Add quotes to Json Value

[Steve-Mcl]

@Le-bo2d9

msg.payload = {"command":"udevice","idx":1436,"nvalue":0,"svalue":msg.payload.FlowRate}

Since it is a number, you can use .toString()
msg.payload = {"command":"udevice","idx":1436,"nvalue":0,"svalue":String(msg.payload.FlowRate.toString())}

Or, you can append ""
msg.payload = {"command":"udevice","idx":1436,"nvalue":0,"svalue":String(msg.payload.FlowRate+"")}

Or use the String() function
msg.payload = {"command":"udevice","idx":1436,"nvalue":0,"svalue":String(msg.payload.FlowRate)}