = parseFloat(output[4]);\nlet potenciaaparentesalidaconf = parseFloat(output[5]);\nlet potenciaactivasalidaconf = parseFloat(output[6]);\nlet voltajebateriaconf = parseInt(output[7]);\nlet voltajelimitedescargabatconf = parseFloat(output[8]);\nlet voltajelimiterecargabatconf = parseFloat(output[22]);\nlet voltajeminimoparacorteconf = parseFloat(output[9]);\nlet voltajeabsorcionconf = parseFloat(output[10]);\nlet voltajeflotacionconf = parseFloat(output[11]);\nlet tipodebateriaconf = parseInt(output[12]);\nlet amperiosmaxcargadorbatconf = parseInt(output[13]);\nlet amperiosmaxtotalesabatconf = parseInt(output[14]);\nlet rangovoltajedentradaconf = parseInt(output[15]);\nlet prioridadfuentesalidaconf = parseInt(output[16]);\nlet prioridadcargadorbatconf = parseInt(output[17]);\nlet maximonumeroparalelosconf = parseInt(output[18]);\nlet tipodemaquina = parseInt(output[19]);\nlet tipodehibridoconf = parseInt(output[20]);\nlet tipodesalidaparaleloconf = parseInt(output[21]);\nlet potenciasolarparaleloconf = parseInt(output[23]);\nlet potenciasolarbalanceconf = parseInt(output[24]);\nreturn [\n {\n payload: {\n voltajeredconf: voltajeredconf,\n amperiosredmaxconf: amperiosredmaxconf,\n voltajesalidaconf: voltajesalidaconf,\n frecuenciasalidaconf: frecuenciasalidaconf,\n amperiossalidaconf: amperiossalidaconf,\n potenciaaparentesalidaconf: potenciaaparentesalidaconf,\n potenciaactivasalidaconf: potenciaactivasalidaconf,\n voltajebateriaconf: voltajebateriaconf,\n voltajelimiterecargabatconf: voltajelimiterecargabatconf,\n voltajelimitedescargabatconf: voltajelimitedescargabatconf,\n voltajeminimoparacorteconf: voltajeminimoparacorteconf,\n voltajeabsorcionconf: voltajeabsorcionconf,\n voltajeflotacionconf: voltajeflotacionconf,\n tipodebateriaconf: tipodebateriaconf,\n amperiosmaxcargadorbatconf: amperiosmaxcargadorbatconf,\n amperiosmaxtotalesabatconf: amperiosmaxtotalesabatconf,\n rangovoltajedentradaconf: rangovoltajedentradaconf,\n prioridadfuentesalidaconf: prioridadfuentesalidaconf,\n prioridadcargadorbatconf: prioridadcargadorbatconf,\n maximonumeroparalelosconf: maximonumeroparalelosconf,\n tipodemaquina: tipodemaquina,\n tipodehibridoconf: tipodehibridoconf,\n tipodesalidaparaleloconf: tipodesalidaparaleloconf,\n potenciasolarparaleloconf: potenciasolarparaleloconf,\n potenciasolarbalanceconf: potenciasolarbalanceconf\n }\n }\n]","outputs":1,"timeout":0,"noerr":0,"initialize":" ","finalize":"","libs":[],"x":570,"y":380,"wires":[["c096fde10225b17f"]]}]